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com.hfg xml, html, svg, and bioinformatics utility library
package com.hfg.xml.parser;
import java.util.Stack;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.EmptyStackException;
import java.io.InputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import javax.xml.parsers.SAXParser;
import org.xml.sax.*;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.AttributesImpl;
import com.hfg.util.BooleanUtil;
import com.hfg.xml.Doctype;
import com.hfg.xml.XMLNamespace;
//------------------------------------------------------------------------------
/**
SaxyParser is a lightweight SAX parser.
Important (for me) differences between SaxyParser and Xerces:
- SaxyParser does NOT close InputSources upon the completion of parsing.
- SaxyParser can handle the interleaving of content and subtags.
@author J. Alex Taylor, hairyfatguy.com
*/
//------------------------------------------------------------------------------
// com.hfg XML/HTML Coding Library
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
// [email protected]
//------------------------------------------------------------------------------
public class SaxyParser extends SAXParser implements XMLReader
{
//###########################################################################
// PUBLIC FIELDS
//###########################################################################
/**
Parser property to enable entity expansion.
http://hairyfatguy.com/sax/properties/entity-expansion
False by default.
*/
public static final String ENTITY_EXPANSION_PROPERTY = "http://hairyfatguy.com/sax/properties/entity-expansion";
/**
Parser property to enable strict parsing mode.
http://hairyfatguy.com/sax/properties/strict
False by default.
*/
public static final String STRICT_PROPERTY = "http://hairyfatguy.com/sax/properties/strict";
//###########################################################################
// PRIVATE FIELDS
//###########################################################################
private Doctype mDoctype;
private ContentHandler mContentHandler;
private LexicalHandler mLexicalHandler;
private DTDHandler mDTDHandler;
private ErrorHandler mErrHandler;
private EntityResolver mEntityResolver;
private boolean debug = false;
private boolean mExpandEntities = false;
private boolean mStrict = false;
private BufferedReader mBufferedReader;
private int mLineCount;
private int mColumn;
private boolean mEOL;
private char[] mTempBuffer = new char[100];
private int mState;
private Stack mTagStack;
private Stack mStateStack;
private int mDepth;
private Map mNamespaceMap;
private Stack mDefaultNamespaceStack;
// Enumerated parser states
private static final int INITIAL = 0;
private static final int IN_START_OF_TAG = 1;
private static final int IN_XML_DECLARATION = 2;
private static final int IN_DOCTYPE = 3;
private static final int IN_START_TAG = 4;
private static final int IN_END_TAG = 5;
private static final int IN_CONTENT = 6;
private static final int IN_ENTITY = 7;
private static final int IN_CDATA = 8;
private static final int IN_COMMENT = 9;
private static final int IN_EMPTY_TAG = 10;
private static final int IN_MIDDLE_OF_START_TAG = 11;
private static final int IN_ATT_NAME = 12;
private static final int IN_ATT_VALUE = 13;
private static final int DONE = 14;
private static final int TAG_START = '<';
private static final int TAG_END = '>';
private static final int ENTITY_START = '&';
private static int MAX_ENTITY_LENGTH = 12;
private static String XMLNS = "xmlns".intern();
private static final String LEXICAL_HANDLER_PROPERTY = "http://xml.org/sax/properties/lexical-handler";
//###########################################################################
// CONSTRUCTORS
//###########################################################################
//---------------------------------------------------------------------------
public SaxyParser()
{
super();
}
//###########################################################################
// PUBLIC METHODS
//###########################################################################
//---------------------------------------------------------------------------
/**
After parsing, the Doctype (if one was set) can be retrieved here.
*/
public Doctype getDoctype()
{
return mDoctype;
}
// METHODS REQUIRED TO EXTEND SaxParser
//---------------------------------------------------------------------------
@SuppressWarnings("deprecation")
public Parser getParser()
throws SAXException
{
throw new SAXException("getParser() not supported. User getXMLReader().");
}
//---------------------------------------------------------------------------
public XMLReader getXMLReader()
{
return this;
}
//---------------------------------------------------------------------------
public boolean isNamespaceAware()
{
return true;
}
//---------------------------------------------------------------------------
public boolean isValidating()
{
return false;
}
//---------------------------------------------------------------------------
public void setProperty(String inName, Object inValue)
throws SAXNotRecognizedException
{
if (inName.equals(LEXICAL_HANDLER_PROPERTY))
{
setLexicalHandler((LexicalHandler)inValue);
}
else if (inName.equals(ENTITY_EXPANSION_PROPERTY))
{
mExpandEntities = BooleanUtil.valueOf(inValue);
}
else if (inName.equals(STRICT_PROPERTY))
{
mStrict = BooleanUtil.valueOf(inValue);
}
else
{
throw new SAXNotRecognizedException("Property '" + inName + "' not supported.");
}
}
//---------------------------------------------------------------------------
public Object getProperty(String inName)
throws SAXNotRecognizedException
{
Object obj;
if (inName.equals(LEXICAL_HANDLER_PROPERTY))
{
obj = getLexicalHandler();
}
else if (inName.equals(ENTITY_EXPANSION_PROPERTY))
{
obj = new Boolean(mExpandEntities);
}
else if (inName.equals(STRICT_PROPERTY))
{
obj = new Boolean(mStrict);
}
else
{
throw new SAXNotRecognizedException("Property '" + inName + "' not supported.");
}
return obj;
}
// METHODS REQUIRED BY THE XMLReader interface
//---------------------------------------------------------------------------
public ContentHandler getContentHandler()
{
return mContentHandler;
}
//---------------------------------------------------------------------------
public void setContentHandler(ContentHandler handler)
{
mContentHandler = handler;
}
//---------------------------------------------------------------------------
public DTDHandler getDTDHandler()
{
return mDTDHandler;
}
//---------------------------------------------------------------------------
public void setDTDHandler(DTDHandler handler)
{
mDTDHandler = handler;
}
//---------------------------------------------------------------------------
public ErrorHandler getErrorHandler()
{
return mErrHandler;
}
//---------------------------------------------------------------------------
public void setErrorHandler(ErrorHandler handler)
{
mErrHandler = handler;
}
//---------------------------------------------------------------------------
public EntityResolver getEntityResolver()
{
return mEntityResolver;
}
//---------------------------------------------------------------------------
public void setEntityResolver(EntityResolver resolver)
{
mEntityResolver = resolver;
}
//---------------------------------------------------------------------------
public void setFeature(String inName, boolean inValue)
throws SAXNotRecognizedException
{
if (inName.equals("http://xml.org/sax/features/namespaces"))
{
// Namespaces is always on.
}
else if (inName.equals("http://xml.org/sax/features/namespace-prefixes"))
{
// Always set to false.
}
else
{
throw new SAXNotRecognizedException("Feature '" + inName + "' not supported.");
}
}
//---------------------------------------------------------------------------
public boolean getFeature(String inName)
throws SAXNotRecognizedException
{
boolean outValue = false;
if (inName.equals("http://xml.org/sax/features/namespaces"))
{
outValue = true;
}
else if (inName.equals("http://xml.org/sax/features/namespace-prefixes"))
{
outValue = false;
}
else
{
throw new SAXNotRecognizedException("Feature '" + inName + "' not supported.");
}
return outValue;
}
/*
//---------------------------------------------------------------------------
public void setLocale(Locale locale)
throws SAXException
{
throw new SAXException("setLocale() is not supported by this parser.");
}
*/
//---------------------------------------------------------------------------
public LexicalHandler getLexicalHandler()
{
return mLexicalHandler;
}
//---------------------------------------------------------------------------
public void setLexicalHandler(LexicalHandler handler)
{
mLexicalHandler = handler;
}
//---------------------------------------------------------------------------
public void parse(String inSystemId)
throws SAXException, IOException
{
parse(new InputSource(inSystemId));
}
//---------------------------------------------------------------------------
public XMLNamespace getCurrentDefaultNamespace()
{
return (mDefaultNamespaceStack.size() > 0 ? XMLNamespace.getNamespace(mDefaultNamespaceStack.peek().getURI()) : null);
}
//---------------------------------------------------------------------------
private int nextChar()
throws IOException
{
int c = mBufferedReader.read();
if (c == -1) throw new EOFException();
// Need to map \r, \r\n, and \n to \n
// See XML spec section 2.11
if (c <= '\n')
{
if (c == '\n' && mEOL)
{
mEOL = false;
c = nextChar();
}
else if (mEOL)
{
mEOL = false;
}
else if (c == '\n')
{
mLineCount++;
mColumn = 0;
}
else if (c == '\r')
{
mEOL = true;
c = '\n';
mLineCount++;
mColumn = 0;
}
else
{
mColumn++;
}
}
else
{
mColumn++;
}
return c;
}
//---------------------------------------------------------------------------
private void skipEndTag(int c)
throws SAXException, IOException
{
String openTag = null;
try
{
openTag = (String) mTagStack.peek();
}
catch (EmptyStackException e)
{
StringBuffer extraEndTag = new StringBuffer(c);
while ((c = nextChar()) != TAG_END)
{
extraEndTag.append(c);
}
throw new SAXException("End tag '" + extraEndTag + "' didn't have a matching start tag!");
}
mTempBuffer[0] = (char)c;
int bytesToRead = openTag.length();
if (mBufferedReader.read(mTempBuffer, 1, bytesToRead) != bytesToRead)
{
throw new SAXException("Expected end tag '" + openTag + "' but reached the end of the file.");
}
mColumn+=bytesToRead;
if (!openTag.equals(new String(mTempBuffer, 0, openTag.length())))
{
throw new SAXException("Expected end tag '" + openTag + "' but found '"
+ (new String(mTempBuffer, 0, openTag.length())) + "' instead!"
+ " Line: " + mLineCount + " Col: " + mColumn);
}
if (mTempBuffer[bytesToRead] != TAG_END)
{
throw new SAXException("Problem with end tag '" + mTempBuffer[bytesToRead]
+ "'! Line: " + mLineCount + " Col: " + mColumn);
}
}
//---------------------------------------------------------------------------
public void parse(InputSource source)
throws SAXException, IOException
{
initNamespaceStructures();
mStateStack = new Stack();
mTagStack = new Stack();
mDepth = 0;
XMLStringBuffer buffer = new XMLStringBuffer();
XMLStringBuffer entity = new XMLStringBuffer();
String tagName = null;
String tagURI = null;
String tagLocalName = null;
AttributesImpl attributes = new AttributesImpl();
String attName = null;
mLineCount = 1;
mColumn = 0;
mEOL = false;
// int quoteChar = '"';
int quoteChar = -1;
// I'm not sure of any other way that will work to even out the differences between character and binary sources.
try
{
mBufferedReader = new BufferedReader(source.getCharacterStream(), 8192);
}
catch (NullPointerException e)
{
mBufferedReader = new BufferedReader(new InputStreamReader(source.getByteStream()), 8192);
}
mContentHandler.startDocument();
mState = INITIAL;
pushState();
try
{
int c;
while (mState != DONE)
{
c = nextChar();
switch (mState)
{
case IN_CONTENT:
while (true)
{
// We are in tag content
if (c == TAG_START)
{
pushState();
mState = IN_START_OF_TAG;
if (buffer.length() > 0)
{
if (buffer.hasNonwhitespaceContent())
{
mContentHandler.characters(buffer.getCharArray(), 0, buffer.length());
}
buffer.clear();
}
break;
}
else if (c == ENTITY_START)
{
pushState();
mState = IN_ENTITY;
entity.clear();
break;
}
else
{
buffer.append((char) c);
}
c = nextChar();
}
break;
case INITIAL:
while (true)
{
if (c == -1)
{
mState = DONE;
break;
}
else if (c == TAG_START)
{
pushState();
mState = IN_START_OF_TAG;
break;
}
else if (!Character.isWhitespace((char) c))
{
throw new SAXException("Unexpected text outside of tags (" + (char) c + ")!"
+ " Line: " + mLineCount + " Col: " + mColumn);
}
c = nextChar();
}
break;
case IN_START_OF_TAG:
// What type of tag does it look like we've wandered into?
if (c == '/')
{
popState();
mState = IN_END_TAG;
tagName = null;
}
else if (c == '?')
{
mState = IN_XML_DECLARATION;
}
else
{
mState = IN_START_TAG;
tagName = null;
attributes.clear();
buffer.append((char) c);
}
break;
case IN_START_TAG:
while (true)
{
if (Character.isWhitespace((char) c))
{
tagName = buffer.toString();
pushDepth(tagName);
buffer.clear();
mState = IN_MIDDLE_OF_START_TAG;
break;
}
else if (c == TAG_END)
{
if (null == tagName) tagName = buffer.toString();
pushDepth(tagName);
tagURI = getNamespaceURI(getNamespacePrefix(tagName));
tagLocalName = getLocalName(tagName);
mContentHandler.startElement(tagURI,
tagLocalName,
tagName,
attributes);
mState = IN_CONTENT;
buffer.clear();
break;
}
else if (c == '/')
{
if (null == tagName) tagName = buffer.toString();
pushDepth(tagName);
mState = IN_EMPTY_TAG;
break;
}
else if (c == '-'
&& buffer.toString().equals("!-"))
{
mState = IN_COMMENT;
break;
}
else if (c == '['
&& buffer.toString().equals("![CDATA"))
{
mState = IN_CDATA;
buffer.clear();
break;
}
else if (c == 'E'
&& buffer.toString().equals("!DOCTYP"))
{
mState = IN_DOCTYPE;
// buffer.clear();
buffer.prepend("<");
buffer.append((char) c);
break;
}
else
{
buffer.append((char) c);
}
c = nextChar();
}
break;
case IN_MIDDLE_OF_START_TAG:
while (true)
{
if (c == TAG_END)
{
tagURI = getNamespaceURI(getNamespacePrefix(tagName));
tagLocalName = getLocalName(tagName);
mContentHandler.startElement(tagURI,
tagLocalName,
tagName,
attributes);
buffer.clear();
mState = IN_CONTENT;
break;
}
else if (c == '/')
{
mState = IN_EMPTY_TAG;
break;
}
else if (!Character.isWhitespace((char) c))
{
mState = IN_ATT_NAME;
attName = null;
// buffer.clear();
buffer.append((char) c);
break;
}
c = nextChar();
}
break;
case IN_ATT_NAME:
while (true)
{
if (c == '=')
{
attName = buffer.toString();
mState = IN_ATT_VALUE;
buffer.clear();
break;
}
else
{
buffer.append((char) c);
}
c = nextChar();
}
break;
case IN_ATT_VALUE:
if (quoteChar == -1)
{
if (c == '"' || c == '\'')
{
quoteChar = c;
c = nextChar();
}
else
{
throw new SAXException("Improper attribute construction. Expected a quote character!");
}
}
while (true)
{
if (c == quoteChar)
{
String attValue = buffer.toString();
//debugMsg("attName: '" + attName + "'");
if (attName.startsWith("xmlns:")
|| attName.equals(XMLNS))
{
extractNamespaceDeclaration(attName, attValue);
}
attributes.addAttribute("", attName, attName, "CDATA", attValue);
buffer.clear();
quoteChar = -1;
mState = IN_MIDDLE_OF_START_TAG;
break;
}
else if (c == ENTITY_START)
{
pushState();
mState = IN_ENTITY;
entity.clear();
break;
}
else if (" \r\n\u0009".indexOf(c) >= 0)
{
buffer.append(' ');
}
else
{
buffer.append((char) c);
}
c = nextChar();
}
break;
case IN_EMPTY_TAG:
if (c != TAG_END)
{
throw new SAXException("Expected '>' for tag <" + tagName + "/>"
+ " Line: " + mLineCount + " Col: " + mColumn);
}
tagURI = getNamespaceURI(getNamespacePrefix(tagName));
tagLocalName = getLocalName(tagName);
mContentHandler.startElement(tagURI,
tagLocalName,
tagName,
attributes);
mContentHandler.endElement(tagURI,
tagLocalName,
tagName);
mTagStack.pop();
buffer.clear();
popDepth();
popState();
break;
case IN_END_TAG:
// XXXXXXXXXXXXX The ending tag better be the one currently open.
// (Otherwise it's an error.) Try to take advantage of this precognition.
//String openTag = (String) mTagStack.pop();
skipEndTag(c);
tagName = (String) mTagStack.pop();
mContentHandler.endElement(tagURI,
getLocalName(tagName),
tagName);
buffer.clear();
popDepth();
popState();
/*
while (true)
{
// We are in an end tag
if (c == TAG_END)
{
tagName = buffer.toString();
if (mDepth == 0)
{
throw new SAXException("Closing tag '' "
+ "had no opening tag!"
+ " Line: " + mLineCount + " Col: " + mColumn);
}
mContentHandler.endElement(tagURI,
tagLocalName,
tagName);
buffer.clear();
popDepth(tagName);
popState();
break;
}
else
{
buffer.append((char) c);
}
c = nextChar();
}
*/
break;
case IN_ENTITY:
boolean recoverFromInvalidEntity = false;
while (true)
{
if (c == ';')
{
String expandedEntity = expandEntity(entity.toString());
buffer.append((expandedEntity != null ? expandedEntity : "&" + entity.toString() + ";"));
entity.clear();
popState();
break;
}
else if (Character.isWhitespace((char) c))
{
if (mStrict)
{
throw new SAXException("Character entity contains whitespace !?"
+ " Line: " + mLineCount + " Col: " + mColumn);
}
else
{
recoverFromInvalidEntity = true;
break;
}
}
else if (c == '"' || c == '\'' || c == '>')
{
if (mStrict)
{
throw new SAXException("Character entity contains illegal character !?"
+ " Line: " + mLineCount + " Col: " + mColumn);
}
else
{
recoverFromInvalidEntity = true;
break;
}
}
else if (entity.length() >= MAX_ENTITY_LENGTH)
{
// Either the entity was malformed or the ampersand should have been escaped.
if (mStrict)
{
throw new SAXException("Max entity length (" + MAX_ENTITY_LENGTH + ") exceeded!?"
+ " Line: " + mLineCount + " Col: " + mColumn);
}
else
{
recoverFromInvalidEntity = true;
break;
}
}
else
{
entity.append((char) c);
}
c = nextChar();
}
if (recoverFromInvalidEntity)
{
entity.append((char) c);
buffer.append("&" + entity.toString());
entity.clear();
popState();
if (IN_ATT_VALUE == mState)
{
if (c == quoteChar)
{
String attValue = buffer.toString();
//debugMsg("attName: '" + attName + "'");
if (attName.startsWith("xmlns:")
|| attName.equals(XMLNS))
{
extractNamespaceDeclaration(attName, attValue);
}
attributes.addAttribute("", attName, attName, "CDATA", attValue);
buffer.clear();
quoteChar = -1;
mState = IN_MIDDLE_OF_START_TAG;
break;
}
}
else if (IN_CONTENT == mState)
{
if (c == TAG_START)
{
pushState();
mState = IN_START_OF_TAG;
if (buffer.length() > 0)
{
if (buffer.hasNonwhitespaceContent())
{
mContentHandler.characters(buffer.getCharArray(), 0, buffer.length());
}
buffer.clear();
}
}
}
}
break;
case IN_CDATA:
while (true)
{
if (c == TAG_END
&& buffer.toString().endsWith("]]"))
{
buffer.setLength(buffer.length() - 2);
mContentHandler.characters(buffer.getCharArray(), 0, buffer.length());
popState();
buffer.clear();
break;
}
else
{
buffer.append((char) c);
}
c = nextChar();
}
break;
case IN_COMMENT:
while (true)
{
// Inside a comment:
if (c == TAG_END
&& buffer.toString().endsWith("--"))
{
if (mLexicalHandler != null) mLexicalHandler.comment(buffer.getCharArray(), 2, buffer.length() - 4);
popState();
buffer.clear();
break;
}
else
{
buffer.append((char) c);
}
c = nextChar();
}
break;
case IN_XML_DECLARATION:
while (true)
{
buffer.append((char) c);
if (c == TAG_END)
{
popState();
if (mState == DONE) mState = INITIAL;
buffer.clear();
break;
}
c = nextChar();
}
break;
case IN_DOCTYPE:
while (true)
{
buffer.append((char) c);
if (c == TAG_END)
{
popState();
if (mState == DONE) mState = INITIAL;
mDoctype = Doctype.valueOf(buffer.toString());
buffer.clear();
break;
}
c = nextChar();
}
break;
}
}
}
catch (EOFException e)
{
// Ignore.
}
if (mDepth != 0)
{
throw new SAXException("XML Document is not properly ended! "
+ "Remaining depth= " + mDepth);
}
else if (mState != INITIAL
&& mState != DONE)
{
throw new SAXException("Parser ended in bad state (" + mState + ")!");
}
else
{
mContentHandler.endDocument();
}
}
//###########################################################################
// PRIVATE METHODS
//###########################################################################
//---------------------------------------------------------------------------
private void debugMsg(String inMsg)
{
if (debug)
{
System.err.println(inMsg);
}
}
//---------------------------------------------------------------------------
private String expandEntity(String inEntity)
throws SAXException
{
String expandedEntity = null;
if (mExpandEntities)
{
if (inEntity.startsWith("#"))
{
if (inEntity.charAt(1) == 'x')
{
// Hex
expandedEntity = "" + (char) Integer.parseInt(inEntity.substring(2), 16);
}
else
{
// Decimal
expandedEntity = "" + (char) Integer.parseInt(inEntity.substring(1));
}
}
else
{
// Try to resolve it with our battery of standard entity classes.
expandedEntity = SpecialCharacterEntities.resolveEntity(inEntity);
if (null == expandedEntity)
{
expandedEntity = Latin1Entities.getInstance().getNumericEntity(inEntity);
}
if (null == expandedEntity)
{
expandedEntity = SymbolEntities.getInstance().getNumericEntity(inEntity);
}
if (expandedEntity != null
&& expandedEntity.startsWith("#"))
{
expandedEntity = "" + (char) Integer.parseInt(expandedEntity.substring(1));
}
}
// Have we resolved it yet? If not, use the custom entity resolver if one
// has been specified.
if (null == expandedEntity)
{
if (mEntityResolver != null)
{
InputStream inStream = null;
try
{
InputSource expandedEntitySource = mEntityResolver.resolveEntity(null, inEntity);
if (expandedEntitySource != null)
{
inStream = expandedEntitySource.getByteStream();
StringBuffer entityBuffer = new StringBuffer();
int c = 0;
while ((c = inStream.read()) != -1)
{
entityBuffer.append((char) c);
}
expandedEntity = entityBuffer.toString();
}
else
{
throw new SAXException("'" + inEntity + "' is not a recognized entity.");
}
}
catch (IOException e)
{
throw new SAXException(e);
}
finally
{
if (inStream != null)
{
try
{
inStream.close();
}
catch (IOException e)
{
}
}
}
}
}
}
return expandedEntity;
}
//---------------------------------------------------------------------------
private Attributes generateAttributeList(HashMap inAttributes)
{
// NOTE: WE ARE NOT CURRENTLY SUPPORTING ATTRIBUTE TYPES XXXXXXXXXXXXXX
// The attribute type is one of the strings "CDATA", "ID", "IDREF", "IDREFS",
// "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", or "NOTATION" (always in upper case).
//
// If the parser has not read a declaration for the attribute, or if the parser
// does not report attribute types, then it must return the value "CDATA" as
// stated in the XML 1.0 Recommentation (clause 3.3.3, "Attribute-Value Normalization").
//
// For an enumerated attribute that is not a notation, the parser will report
// the type as "NMTOKEN".
String attType = "CDATA";
AttributesImpl attList = new AttributesImpl();
if (inAttributes != null)
{
Iterator iter = inAttributes.entrySet().iterator();
while (iter.hasNext())
{
Map.Entry att = (Map.Entry) iter.next();
attList.addAttribute("", (String) att.getKey(), (String) att.getKey(), attType, (String) att.getValue());
}
}
return attList;
}
//---------------------------------------------------------------------------
private void initNamespaceStructures()
{
mNamespaceMap = new HashMap();
mDefaultNamespaceStack = null;
}
//---------------------------------------------------------------------------
private void pushState()
{
mStateStack.push(new Integer(mState));
//debugMsg(mState + " pushed onto the StateStack");
}
//---------------------------------------------------------------------------
private void popState()
{
mState = ((Integer) mStateStack.pop()).intValue();
//debugMsg(mState + " popped off the StateStack");
}
//---------------------------------------------------------------------------
private void pushDepth(String inTagName)
{
mDepth++;
//debugMsg("Depth pushed to " + mDepth);
mTagStack.push(inTagName);
}
//---------------------------------------------------------------------------
private void popDepth()
throws SAXException
{
//debugMsg("Depth popped to " + (mDepth - 1));
if (mNamespaceMap.size() > 0)
{
// Can't use an iterator because we might delete the map entry and that would
// cause a ConcurrentModificaitonException.
Object[] prefixes = mNamespaceMap.keySet().toArray();
for (int i = 0; i < prefixes.length; i++)
{
String prefix = (String) prefixes[i];
Stack namespaceStack = (Stack) mNamespaceMap.get(prefix);
// There must be at least one value on the stack or we should have deleted
// the map entry for the prefix.
Namespace namespace = (Namespace) namespaceStack.peek();
if (namespace.getTagLevel() >= mDepth)
{
namespaceStack.pop();
if (namespaceStack.size() == 0)
{
mNamespaceMap.remove(prefix);
}
}
}
}
// Adjust the default namespace stack if necessary.
if (mDefaultNamespaceStack != null
&& mDefaultNamespaceStack.size() > 0)
{
Namespace namespace = (Namespace) mDefaultNamespaceStack.peek();
if (namespace.getTagLevel() >= mDepth)
{
mDefaultNamespaceStack.pop();
}
}
mDepth--;
/* String openTag = (String) mTagStack.pop();
if (!inTagName.equals(openTag))
{
throw new SAXException("Tag mismatch! Tag '" + openTag + "' was open "
+ "but the closing tag was '" + inTagName + "'!");
}
*/
if (mDepth == 0) popState();
}
//---------------------------------------------------------------------------
private void extractNamespaceDeclaration(String inName, String inURI)
{
int index = inName.indexOf(":");
if (index > 0)
{
String prefix = inName.substring(index + 1);
//debugMsg("Adding namespace '" + prefix + "': " + inURI);
Stack namespaceStack = (Stack) mNamespaceMap.get(prefix);
if (null == namespaceStack)
{
namespaceStack = new Stack();
mNamespaceMap.put(prefix, namespaceStack);
}
namespaceStack.push(new Namespace(inURI, mDepth));
XMLNamespace.getNamespace(prefix, inURI); // Register the namespace
}
else
{
//debugMsg("Setting default namespace: " + inURI);
if (null == mDefaultNamespaceStack)
{
mDefaultNamespaceStack = new Stack();
}
mDefaultNamespaceStack.push(new Namespace(inURI, mDepth));
XMLNamespace.getNamespace(inURI); // Register the namespace
}
}
//---------------------------------------------------------------------------
private String getNamespaceURI(String inPrefix)
{
String uri = null;
if (inPrefix != null)
{
Stack namespaceStack = (Stack) mNamespaceMap.get(inPrefix);
if (namespaceStack != null)
{
uri = ((Namespace) namespaceStack.peek()).getURI();
}
}
if (null == uri
&& mDefaultNamespaceStack != null
&& mDefaultNamespaceStack.size() > 0)
{
uri = ((Namespace)mDefaultNamespaceStack.peek()).getURI();
}
if (null == uri) uri = "";
return uri;
}
//---------------------------------------------------------------------------
private String getNamespacePrefix(String inValue)
{
String returnValue = null;
int i = inValue.indexOf(":");
if (i > 0)
{
returnValue = inValue.substring(0, i);
}
return returnValue;
}
//---------------------------------------------------------------------------
private String getLocalName(String inValue)
{
String returnValue = inValue;
int i = inValue.indexOf(":");
if (i > 0)
{
returnValue = inValue.substring(i + 1);
}
return returnValue;
}
//###########################################################################
// INNER CLASSES
//###########################################################################
private class EOFException extends RuntimeException
{
}
private class Namespace
{
private String mURI;
private int mTagLevel;
//------------------------------------------------------------------------
public Namespace(String inURI, int inTagLevel)
{
mURI = inURI;
mTagLevel = inTagLevel;
}
//------------------------------------------------------------------------
public String getURI()
{
return mURI;
}
//------------------------------------------------------------------------
public int getTagLevel()
{
return mTagLevel;
}
}
}