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## com.verisign.epp.codec.gen
Class EPPUtil

    java.lang.Object
      com.verisign.epp.codec.gen.EPPUtil

    public class EPPUtil

extends java.lang.Object

Provides a set of utility static methods for use by the EPP Codec classes.

Field Summary
`static java.lang.String` | `DATE_FORMAT` Format used for the XML Schema date data type.
`static java.lang.String` | `DEFAULT_TIME_INSTANT_FORMAT` Default format used for the XML Schema `dateTime` data type

Constructor Summary
`EPPUtil()`

Method Summary
`static void` | `appendChildren(org.w3c.dom.Element aSource, org.w3c.dom.Element aDest)` Appends the children Nodes of `aSource` as children nodes of `aDest`.
`static java.lang.String` | `collapseWhitespace(java.lang.String inString)` Collapse Whitespace, which means that all leading and trailing whitespace will be stripped, and all internal whitespace collapsed to single space characters.
`static java.math.BigDecimal` | `decodeBigDecimal(org.w3c.dom.Element aElement)` Decode `BigDecimal`, from an XML Element.
`static java.math.BigDecimal` | `decodeBigDecimal(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode `BigDecimal`, by XML namespace and tag name, from an XML Element.
`static java.lang.Boolean` | `decodeBoolean(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode `Boolean`, by XML namespace and tag name, from an XML Element.
`static boolean` | `decodeBooleanAttr(org.w3c.dom.Element aElement, java.lang.String aAttr)` Decodes a boolean attribute value given the `Element` and attribute name.
`static EPPCodecComponent` | `decodeComp(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName, java.lang.Class aClass)` Decode a `EPPCodecComponent`, by XML namespace and tag name, from an XML Element.
`static java.util.List` | `decodeCompList(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName, java.lang.Class aClass)` Decode a `List` of `EPPCodecComponent`'s, by XML namespace and tag name, from an XML Element.
`static java.util.Vector` | `decodeCompVector(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName, java.lang.Class aClass)` Decode a `Vector` of `EPPCodecComponent`'s, by XML namespace and tag name, from an XML Element.
`static java.util.Date` | `decodeDate(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode `Date`, by XML namespace and tag name, from an XML Element.
`static java.util.Date` | `decodeDate(java.lang.String aDateValue)` Decode an XML Schema date data type (YYYY-MM-DD) to a Java Date object.
`static java.lang.Integer` | `decodeInteger(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode `Integer`, by XML namespace and tag name, from an XML Element.
`static java.util.List` | `decodeIntegerList(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode a `List` of `Integer`'s by XML namespace and tag name, from an XML Element.
`static java.util.List` | `decodeList(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode a `List` of `String`'s by XML namespace and tag name, from an XML Element.
`static java.lang.String` | `decodeString(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode `String`, by XML namespace and tag name, from an XML Element.
`static java.util.Date` | `decodeTimeInstant(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode `Date`, as date and time, by XML namespace and tag name, from an XML Element.
`static java.util.Date` | `decodeTimeInstant(java.lang.String aTimeInstant)` Decode an XML Schema timeInstant data type to a Java Date object.
`static java.util.Vector` | `decodeVector(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Decode a `Vector` of `String`'s by XML namespace and tag name, from an XML Element.
`static java.lang.String` | `encodeBase64(org.w3c.dom.Element aElement)` Base64 encode the XML `Element` tree.
`static void` | `encodeBigDecimal(org.w3c.dom.Document aDocument, org.w3c.dom.Element aElement, java.math.BigDecimal aBigDecimal, java.lang.String aFormat)` Encode a `Double` in XML with a given XML namespace and tag name.
`static void` | `encodeBigDecimal(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.math.BigDecimal aBigDecimal, java.lang.String aNS, java.lang.String aTagName, java.lang.String aFormat)` Encode a `Double` in XML with a given XML namespace and tag name.
`static void` | `encodeBoolean(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.lang.Boolean aBoolean, java.lang.String aNS, java.lang.String aTagName)` Encode a `Boolean` in XML with a given XML namespace and tag name.
`static void` | `encodeBooleanAttr(org.w3c.dom.Element aElement, java.lang.String aAttr, boolean aVal)` Encodes a boolean `Element` attribute value.
`static void` | `encodeComp(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, EPPCodecComponent aComp)` Encode a `EPPCodecComponent` instance in XML.
`static void` | `encodeCompList(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.List aList)` Encode a `List` of `EPPCodecComponent`'s in XML.
`static void` | `encodeCompVector(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.Vector aVector)` Encode a `Vector` of `EPPCodecComponent`'s in XML.
`static java.lang.String` | `encodeDate(java.util.Date aDate)` Encode a Java Date into an XML Schema date data type string.
`static void` | `encodeDate(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.Date aDate, java.lang.String aNS, java.lang.String aTagName)` Encode a `Date` in XML with a given XML namespace and tag name.
`static void` | `encodeIntegerList(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.List aList, java.lang.String aNS, java.lang.String aTagName)` Encode a `List` of `Integer`'s in XML with a given XML namespace and tag name.
`static void` | `encodeList(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.List aList, java.lang.String aNS, java.lang.String aTagName)` Encode a `List` of `String`'s in XML with a given XML namespace and tag name.
`static void` | `encodeNill(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.lang.String aNS, java.lang.String aTagName)` DOCUMENT ME!
`static void` | `encodeString(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.lang.String aString, java.lang.String aNS, java.lang.String aTagName)` Encode a `String` in XML with a given XML namespace and tag name.
`static void` | `encodeStringList(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.List aList, java.lang.String aNS, java.lang.String aTagName)`
`static java.lang.String` | `encodeTimeInstant(java.util.Date aDate)` Encode a Java Date into an XML Schema timeInstant data type string.
`static void` | `encodeTimeInstant(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.Date aDate, java.lang.String aNS, java.lang.String aTagName)` Encode a `Date`, as date and time, in XML with a given XML namespace and tag name.
`static void` | `encodeVector(org.w3c.dom.Document aDocument, org.w3c.dom.Element aRoot, java.util.Vector aVector, java.lang.String aNS, java.lang.String aTagName)` Encode a `Vector` of `String`'s in XML with a given XML namespace and tag name.
`static boolean` | `equalLists(java.util.List aV1, java.util.List aV2)` compares two `List` instances.
`static boolean` | `equalVectors(java.util.Vector aV1, java.util.Vector aV2)` compares two `Vector` instances.
`static org.w3c.dom.Element` | `getElementByTagNameNS(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Gets the first direct child element with a given tag name and XML namespace.
`static java.util.Vector` | `getElementsByTagNameNS(org.w3c.dom.Element aElement, java.lang.String aNS, java.lang.String aTagName)` Gets all of the direct child element with a given tag name and XML namespace.
`static org.w3c.dom.Element` | `getFirstElementChild(org.w3c.dom.Element aElement)` Gets the first DOM Element Node of the `aElement` DOM Element.
`static java.lang.String` | `getLocalName(java.lang.String aQualifiedName)` Gets the local name given the qualified element name.
`static org.w3c.dom.Element` | `getNextElementSibling(org.w3c.dom.Element aElement)` Gets the next sibling Element of a provided Element.
`static java.lang.String` | `getPrefix(java.lang.String aQualifiedName)` Gets the namespace prefix given a qualified name.
`static java.lang.String` | `getTextContent(org.w3c.dom.Node node)` A pass-thru to the getTextContent() method using a default value of false for the required flag.
`static java.lang.String` | `getTextContent(org.w3c.dom.Node node, boolean allowEmpty)` Return the text data within an XML tag.
`static java.lang.String` | `getTimeInstantFormat()` Gets the XML Schema `timeDate` format used in `and #encodeTimeInstant(Document, Element, Date, String, String)`.
`static boolean` | `listSubset(java.util.List aV1, java.util.List aV2)` Determines if one `List` is a subset of another `List`.
`static java.lang.String` | `removeWhitespace(java.lang.String inString)` Remove Whitespace, which means that all whitespace will be stripped.
`static void` | `setTimeInstantFormat(java.lang.String aTimeInstantFormat)` Sets the XML Schema `timeDate` format used in `and #encodeTimeInstant(Document, Element, Date, String, String)`.
`static java.lang.String` | `toString(org.w3c.dom.Element aElement)` Converts an `aElement` to a `String` for printing.
`static java.lang.String` | `toString(EPPCodecComponent aComponent)` Converts an `EPPCodecComponent` to a `String` for printing.
`static java.lang.String` | `toStringNoIndent(org.w3c.dom.Element aElement)` Converts an `aElement` to a `String` for printing without pretty printing.
`static boolean` | `vectorSubset(java.util.Vector aV1, java.util.Vector aV2)` Determines if one `Vector` is a subset of another `Vector`.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### DEFAULT_TIME_INSTANT_FORMAT

    public static final java.lang.String DEFAULT_TIME_INSTANT_FORMAT

  Default format used for the XML Schema `dateTime` data type

  See Also:
    Constant Field Values

### DATE_FORMAT

    public static final java.lang.String DATE_FORMAT

  Format used for the XML Schema date data type.

  See Also:
    Constant Field Values

Constructor Detail

### EPPUtil

    public EPPUtil()

Method Detail

### getTimeInstantFormat

    public static java.lang.String getTimeInstantFormat()

  Gets the XML Schema `timeDate` format used in `and #encodeTimeInstant(Document, Element, Date, String, String)`. The defauLt format is defined by the constant `DEFAULT_TIME_INSTANT_FORMAT` and it can be overridden using the `setTimeInstantFormat(String)` method.

  Returns:
    XML Schema `timeDate` format used in `and #encodeTimeInstant(Document, Element, Date, String, String)`.

### setTimeInstantFormat

    public static void setTimeInstantFormat(java.lang.String aTimeInstantFormat)

  Sets the XML Schema `timeDate` format used in `and #encodeTimeInstant(Document, Element, Date, String, String)`. The format must follow the format supported by `SimpleDateFormat`.

  Parameters:
    `aTimeInstantFormat` - XML Schema `timeDate` format supported by `SimpleDateFormat`.

### appendChildren

    public static void appendChildren(org.w3c.dom.Element aSource,
                                      org.w3c.dom.Element aDest)

  Appends the children Nodes of `aSource` as children nodes of `aDest`.

  Parameters:
    `aSource` - Source Element tree to get children from
    `aDest` - Destination Element to append `aSource` children.

### decodeBigDecimal

    public static java.math.BigDecimal decodeBigDecimal(org.w3c.dom.Element aElement,
                                                        java.lang.String aNS,
                                                        java.lang.String aTagName)
                                                 throws EPPDecodeException

  Decode `BigDecimal`, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. The first XML element found will be decoded and returned. If no element is found, `null` is returned.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:create>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
  Returns:
    `BigDecimal` value if found; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeBigDecimal

    public static java.math.BigDecimal decodeBigDecimal(org.w3c.dom.Element aElement)
                                                 throws EPPDecodeException

  Decode `BigDecimal`, from an XML Element. The `aElement` element will be decoded and returned. If element is `null`, `null` is returned.

  Parameters:
    `aElement` - XML Element to decode.
  Returns:
    `BigDecimal` value if `aElement` is not `null`; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeBoolean

    public static java.lang.Boolean decodeBoolean(org.w3c.dom.Element aElement,
                                                  java.lang.String aNS,
                                                  java.lang.String aTagName)
                                           throws EPPDecodeException

  Decode `Boolean`, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. The first XML element found will be decoded and returned. If no element is found, `null` is returned.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:create>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
  Returns:
    `Boolean` value if found; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeBooleanAttr

    public static boolean decodeBooleanAttr(org.w3c.dom.Element aElement,
                                            java.lang.String aAttr)
                                     throws EPPDecodeException

  Decodes a boolean attribute value given the `Element` and attribute name.

  Parameters:
    `aElement` - Element with the attribute to look for
    `aAttr` - Attribute name
  Returns:
    Decoded boolean value
  Throws:
    `EPPDecodeException` - Cound not find attribute or the attribute value is not a valid boolean value

### decodeComp

    public static EPPCodecComponent decodeComp(org.w3c.dom.Element aElement,
                                               java.lang.String aNS,
                                               java.lang.String aTagName,
                                               java.lang.Class aClass)
                                        throws EPPDecodeException

  Decode a `EPPCodecComponent`, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. There first XML element found will be used to initial and instance of `aClass`.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:update>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name servers is "domain:server".
    `aClass` - Class to instantiate for a found XML element. This must be a class that implements `EPPCodecComponent`
  Returns:
    Instance of `aClass` that represents the found XML elements if found; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeCompList

    public static java.util.List decodeCompList(org.w3c.dom.Element aElement,
                                                java.lang.String aNS,
                                                java.lang.String aTagName,
                                                java.lang.Class aClass)
                                         throws EPPDecodeException

  Decode a `List` of `EPPCodecComponent`'s, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. Each XML element found will result in the instantiation of `aClass`, which will decode the associated XML element and added to the returned `List`.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:add>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the contact elements of >domain:add> is "domain:contact".
    `aClass` - Class to instantiate for each found XML element. This must be a class that implements `EPPCodecComponent`
  Returns:
    `List` of `EPPCodecComponent` elements representing the found XML elements.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeCompVector

    public static java.util.Vector decodeCompVector(org.w3c.dom.Element aElement,
                                                    java.lang.String aNS,
                                                    java.lang.String aTagName,
                                                    java.lang.Class aClass)
                                             throws EPPDecodeException

  Decode a `Vector` of `EPPCodecComponent`'s, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. Each XML element found will result in the instantiation of `aClass`, which will decode the associated XML element and added to the returned `Vector`.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:add>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the contact elements of >domain:add> is "domain:contact".
    `aClass` - Class to instantiate for each found XML element. This must be a class that implements `EPPCodecComponent`
  Returns:
    `Vector` of `EPPCodecComponent` elements representing the found XML elements.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeDate

    public static java.util.Date decodeDate(org.w3c.dom.Element aElement,
                                            java.lang.String aNS,
                                            java.lang.String aTagName)
                                     throws EPPDecodeException

  Decode `Date`, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. The first XML element found will be decoded and returned. If no element is found, `null` is returned. The format used for decoding the date is defined by the constant `EPPUtil.DATE_FORMAT`.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <trans-id>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:epp".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the transaction Id date is "date".
  Returns:
    `Date` value if found; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeDate

    public static java.util.Date decodeDate(java.lang.String aDateValue)

  Decode an XML Schema date data type (YYYY-MM-DD) to a Java Date object.

  Parameters:
    `aDateValue` - XML Schema date data type string (YYYY-MM-DD).
  Returns:
    Java Date object.

### decodeInteger

    public static java.lang.Integer decodeInteger(org.w3c.dom.Element aElement,
                                                  java.lang.String aNS,
                                                  java.lang.String aTagName)
                                           throws EPPDecodeException

  Decode `Integer`, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. The first XML element found will be decoded and returned. If no element is found, `null` is returned.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:create>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
  Returns:
    `Integer` value if found; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeList

    public static java.util.List decodeList(org.w3c.dom.Element aElement,
                                            java.lang.String aNS,
                                            java.lang.String aTagName)
                                     throws EPPDecodeException

  Decode a `List` of `String`'s by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. Each XML element found will be decoded and added to the returned `List`. Empty child elements, will result in empty string ("") return `List` elements.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:update>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name servers is "domain:server".
  Returns:
    `List` of `String` elements representing the text nodes of the found XML elements.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeString

    public static java.lang.String decodeString(org.w3c.dom.Element aElement,
                                                java.lang.String aNS,
                                                java.lang.String aTagName)
                                         throws EPPDecodeException

  Decode `String`, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. The first XML element found will be decoded and returned. If no element is found, `null` is returned.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:create>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
  Returns:
    `String` value if found; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeTimeInstant

    public static java.util.Date decodeTimeInstant(org.w3c.dom.Element aElement,
                                                   java.lang.String aNS,
                                                   java.lang.String aTagName)
                                            throws EPPDecodeException

  Decode `Date`, as date and time, by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. The first XML element found will be decoded and returned. If no element is found, `null` is returned. The format used for decoding the date is defined by the constant `EPPUtil.TIME_INSTANT_FORMAT`.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <trans-id>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:epp".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the transaction Id date is "date".
  Returns:
    `Date` value as date and time if found; `null` otherwise.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### decodeTimeInstant

    public static java.util.Date decodeTimeInstant(java.lang.String aTimeInstant)

  Decode an XML Schema timeInstant data type to a Java Date object.

  Parameters:
    `aTimeInstant` - XML Schema timeInstant data type string.
  Returns:
    Java Date object if `aTimeInstant` format is valid; `null` otherwise

### decodeVector

    public static java.util.Vector decodeVector(org.w3c.dom.Element aElement,
                                                java.lang.String aNS,
                                                java.lang.String aTagName)
                                         throws EPPDecodeException

  Decode a `Vector` of `String`'s by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. Each XML element found will be decoded and added to the returned `Vector`. Empty child elements, will result in empty string ("") return `Vector` elements.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:update>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name servers is "domain:server".
  Returns:
    `Vector` of `String` elements representing the text nodes of the found XML elements.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### encodeBigDecimal

    public static void encodeBigDecimal(org.w3c.dom.Document aDocument,
                                        org.w3c.dom.Element aRoot,
                                        java.math.BigDecimal aBigDecimal,
                                        java.lang.String aNS,
                                        java.lang.String aTagName,
                                        java.lang.String aFormat)
                                 throws EPPEncodeException

  Encode a `Double` in XML with a given XML namespace and tag name. Takes an optional argument for the format of the Double, if not provided then it uses #0.00 which formats the double to 2 decimal places.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aBigDecimal` - `Double` to add.
    `aNS` - XML namespace of the element. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
    `aFormat` - Format to use following the `DecimalFormat` format. If `null` is passed, the default format of "#0.00" is used.
  Throws:
    `EPPEncodeException` - Error encoding the `Double`.

### encodeBigDecimal

    public static void encodeBigDecimal(org.w3c.dom.Document aDocument,
                                        org.w3c.dom.Element aElement,
                                        java.math.BigDecimal aBigDecimal,
                                        java.lang.String aFormat)
                                 throws EPPEncodeException

  Encode a `Double` in XML with a given XML namespace and tag name. Takes an optional argument for the format of the Double, if not provided then it uses #0.00 which formats the double to 2 decimal places.

  Parameters:
    `aElement` - XML Element to add the text node encoded with the `BigDecimal` value.
    `aBigDecimal` - `Double` to encode into the text node of the element.
    `aFormat` - Format to use following the `DecimalFormat` format. If `null` is passed, the default format of "#0.00" is used.
  Throws:
    `EPPEncodeException` - Error encoding the `Double`.

### encodeBoolean

    public static void encodeBoolean(org.w3c.dom.Document aDocument,
                                     org.w3c.dom.Element aRoot,
                                     java.lang.Boolean aBoolean,
                                     java.lang.String aNS,
                                     java.lang.String aTagName)
                              throws EPPEncodeException

  Encode a `Boolean` in XML with a given XML namespace and tag name. If aBoolean is `null` an element is not added.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aBoolean` - `Boolean` to add.
    `aNS` - XML namespace of the element. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
  Throws:
    `EPPEncodeException` - Error encoding the `Boolean`.

### encodeBooleanAttr

    public static void encodeBooleanAttr(org.w3c.dom.Element aElement,
                                         java.lang.String aAttr,
                                         boolean aVal)

  Encodes a boolean `Element` attribute value. The attribute is set to "1" with a value of `true` and is set to "0" with a value of `false`.

  Parameters:
    `aElement` - Element to add attribute to
    `aAttr` - Attribute name
    `aVal` - Attribute boolean value

### encodeComp

    public static void encodeComp(org.w3c.dom.Document aDocument,
                                  org.w3c.dom.Element aRoot,
                                  EPPCodecComponent aComp)
                           throws EPPEncodeException

  Encode a `EPPCodecComponent` instance in XML. The component is first checked for not being `null`, than it will be appended as a child of `aRoot`.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add to. For example, the root node could be <domain:update>
    `aComp` - `EPPCodecComponent's` to add.
  Throws:
    `EPPEncodeException` - Error encoding `EPPCodecComponent`.

### encodeCompList

    public static void encodeCompList(org.w3c.dom.Document aDocument,
                                      org.w3c.dom.Element aRoot,
                                      java.util.List aList)
                               throws EPPEncodeException

  Encode a `List` of `EPPCodecComponent`'s in XML. Each `aList` element will be encoded and added to `aRoot`.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aList` - `List` of `EPPCodecComponent's` to add.
  Throws:
    `EPPEncodeException` - Error encoding the `List` of `EPPCodecComponent`'s.

### encodeCompVector

    public static void encodeCompVector(org.w3c.dom.Document aDocument,
                                        org.w3c.dom.Element aRoot,
                                        java.util.Vector aVector)
                                 throws EPPEncodeException

  Encode a `Vector` of `EPPCodecComponent`'s in XML. Each `aVector` element will be encoded and added to `aRoot`.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aVector` - `Vector` of `EPPCodecComponent's` to add.
  Throws:
    `EPPEncodeException` - Error encoding the `Vector` of `EPPCodecComponent`'s.

### encodeDate

    public static java.lang.String encodeDate(java.util.Date aDate)

  Encode a Java Date into an XML Schema date data type string.

  Parameters:
    `aDate` - Java Date to encode into a XML Schema date data type string.
  Returns:
    Encoded XML Schema date data type string.

### encodeDate

    public static void encodeDate(org.w3c.dom.Document aDocument,
                                  org.w3c.dom.Element aRoot,
                                  java.util.Date aDate,
                                  java.lang.String aNS,
                                  java.lang.String aTagName)
                           throws EPPEncodeException

  Encode a `Date` in XML with a given XML namespace and tag name. The format used for encoding the date is defined by the constant `EPPUtil.DATE_FORMAT`.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aDate` - `Date` to add.
    `aNS` - XML namespace of the element. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
  Throws:
    `EPPEncodeException` - Error encoding `Date`.

### encodeList

    public static void encodeList(org.w3c.dom.Document aDocument,
                                  org.w3c.dom.Element aRoot,
                                  java.util.List aList,
                                  java.lang.String aNS,
                                  java.lang.String aTagName)
                           throws EPPEncodeException

  Encode a `List` of `String`'s in XML with a given XML namespace and tag name.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aList` - `List` of `String's` to add.
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name servers is "domain:server".
  Throws:
    `EPPEncodeException` - Error encoding the `List` of `String`'s.

### encodeNill

    public static void encodeNill(org.w3c.dom.Document aDocument,
                                  org.w3c.dom.Element aRoot,
                                  java.lang.String aNS,
                                  java.lang.String aTagName)
                           throws EPPEncodeException

  DOCUMENT ME!

  Parameters:
    `aDocument` - DOCUMENT ME!
    `aRoot` - DOCUMENT ME!
    `aNS` - DOCUMENT ME!
    `aTagName` - DOCUMENT ME!
  Throws:
    `EPPEncodeException` - DOCUMENT ME!

### encodeString

    public static void encodeString(org.w3c.dom.Document aDocument,
                                    org.w3c.dom.Element aRoot,
                                    java.lang.String aString,
                                    java.lang.String aNS,
                                    java.lang.String aTagName)
                             throws EPPEncodeException

  Encode a `String` in XML with a given XML namespace and tag name.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aString` - `String` to add.
    `aNS` - XML namespace of the element. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name is "domain:name".
  Throws:
    `EPPEncodeException` - Error encoding the `String`.

### encodeStringList

    public static void encodeStringList(org.w3c.dom.Document aDocument,
                                        org.w3c.dom.Element aRoot,
                                        java.util.List aList,
                                        java.lang.String aNS,
                                        java.lang.String aTagName)

### encodeTimeInstant

    public static java.lang.String encodeTimeInstant(java.util.Date aDate)

  Encode a Java Date into an XML Schema timeInstant data type string. The XML Schema timeInstant data type string has the following format: CCYY-MM-DDThh:mm:ss.ssss can be followed by a Z to indicate Coordinated Universal Time

  Parameters:
    `aDate` - Java Date to encode into a XML Schema timeInstant data type string.
  Returns:
    Encoded XML Schema timeInstant data type string.

### encodeTimeInstant

    public static void encodeTimeInstant(org.w3c.dom.Document aDocument,
                                         org.w3c.dom.Element aRoot,
                                         java.util.Date aDate,
                                         java.lang.String aNS,
                                         java.lang.String aTagName)
                                  throws EPPEncodeException

  Encode a `Date`, as date and time, in XML with a given XML namespace and tag name. The format used for encoding the date is defined by the constant `EPPUtil.TIME_INSTANT_FORMAT`.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:expire-data>
    `aDate` - `Date` as date and time to add.
    `aNS` - XML namespace of the element. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain expiration date and time is "domain:expiration-date".
  Throws:
    `EPPEncodeException` - Error encoding `Date`.

### encodeVector

    public static void encodeVector(org.w3c.dom.Document aDocument,
                                    org.w3c.dom.Element aRoot,
                                    java.util.Vector aVector,
                                    java.lang.String aNS,
                                    java.lang.String aTagName)
                             throws EPPEncodeException

  Encode a `Vector` of `String`'s in XML with a given XML namespace and tag name.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aVector` - `Vector` of `String's` to add.
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name servers is "domain:server".
  Throws:
    `EPPEncodeException` - Error encoding the `Vector` of `String`'s.

### equalLists

    public static boolean equalLists(java.util.List aV1,
                                     java.util.List aV2)

  compares two `List` instances. The Java 1.1 `List` class does not implement the `equals` methods, so `equalLists` was written to implement `equals` of two `Lists` (aV1 and aV2). This method is not need for Java 2.

  Parameters:
    `aV1` - First List instance to compare.
    `aV2` - Second List instance to compare.
  Returns:
    `true` if List's are equal; `false` otherwise.

### equalVectors

    public static boolean equalVectors(java.util.Vector aV1,
                                       java.util.Vector aV2)

  compares two `Vector` instances. The Java 1.1 `Vector` class does not implement the `equals` methods, so `equalVectors` was written to implement `equals` of two `Vectors` (aV1 and aV2). This method is not need for Java 2.

  Parameters:
    `aV1` - First Vector instance to compare.
    `aV2` - Second Vector instance to compare.
  Returns:
    `true` if Vector's are equal; `false` otherwise.

### getElementByTagNameNS

    public static org.w3c.dom.Element getElementByTagNameNS(org.w3c.dom.Element aElement,
                                                            java.lang.String aNS,
                                                            java.lang.String aTagName)

  Gets the first direct child element with a given tag name and XML namespace.

  Parameters:
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name to scan for.
  Returns:
    Matching `Element` if found; `null` otherwise.

### getElementsByTagNameNS

    public static java.util.Vector getElementsByTagNameNS(org.w3c.dom.Element aElement,
                                                          java.lang.String aNS,
                                                          java.lang.String aTagName)

  Gets all of the direct child element with a given tag name and XML namespace.

  Parameters:
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name to scan for.
  Returns:
    `Vector` of `Node` instances that are elements and have the specified tag name and XML namespace.

### getLocalName

    public static java.lang.String getLocalName(java.lang.String aQualifiedName)

  Gets the local name given the qualified element name. If the local name is passed, it will be simply returned back.R

  Parameters:
    `aQualifiedName` - Qualified name of the element like `domain:name`. A localhost like `name` can be passed without error.
  Returns:
    Localname of the qualified name

### getPrefix

    public static java.lang.String getPrefix(java.lang.String aQualifiedName)

  Gets the namespace prefix given a qualified name. If no prefix is found, empty string is returned.

  Parameters:
    `aQualifiedName` - Qualified name of the element like `domain:name`.
  Returns:
    Namespace prefix of the qualified name if found; empty string ("") if not found.

### getFirstElementChild

    public static org.w3c.dom.Element getFirstElementChild(org.w3c.dom.Element aElement)

  Gets the first DOM Element Node of the `aElement` DOM Element.

  Parameters:
    `aElement` - Element to scan for the first element.
  Returns:
    Found DOM Element Node if found; `null` otherwise.

### getNextElementSibling

    public static org.w3c.dom.Element getNextElementSibling(org.w3c.dom.Element aElement)

  Gets the next sibling Element of a provided Element.

  Parameters:
    `aElement` - Element to start scan for the next Element.
  Returns:
    Found DOM Element Node if found; `null` otherwise.

### getTextContent

    public static java.lang.String getTextContent(org.w3c.dom.Node node)
                                           throws EPPDecodeException

  A pass-thru to the getTextContent() method using a default value of false for the required flag.

  Throws:
    `EPPDecodeException`

### getTextContent

    public static java.lang.String getTextContent(org.w3c.dom.Node node,
                                                  boolean allowEmpty)
                                           throws EPPDecodeException

  Return the text data within an XML tag.
  12345 yields the String "12345"
  If the node==null, child==null, value==null, or value=="" => Exception
  UNLESS allowEmpty, in which case return ""

  For reference:
  <tag></tag> => child is null
  <tag/> => child is null
  <tag> </tag> => value is empty

  Throws:
    `EPPDecodeException`

### listSubset

    public static boolean listSubset(java.util.List aV1,
                                     java.util.List aV2)

  Determines if one `List` is a subset of another `List`. If every element in `aV1` is in `aV2` return `true`; otherwise return `false`.

  Parameters:
    `aV1` - Subset `List` to compare against `aV2`
    `aV2` - Superset `List` to compare against `aV1`
  Returns:
    `true` if `aV1` is a subset of `aV2`; `false` otherwise.

### toString

    public static java.lang.String toString(EPPCodecComponent aComponent)

  Converts an `EPPCodecComponent` to a `String` for printing. Each `EPPCodecComponent` can use this utility method to implement `Object.toString()`.

  Parameters:
    `aComponent` - a concrete `EPPCodecComponent` instance
  Returns:
    `String` representation of `EPPCodecComponent` if successful; "ERROR" `String` otherwise.

### toString

    public static java.lang.String toString(org.w3c.dom.Element aElement)

  Converts an `aElement` to a `String` for printing.

  Parameters:
    `aElement` - `Element` to print
  Returns:
    `String` representation of `Element` if successful; "ERROR" `String` otherwise.

### toStringNoIndent

    public static java.lang.String toStringNoIndent(org.w3c.dom.Element aElement)

  Converts an `aElement` to a `String` for printing without pretty printing.

  Parameters:
    `aElement` - `Element` to print
  Returns:
    `String` representation of `Element` if successful; "ERROR" `String` otherwise.

### vectorSubset

    public static boolean vectorSubset(java.util.Vector aV1,
                                       java.util.Vector aV2)

  Determines if one `Vector` is a subset of another `Vector`. If every element in `aV1` is in `aV2` return `true`; otherwise return `false`.

  Parameters:
    `aV1` - Subset `Vector` to compare against `aV2`
    `aV2` - Superset `Vector` to compare against `aV1`
  Returns:
    `true` if `aV1` is a subset of `aV2`; `false` otherwise.

### decodeIntegerList

    public static java.util.List decodeIntegerList(org.w3c.dom.Element aElement,
                                                   java.lang.String aNS,
                                                   java.lang.String aTagName)
                                            throws EPPDecodeException

  Decode a `List` of `Integer`'s by XML namespace and tag name, from an XML Element. The children elements of `aElement` will be searched for the specified `aNS` namespace URI and the specified `aTagName`. Each XML element found will be decoded and added to the returned `List`. Empty child elements, will result in an `EPPDecodeException`.

  Parameters:
    `aElement` - XML Element to scan. For example, the element could be <domain:update>
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name servers is "domain:server".
  Returns:
    `List` of `Integer` elements representing the text nodes of the found XML elements.
  Throws:
    `EPPDecodeException` - Error decoding `aElement`.

### encodeIntegerList

    public static void encodeIntegerList(org.w3c.dom.Document aDocument,
                                         org.w3c.dom.Element aRoot,
                                         java.util.List aList,
                                         java.lang.String aNS,
                                         java.lang.String aTagName)
                                  throws EPPEncodeException

  Encode a `List` of `Integer`'s in XML with a given XML namespace and tag name.

  Parameters:
    `aDocument` - DOM Document of `aRoot`. This parameter also acts as a factory for XML elements.
    `aRoot` - XML Element to add children nodes to. For example, the root node could be <domain:update>
    `aList` - `List` of `Integer`'s to add.
    `aNS` - XML namespace of the elements. For example, for domain element this is "urn:iana:xmlns:domain".
    `aTagName` - Tag name of the element including an optional namespace prefix. For example, the tag name for the domain name servers is "domain:server".
  Throws:
    `EPPEncodeException` - Error encoding the `List` of `Integer`'s.

### collapseWhitespace

    public static java.lang.String collapseWhitespace(java.lang.String inString)

  Collapse Whitespace, which means that all leading and trailing whitespace will be stripped, and all internal whitespace collapsed to single space characters. Intended to emulate XML Schema whitespace (collapse) constraining facet: http://www.w3.org/TR/xmlschema-2/#rf-whiteSpace

  Parameters:
    `inString` - `String` to be collapsed
  Returns:
    `String` with whitespace collapsed, or null when result is empty

### removeWhitespace

    public static java.lang.String removeWhitespace(java.lang.String inString)

  Remove Whitespace, which means that all whitespace will be stripped.

  Parameters:
    `inString` - `String` from which to remove whitespace
  Returns:
    `String` with whitespace removed, or null when result is empty

### encodeBase64

    public static java.lang.String encodeBase64(org.w3c.dom.Element aElement)
                                         throws java.lang.Exception

  Base64 encode the XML `Element` tree.

  Parameters:
    `aElement` - Root element to encode in Base64
  Returns:
    Base64 encoded value of the XML `Element` tree.
  Throws:
    `java.lang.Exception` - Error encoding the `Element`

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