org.eclipse.rdf4j.common.xml

## Class XMLUtil

- java.lang.Object
- - org.eclipse.rdf4j.common.xml.XMLUtil

-     public class XMLUtil
      extends Object

  Utility methods for handling and processing XML data.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `XMLUtil()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static String` | `escapeAttributeValue(String value)` Escapes all characters that have a special meaning in XML attribute values -- i.e.
    `static String` | `escapeCharacterData(String text)` Escapes any special characters in the supplied text so that it can be included as character data in an XML document.
    `static String` | `escapeDoubleQuotedAttValue(String value)` Escapes any special characters in the supplied value so that it can be used as an double-quoted attribute value in an XML document.
    `static String` | `escapeSingleQuotedAttValue(String value)` Escapes any special characters in the supplied value so that it can be used as an single-quoted attribute value in an XML document.
    `static String` | `escapeText(String text)` Escapes all characters that have a special meaning in XML text -- i.e.
    `static int` | `findURISplitIndex(String uri)` Tries to find a point in the supplied URI where this URI can be safely split into a namespace part and a local name.
    `static boolean` | `isCombiningChar(char c)`
    `static boolean` | `isDigit(char c)`
    `static boolean` | `isExtender(char c)`
    `static boolean` | `isIdeographic(char c)`
    `static boolean` | `isLetter(char c)`
    `static boolean` | `isNCName(String name)` Checks whether the supplied String is an NCName (Namespace Classified Name) as specified at http://www.w3.org/TR/REC-xml-names/#NT-NCName .
    `static boolean` | `isNCNameChar(char c)`
    `static boolean` | `isNCNameStartChar(char c)`
    `static boolean` | `isValidCharacterDataChar(char c)` Returns whether the specified character can appear in XML character data.
    `static boolean` | `isValidCharacterDataChar(int c)` Returns whether the specified character can appear in XML character data.
    `static String` | `removeInvalidCharacterDataChars(String s)` Removes all non-valid XML character data chars from the specified String.
    `static String` | `resolveEntities(String text)` Replaces all XML character entities with the character they represent.
    `static String` | `resolveEntity(String entName)` Resolves an entity reference or character reference to its value.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### XMLUtil

          public XMLUtil()

  - ### Method Detail

    - #### escapeCharacterData

          public static String escapeCharacterData(String text)

      Escapes any special characters in the supplied text so that it can be included as character data in an XML document. The characters that are escaped are `&`, `<`, `>` and `carriage return (\r)`.

    - #### escapeDoubleQuotedAttValue

          public static String escapeDoubleQuotedAttValue(String value)

      Escapes any special characters in the supplied value so that it can be used as an double-quoted attribute value in an XML document. The characters that are escaped are `&`, `<`, `>`, `tab (\t)`, `carriage return (\r)`, `line feed (\n)` and `"` .

    - #### escapeSingleQuotedAttValue

          public static String escapeSingleQuotedAttValue(String value)

      Escapes any special characters in the supplied value so that it can be used as an single-quoted attribute value in an XML document. The characters that are escaped are `&`, `<`, `>`, `tab (\t)`, `carriage return (\r)`, `line feed (\n)` and `'` .

    - #### resolveEntities

          public static String resolveEntities(String text)

      Replaces all XML character entities with the character they represent.

    - #### resolveEntity

          public static String resolveEntity(String entName)

      Resolves an entity reference or character reference to its value.
      Parameters:
        `entName` - The 'name' of the reference. This is the string between & and ;, e.g. amp, quot, #65 or #x41.
      Returns:
        The value of the supplied reference, or the reference itself if it could not be resolved.

    - #### findURISplitIndex

          public static int findURISplitIndex(String uri)

      Tries to find a point in the supplied URI where this URI can be safely split into a namespace part and a local name. According to the XML specifications, a local name must start with a letter or underscore and can be followed by zero or more 'NCName' characters.
      Parameters:
        `uri` - The URI to split.
      Returns:
        The index of the first character of the local name, or `-1` if the URI can not be split into a namespace and local name.

    - #### isNCName

          public static final boolean isNCName(String name)

      Checks whether the supplied String is an NCName (Namespace Classified Name) as specified at http://www.w3.org/TR/REC-xml-names/#NT-NCName .

    - #### isNCNameStartChar

          public static final boolean isNCNameStartChar(char c)

    - #### isNCNameChar

          public static final boolean isNCNameChar(char c)

    - #### escapeAttributeValue

          public static String escapeAttributeValue(String value)

      Escapes all characters that have a special meaning in XML attribute values -- i.e. &, <, >, " and ' -- with their entities.
      See Also:
        `resolveEntities(java.lang.String)`

    - #### escapeText

          public static String escapeText(String text)

      Escapes all characters that have a special meaning in XML text -- i.e. &, < and > -- with their entities.
      See Also:
        `resolveEntities(java.lang.String)`

    - #### isValidCharacterDataChar

          public static boolean isValidCharacterDataChar(char c)

      Returns whether the specified character can appear in XML character data.

    - #### isValidCharacterDataChar

          public static boolean isValidCharacterDataChar(int c)

      Returns whether the specified character can appear in XML character data. The integer encoding also makes the representation of supplementary Unicode characters possible.

    - #### removeInvalidCharacterDataChars

          public static String removeInvalidCharacterDataChars(String s)

      Removes all non-valid XML character data chars from the specified String. If all characters are valid character data chars, this method will return the same String.

    - #### isLetter

          public static final boolean isLetter(char c)

    - #### isIdeographic

          public static final boolean isIdeographic(char c)

    - #### isCombiningChar

          public static final boolean isCombiningChar(char c)

    - #### isDigit

          public static final boolean isDigit(char c)

    - #### isExtender

          public static final boolean isExtender(char c)

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