Xerces2 Implementation: Class XMLDTDDescription

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## org.apache.xerces.impl.dtd
Class XMLDTDDescription

    java.lang.Object
      |
      +--org.apache.xerces.util.XMLResourceIdentifierImpl
            |
            +--org.apache.xerces.impl.dtd.XMLDTDDescription

All Implemented Interfaces:
  org.apache.xerces.xni.grammars.XMLDTDDescription, org.apache.xerces.xni.grammars.XMLGrammarDescription, org.apache.xerces.xni.XMLResourceIdentifier

public class XMLDTDDescription
extends XMLResourceIdentifierImpl
implements org.apache.xerces.xni.grammars.XMLDTDDescription

All information specific to DTD grammars.

# INTERNAL:

  Usage of this class is not supported. It may be altered or removed at any time.

Version:
  $Id: XMLDTDDescription.java 446755 2006-09-15 21:56:27Z mrglavas $
Author:
  Neil Graham, IBM

Field Summary
`protected java.util.Vector` | `fPossibleRoots`
`protected java.lang.String` | `fRootName`

Fields inherited from class org.apache.xerces.util.XMLResourceIdentifierImpl
`fBaseSystemId, fExpandedSystemId, fLiteralSystemId, fNamespace, fPublicId`

Fields inherited from interface org.apache.xerces.xni.grammars.XMLGrammarDescription
`XML_DTD, XML_SCHEMA`

Constructor Summary
`XMLDTDDescription(java.lang.String publicId, java.lang.String literalId, java.lang.String baseId, java.lang.String expandedId, java.lang.String rootName)`
`XMLDTDDescription(org.apache.xerces.xni.parser.XMLInputSource source)`
`XMLDTDDescription(org.apache.xerces.xni.XMLResourceIdentifier id, java.lang.String rootName)`

Method Summary
`boolean` | `equals(java.lang.Object desc)` Compares this grammar with the given grammar.
`java.lang.String` | `getGrammarType()` Return the type of this grammar.
`java.lang.String` | `getRootName()` Return the root name of this DTD.
`int` | `hashCode()` Returns the hash code of this grammar Because our .equals method is so complex, we just return a very simple hash that might avoid calls to the equals method a bit...
`void` | `setPossibleRoots(java.util.Vector possibleRoots)` Set possible roots
`void` | `setRootName(java.lang.String rootName)` Set the root name

Methods inherited from class org.apache.xerces.util.XMLResourceIdentifierImpl
`clear, getBaseSystemId, getExpandedSystemId, getLiteralSystemId, getNamespace, getPublicId, setBaseSystemId, setExpandedSystemId, setLiteralSystemId, setNamespace, setPublicId, setValues, setValues, toString`

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

Methods inherited from interface org.apache.xerces.xni.XMLResourceIdentifier
`getBaseSystemId, getExpandedSystemId, getLiteralSystemId, getNamespace, getPublicId, setBaseSystemId, setExpandedSystemId, setLiteralSystemId, setNamespace, setPublicId`

Field Detail

### fRootName

    protected java.lang.String fRootName

### fPossibleRoots

    protected java.util.Vector fPossibleRoots

Constructor Detail

### XMLDTDDescription

    public XMLDTDDescription(org.apache.xerces.xni.XMLResourceIdentifier id,
                             java.lang.String rootName)

### XMLDTDDescription

    public XMLDTDDescription(java.lang.String publicId,
                             java.lang.String literalId,
                             java.lang.String baseId,
                             java.lang.String expandedId,
                             java.lang.String rootName)

### XMLDTDDescription

    public XMLDTDDescription(org.apache.xerces.xni.parser.XMLInputSource source)

Method Detail

### getGrammarType

    public java.lang.String getGrammarType()

  Description copied from interface: `org.apache.xerces.xni.grammars.XMLGrammarDescription`
  Return the type of this grammar.
  Specified by:
    `getGrammarType` in interface `org.apache.xerces.xni.grammars.XMLGrammarDescription`
  Following copied from interface: `org.apache.xerces.xni.grammars.XMLGrammarDescription`
  Returns:
    the type of this grammar

### getRootName

    public java.lang.String getRootName()

  Description copied from interface: `org.apache.xerces.xni.grammars.XMLDTDDescription`
  Return the root name of this DTD.
  Specified by:
    `getRootName` in interface `org.apache.xerces.xni.grammars.XMLDTDDescription`
  Returns:
    the root name of this DTD or null if root name is unknown

### setRootName

    public void setRootName(java.lang.String rootName)

  Set the root name

### setPossibleRoots

    public void setPossibleRoots(java.util.Vector possibleRoots)

  Set possible roots

### equals

    public boolean equals(java.lang.Object desc)

  Compares this grammar with the given grammar. Currently, we compare as follows: - if grammar type not equal return false immediately - try and find a common root name: - if both have roots, use them - else if one has a root, examine other's possible root's for a match; - else try all combinations - test fExpandedSystemId and fPublicId as above
  Overrides:
    `equals` in class `java.lang.Object`
  Parameters:
    `desc` - The description of the grammar to be compared with
  Returns:
    True if they are equal, else false

### hashCode

    public int hashCode()

  Returns the hash code of this grammar Because our .equals method is so complex, we just return a very simple hash that might avoid calls to the equals method a bit...
  Overrides:
    `hashCode` in class `XMLResourceIdentifierImpl`
  Returns:
    The hash code

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