/*
*
*
* Portions Copyright 2000-2007 Sun Microsystems, Inc. All Rights
* Reserved. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
/*****************************************************************************
* Copyright (C) The Apache Software Foundation. All rights reserved. *
* ------------------------------------------------------------------------- *
* This software is published under the terms of the Apache Software License *
* version 1.1, a copy of which has been included with this distribution in *
* the LICENSE file. *
*****************************************************************************/
package com.sun.perseus.builder;
import com.sun.perseus.platform.ThreadSupport;
import com.sun.perseus.model.CompositeNode;
import com.sun.perseus.model.DocumentNode;
import com.sun.perseus.model.ElementNode;
import com.sun.perseus.model.Font;
import com.sun.perseus.model.FontFace;
import com.sun.perseus.model.ModelNode;
import com.sun.perseus.model.UpdateAdapter;
import com.sun.perseus.model.UpdateListener;
import com.sun.perseus.model.Use;
import com.sun.perseus.util.SimpleTokenizer;
import com.sun.perseus.util.SVGConstants;
import com.sun.perseus.platform.GZIPSupport;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.w3c.dom.DOMException;
import java.util.Vector;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.Reader;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.ParserConfigurationException;
/**
* NOTE: need to change currentElement management so that there is only a
* need to do a getParent() and cast to (ElementNode).
*
* <code>ModelBuilder</code> is a SAX2 <code>ContentHandler</code> that
* builds a <b>Model</b> (i.e. a tree of <code>ModelNode</code>s from
* the SAX2 events. <br />
*
* This class also offers a static method to synchronously builds a
* <b>Model</b> given a URI: {@link ModelBuilder#loadDocument loadDocument}.
*
* @version $Id: ModelBuilder.java,v 1.10 2006/07/13 00:55:57 st125089 Exp $
*/
public class ModelBuilder extends DefaultHandler {
/**
* The default DTD subset used when resolving the DTD entities.
*/
public static final String DTD_SUBSET =
"<!ATTLIST svg\n" +
" xmlns CDATA #FIXED \"http://www.w3.org/2000/svg\"\n" +
" xmlns:xlink CDATA #FIXED \"http://www.w3.org/1999/xlink\"\n" +
">";
/**
* The message used in the SAXException when the
* loading thread is interrupted
*/
public static final String LOAD_INTERRUPTED = "Load Interrupted : ";
/**
* The accepted DTD public IDs.
*/
protected static String dtdids = "-//W3C//DTD SVG 1.1 Tiny//EN";
/**
* Object keeping track of the current node, i.e., the
* last node that was built from an element.
*/
protected ElementNode currentElement;
/**
* Root of the model tree
*/
protected DocumentNode modelRoot;
/**
* Keeps track of opened streams (entities) so that
* they can be closed when parsing completes.
* @see #resolveEntity
*/
protected Vector entityStreams = new Vector();
/**
* Keeps pending namespaceURI to prefix mapping. This is used because
* the prefix mapping is declared in the startPrefixMapping method
* _before_ startElement is called. Therefore, the startElement method
* will use this pendingPrefixMapping vector to declare prefix mappings
* on the newly created element.
*/
protected Vector pendingPrefixMapping = null;
/**
* Used to allows quick check on pendingPrefixMapping.
*/
protected Vector pendingPrefixMappingCache = new Vector();
/**
* The <code>modelFactory</code> is used to build
* <code>ModelNode</code> instances corresponding
* to individual nodes in the parsed XML documents.
* This <code>ModelBuilder</code> aggregates the nodes
* manufactured by the <code>modelFactory</code>
*
* @param modelFactoryIn the factory that contains element
* prototypes for the supported element types
* @param modelRootIn the DocumentNode that should be populated
* with the result of the build process.
*/
ModelBuilder(Vector modelFactoryIn,
final DocumentNode modelRootIn) {
if (modelFactoryIn == null) {
modelFactoryIn = SVGTinyModelFactory.getPrototypes(modelRootIn);
}
this.modelRoot = modelRootIn;
int n = modelFactoryIn.size();
for (int i = 0; i < n; i++) {
modelRoot.addPrototype((ElementNode) modelFactoryIn.elementAt(i));
}
}
/**
* @return the root of the tree built by this builder.
* null is returned if no tree was built yet
*/
final DocumentNode getModelRoot() {
return modelRoot;
}
/**
* Utility method. Invokes the <code>Runnable</code> on the
* <code>modelRoot.invokeAndWait</code>.
*
* @param runnable the <code>Runnable</code> to run
* @throws SAXException if the input <code>Runnable</code> is
* interrupted while pending execution or while running.
*/
protected void invokeAndWait(final Runnable runnable) throws SAXException {
try {
if (!ThreadSupport.isInterrupted(Thread.currentThread())) {
modelRoot.invokeAndWait(runnable);
} else {
throw new InterruptedException();
}
} catch (InterruptedException ie) {
throw new SAXException(LOAD_INTERRUPTED
+ Thread.currentThread());
}
}
////////////////////////////////////////////////////////////////////
// Default implementation of the EntityResolver interface.
////////////////////////////////////////////////////////////////////
/**
* Resolve an external entity.
*
* @param publicId The public identifer, or null if none is
* available.
* @param systemId The system identifier provided in the XML
* document.
* @return The new input source, or null to require the
* default behaviour.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.EntityResolver#resolveEntity
*/
public final InputSource resolveEntity(final String publicId,
final String systemId)
throws SAXException {
if (publicId == null || dtdids.indexOf(publicId) != -1) {
// If there is no declared publicId or if the publicId is
// one of the supported ones (the test is very lose but quick)
// we assume the input source is an SVG Tiny view and we just
// process a small DTD subset that includes the default
// namespace and xlink namespace declarations. Attribute defaulting
// is handled by the code, so are default attributes, so there is
// no need to process the DTDs.
InputSource is = new InputSource();
Reader reader = new InputStreamReader(
new ByteArrayInputStream(DTD_SUBSET.getBytes()));
is.setCharacterStream(reader);
// Keep track of opened streams as some SAX
// implementations do not close that stream.
entityStreams.addElement(reader);
return is;
}
// Let the SAX parser find the entity.
return null;
}
////////////////////////////////////////////////////////////////////
// Default implementation of DTDHandler interface.
////////////////////////////////////////////////////////////////////
/**
* Receive notification of a notation declaration.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass if they wish to keep track of the notations
* declared in a document.</p>
*
* @param name The notation name.
* @param publicId The notation public identifier, or null if not
* available.
* @param systemId The notation system identifier.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.DTDHandler#notationDecl
*/
/*
public void notationDecl(String name, String publicId, String systemId)
throws SAXException {
// no op
}
*/
/**
* Receive notification of an unparsed entity declaration.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass to keep track of the unparsed entities
* declared in a document.</p>
*
* @param name The entity name.
* @param publicId The entity public identifier, or null if not
* available.
* @param systemId The entity system identifier.
* @param notationName The name of the associated notation.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.DTDHandler#unparsedEntityDecl
*/
/*
public void unparsedEntityDecl(String name, String publicId,
String systemId, String notationName) throws SAXException {
// no op
}
*/
////////////////////////////////////////////////////////////////////
// Default implementation of ContentHandler interface.
////////////////////////////////////////////////////////////////////
/**
* Receive a Locator object for document events.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass if they wish to store the locator for use
* with other document events.</p>
*
* @param locator A locator for all SAX document events.
* @see org.xml.sax.ContentHandler#setDocumentLocator
* @see org.xml.sax.Locator
*/
public final void setDocumentLocator(final Locator locator) {
// ctx.setLocator(locator);
}
/**
* <b>SAX</b>: Implements {@link
* org.xml.sax.ContentHandler#startDocument() ContentHander.startDocument}.
*/
public final void startDocument() {
}
/**
* Receive notification of the end of the document.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass to take specific actions at the end
* of a document (such as finalising a tree or closing an output
* file).</p>
*
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#endDocument
*/
public final void endDocument() throws SAXException {
// Validate the document.
try {
modelRoot.validate();
} catch (DOMException de) {
de.printStackTrace();
throw new SAXException(de.getMessage());
}
invokeAndWait(new Runnable() {
public void run() {
UpdateListener um = modelRoot.getUpdateListener();
modelRoot.setLoaded(true);
um.loadComplete(modelRoot);
}
});
}
/**
* Receive notification of the start of a Namespace mapping.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass to take specific actions at the start of
* each Namespace prefix scope (such as storing the prefix mapping).</p>
*
* @param prefix The Namespace prefix being declared.
* @param uri The Namespace URI mapped to the prefix.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#startPrefixMapping
*/
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
pendingPrefixMappingCache.addElement(new String[] {prefix, uri});
pendingPrefixMapping = pendingPrefixMappingCache;
}
/**
* Receive notification of the end of a Namespace mapping.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass to take specific actions at the end of
* each prefix mapping.</p>
*
* @param prefix The Namespace prefix being declared.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#endPrefixMapping
*/
/*
public void endPrefixMapping(String prefix) throws SAXException {
// no op
}
*/
/**
* Receive notification of the start of an element.
*
* @param uri The element's namespace uri
* @param localName The element's local name, i.e., within the given
* namespace
* @param qName The element's qualified name, i.e., including the namespace
* prefix
* @param attributes The specified or defaulted attributes.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#startElement
*/
public final void startElement(final String uri,
final String localName,
final String qName,
final Attributes attributes)
throws SAXException {
// ====================================================================
// First, build a new element from its XML descriptor.
// ====================================================================
ElementNode modelNode = null;
try {
modelNode = (ElementNode) modelRoot.createElementNS(uri, localName);
// Handle prefix mappings
if (pendingPrefixMapping != null) {
int n = pendingPrefixMapping.size();
for (int i = 0; i < n; i++) {
String[] mapping = (String[])
pendingPrefixMapping.elementAt(i);
modelRoot.addNamespacePrefix(mapping[0],
mapping[1],
modelNode);
}
pendingPrefixMapping.removeAllElements();
pendingPrefixMapping = null;
}
// Make sure we mark the node as _not_ loaded.
// This is important because we use the loaded bit to
// control certain behaviors, such as the progressive rendering
// behavior.
modelNode.setLoaded(false);
// ================================================
// Check that required traits have been specified.
// ================================================
String[] requiredTraits = modelNode.getRequiredTraits();
if (requiredTraits != null) {
for (int i = 0; i < requiredTraits.length; i++) {
if (attributes.getValue(requiredTraits[i]) == null) {
throw new SAXException(Messages.formatMessage(
Messages.ERROR_MISSING_ATTRIBUTE,
new Object[] {
requiredTraits[i],
modelNode.getNamespaceURI(),
modelNode.getLocalName()
}));
}
}
}
String[][] requiredTraitsNS = modelNode.getRequiredTraitsNS();
if (requiredTraitsNS != null) {
for (int i = 0; i < requiredTraitsNS.length; i++) {
if (attributes.getValue(requiredTraitsNS[i][0],
requiredTraitsNS[i][1]) == null) {
throw new SAXException(Messages.formatMessage(
Messages.ERROR_MISSING_ATTRIBUTE_NS,
new Object[] {
requiredTraitsNS[i][1],
requiredTraitsNS[i][0],
modelNode.getNamespaceURI(),
modelNode.getLocalName()
}));
}
}
}
// ================================================
// End of required traits check
// ================================================
// ================================================
// Apply all specified traits.
// ================================================
int n = attributes.getLength();
for (int i = 0; i < n; i++) {
modelNode.setAttributeNS(attributes.getURI(i),
attributes.getLocalName(i),
attributes.getValue(i));
}
// ================================================
// Apply default traits if they were not specified.
// ================================================
String[][] defaultTraits = modelNode.getDefaultTraits();
if (defaultTraits != null) {
for (int i = 0; i < defaultTraits.length; i++) {
if (attributes.getValue(defaultTraits[i][0]) == null) {
modelNode.setAttribute(defaultTraits[i][0],
defaultTraits[i][1]);
}
}
}
// ================================================
// IMPL NOTE
//
// If the style attribute is specified, apply the
// traits it specified. The reason for handling the
// style attribute at the parser level is that it
// is not a regular trait. It is an in-line
// stylesheet. We only support it in order to
// support imports from Adobe Illustrator which
// uses the style attribute on gradients, even
// when the option to export without the style
// attribute is selected.
// ================================================
String styleAttribute =
attributes.getValue(SVGConstants.SVG_STYLE_ATTRIBUTE);
if (styleAttribute != null) {
parseStyleAttribute(styleAttribute, modelNode);
}
// ================================================
// Apply trait aliases
// ================================================
String[][] traitAliases = modelNode.getTraitAliases();
if (traitAliases != null) {
for (int i = 0; i < traitAliases.length; i++) {
if (attributes.getValue(traitAliases[i][0]) == null) {
// The trait with alias was not specified.
// Check if its alias was specified.
String v = attributes.getValue(traitAliases[i][1]);
if (v != null) {
modelNode.setAttribute(traitAliases[i][0], v);
}
}
}
}
} catch (DOMException e) {
e.printStackTrace();
throw new SAXException(e.getMessage());
}
// ====================================================================
// Append new element to the tree
// ====================================================================
if (currentElement != null) {
addToParent(modelNode, currentElement);
} else {
addToParent(modelNode, modelRoot);
}
currentElement = modelNode;
// ====================================================================
// Notify application that load has begun on a new element
// ====================================================================
final ModelNode startedNode = modelNode;
final UpdateListener ul = modelRoot.getUpdateListener();
invokeAndWait(new Runnable() {
public void run() {
ul.loadBegun(startedNode);
}
});
// ====================================================================
// Check if there were any delayed exception. A delayed exception
// allows progressive rendering of bad path to happen before the
// exception which captured the bad path data is actually thrown (below)
// ====================================================================
try {
modelRoot.checkDelayedException();
} catch (DOMException e) {
throw new SAXException(e.getMessage());
}
}
/**
* Utility method to parse a trait value.
*
* @param styleValue the value of the style attribute to parse.
* @param elt the ElementNode on which trait values should be set.
*/
private void parseStyleAttribute(final String styleValue,
final ElementNode elt) {
SimpleTokenizer st = new SimpleTokenizer(styleValue,
SVGConstants.COMMA_STR);
while (st.hasMoreTokens()) {
String traitSpec = st.nextToken();
int ci = traitSpec.indexOf(':');
String traitName = null;
String traitValue = null;
if (ci != -1) {
traitName = traitSpec.substring(0, ci);
traitValue = traitSpec.substring(ci + 1);
} else {
traitName = "";
traitValue = "";
}
elt.setAttribute(traitName, traitValue);
}
}
/**
* Adds the input node to the given parent. If there is no
* associated <code>RunnableQueue</code>, the child is simply
* added to the parent in the calling thread. If there is
* a <code>RunnableQueue</code>, the child is added to the parent
* the <code>RunnableQueue</code> thread, by invoking a
* <code>Runnable</code> on the queue.
*
* @param child node to add to the parent
* @param parent node to which the child is added.
*
* @throws SAXException if the child cannot be added to the parent
* because the thread was interrupted or if the thread
* was interrupted to begin with.
*/
void addToParent(final ElementNode child,
final CompositeNode parent)
throws SAXException {
invokeAndWait(new Runnable() {
public void run() {
parent.add(child);
}
});
// This may happen, for example, if the loading thread
// is interrupted by an update listener.
if (ThreadSupport.isInterrupted(Thread.currentThread())) {
throw new SAXException(LOAD_INTERRUPTED
+ Thread.currentThread());
}
}
/**
* Debug: trace element to console
*
* @param uri the element's namespace uri
* @param localName the element's local name
* @param qName the element's qualified name
* @param attributes the element's attributes
*/
/*
public final void traceAttributes(final String uri,
final String localName,
final String qName,
final Attributes attributes) {
System.out.println(">>>>> startElement <" + localName
+ "> \n\turi = " + uri + "\n\tqName = " + qName);
int n = attributes.getLength();
for (int i = 0; i < n; i++) {
System.out.println("=============>");
System.out.println(" uri[" + i + "] = " + attributes.getURI(i));
System.out.println(" name[" + i + "] = local("
+ attributes.getLocalName(i) + ") qname("
+ attributes.getQName(i) + ")");
System.out.println(" value[" + i + "] = ivalue("
+ attributes.getValue(i)
+ ") qvalue("
+ attributes.getValue(attributes.getQName(i))
+ ") urivalue("
+ attributes.getValue(attributes.getLocalName(i),
attributes.getURI(i))
+ ")");
System.out.println(attributes.getQName(i) + " = "
+ attributes.getValue(i));
System.out.println("<=============");
}
}
*/
/**
* Updates the <tt>currentElement</tt>.
*
* @param uri The element's namespace uri.
* @param localName The element's local name
* @param qName The element's qualified name
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#endElement
*/
public final void endElement(final String uri,
final String localName,
final String qName) throws SAXException {
//
// See beginElement: currentElement _cannot_ be null
//
// Update the Font data base if a new FontFace was loaded
if (currentElement instanceof Font) {
invokeAndWait(new Runnable() {
public void run() {
ModelNode fc
= currentElement.getFirstChildNode();
if (fc != null && fc instanceof FontFace) {
modelRoot.addFontFace
((FontFace) fc);
}
}
});
}
invokeAndWait(new Runnable() {
public void run() {
UpdateListener um = modelRoot.getUpdateListener();
currentElement.setLoaded(true);
um.loadComplete(currentElement);
}
});
// Move up the next content node
ModelNode parent = currentElement.getParent();
if (parent instanceof ElementNode) {
currentElement = (ElementNode) parent;
} else {
currentElement = null;
}
}
/**
* Receive notification of character data inside an element.
*
* <p>By default, do nothing. Application writers may override this
* method to take specific actions for each chunk of character data
* (such as adding the data to a node or buffer, or printing it to
* a file).</p>
*
* @param ch The characters.
* @param start The start position in the character array.
* @param length The number of characters to use from the
* character array.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#characters
*/
public final void characters(final char[] ch,
final int start,
final int length) throws SAXException {
if (currentElement != null) {
final String text = new String(ch, start, length);
final UpdateListener ul = modelRoot.getUpdateListener();
invokeAndWait(new Runnable() {
public void run() {
currentElement.appendTextChild(text);
ul.textInserted(currentElement);
}
});
} else {
System.err.println(">>>>>>>>>>>>>> currentElement is null!!!!!!!");
}
}
/**
* Receive notification of ignorable whitespace in element content.
*
* <p>By default, do nothing. Application writers may override this
* method to take specific actions for each chunk of ignorable
* whitespace (such as adding data to a node or buffer, or printing
* it to a file).</p>
*
* @param ch The whitespace characters.
* @param start The start position in the character array.
* @param length The number of characters to use from the
* character array.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#ignorableWhitespace
*/
/*
public void ignorableWhitespace(char ch[], int start, int length)
throws SAXException {
// no op
}
*/
/**
* Receive notification of a processing instruction.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass to take specific actions for each
* processing instruction, such as setting status variables or
* invoking other methods.</p>
*
* @param target The processing instruction target.
* @param data The processing instruction data, or null if
* none is supplied.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#processingInstruction
*/
/*
public void processingInstruction(String target, String data)
throws SAXException {
// no op
}
*/
/**
* Receive notification of a skipped entity.
*
* <p>By default, do nothing. Application writers may override this
* method in a subclass to take specific actions for each
* processing instruction, such as setting status variables or
* invoking other methods.</p>
*
* @param name The name of the skipped entity.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#processingInstruction
*/
/*
public void skippedEntity(String name) throws SAXException {
// no op
}
*/
////////////////////////////////////////////////////////////////////
// Default implementation of the ErrorHandler interface.
////////////////////////////////////////////////////////////////////
/**
* Report a fatal XML parsing error.
*
* <p>The default implementation throws a SAXParseException.
* Application writers may override this method in a subclass if
* they need to take specific actions for each fatal error (such as
* collecting all of the errors into a single report): in any case,
* the application must stop all regular processing when this
* method is invoked, since the document is no longer reliable, and
* the parser may no longer report parsing events.</p>
*
* @param e The error information encoded as an exception.
* @exception org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ErrorHandler#fatalError
* @see org.xml.sax.SAXParseException
*/
public final void fatalError(final SAXParseException e)
throws SAXException {
throw e;
}
// =========================================================================
// Utility method
// =========================================================================
/**
* Loads an SVG Tiny document from a given URI
*
* @param svgURI the URI of the SVG document to load.
* @return the <code>DocumentNode</code> built from the requested svgURI.
* @throws IOException if the file cannot be loaded.
*/
public static DocumentNode loadDocument(final String svgURI)
throws IOException {
InputStream is = GZIPSupport.openHandleGZIP(svgURI);
DocumentNode doc = new DocumentNode();
doc.setLoaded(false);
doc.setDocumentURI(svgURI);
UpdateAdapter updateAdapter = new UpdateAdapter();
doc.setUpdateListener(updateAdapter);
loadDocument(is, doc);
if (!updateAdapter.loadSuccess()) {
Exception cause = updateAdapter.getLoadingFailedException();
if (cause == null) {
throw new IOException();
} else {
throw new IOException(cause.getMessage());
}
}
return doc;
}
/**
* Load an SVG Tiny document at the given input stream.
*
* This method uses JAXP to define the SAX parser to use.
*
* Any error is reported to the input <code>DocumentNode</code>'s
* <code>UpdateListener</code>'s <code>loadFailed</code> method.
*
* @param is the <code>InputStream</code> from which the SVG content is
* read. This might be GZIPed compressed stream. If the input stream
* is null, an input stream is opened from the root's document URI.
* @param root the documentNode to populate with the document's content
*
*
* @throws IllegalArgumentException if the root's URI is null,
* if root is null or if the root's <code>UpdateListener</code> is
* null
*/
public static void loadDocument(final InputStream is,
final DocumentNode root) {
loadDocument(is, root, null);
}
/**
* Load an SVG Tiny document at the given input stream.
*
* This method uses JAXP to define the SAX parser to use.
*
* Any error is reported to the input <code>DocumentNode</code>'s
* <code>UpdateListener</code>'s <code>loadFailed</code> method.
*
* @param is the <code>InputStream</code> from which the SVG content is
* read. This might be GZIPed compressed stream. If the input stream
* is null, an input stream is opened from the root's document URI.
* @param root the documentNode to populate with the document's content
* @param modelFactory the <code>ModelFactory</code> used to turn XML
* elements into <code>ModelNode</code> instances.
*
* @throws IllegalArgumentException if the root's URI is null,
* if root is null or if the root's <code>UpdateListener</code> is
* null
*/
public static void loadDocument(InputStream is,
final DocumentNode root,
Vector modelFactory) {
if (root == null) {
throw new IllegalArgumentException();
}
root.setLoaded(false);
String svgURI = root.getURIBase();
if (is == null && svgURI == null) {
throw new IllegalArgumentException();
}
final UpdateListener updateListener = root.getUpdateListener();
if (updateListener == null) {
throw new IllegalArgumentException();
}
// Before parsing the file, we add a default mapping for the
// SVG and XLink namespaces.
root.addNamespacePrefix(SVGConstants.XLINK_PREFIX,
SVGConstants.XLINK_NAMESPACE_URI,
root);
root.addNamespacePrefix("",
SVGConstants.SVG_NAMESPACE_URI,
root);
ModelBuilder modelBuilder = null;
InputStream gzipIS = null;
try {
// Get a SAX parser through the JAXP API. The
// parser does not do validation and is namespace aware
SAXParserFactory factory = SAXParserFactory.newInstance();
// System.err.println(">>>>>>>>>>>>>>>> SAXParserFactory class: "
// + factory.getClass().getName());
factory.setNamespaceAware(true);
factory.setValidating(false);
SAXParser parser = null;
parser = factory.newSAXParser();
final SAXParser saxParser = parser;
// Check the input stream. If the input stream is not null, we
// load that stream. Otherwise, we build an input stream from
// the root's URI.
if (is == null) {
is = GZIPSupport.openHandleGZIP(svgURI);
}
// The following wraps the input stream, if necessary, to handle
// GZIP compression.
gzipIS = GZIPSupport.handleGZIP(is);
final InputStream fgzipIS = gzipIS;
root.invokeAndWait(new Runnable() {
public void run() {
// Parse the document now. Our modelBuilder
// handles the parser's SAX events.
updateListener.loadStarting(root, fgzipIS);
}
});
modelBuilder
= new ModelBuilder(modelFactory, root);
saxParser.parse(gzipIS, modelBuilder);
} catch (ParserConfigurationException pce) {
loadingFailed(updateListener, root, pce);
} catch (SAXParseException spe) {
loadingFailed(updateListener, root, spe);
} catch (SAXException se) {
loadingFailed(updateListener, root, se);
} catch (IOException ioe) {
loadingFailed(updateListener, root, ioe);
} catch (Exception e) {
loadingFailed(updateListener, root, e);
} finally {
try {
if (gzipIS != null) {
gzipIS.close();
}
} catch (IOException ioe) {
// Don't do anything if we got an exception
// while trying to close the stream.
}
if (modelBuilder != null) {
int n = modelBuilder.entityStreams.size();
for (int i = 0; i < n; i++) {
Reader r = (Reader) modelBuilder.entityStreams.elementAt(i);
try {
r.close();
} catch (IOException ioe) {
// Do nothing: this means the stream was
// closed by the SAX parser.
}
}
}
}
}
/**
* Utility method to report an exception to the UpdateListener
* in the proper thread.
*
* @param updateListener the <code>UpdateListener</code> to which
* the error should be reported.
* @param root the <code>DocumentNode</code> which was being loaded.
* @param e the <code>Exception</code> which caused the failure.
*/
protected static void loadingFailed(final UpdateListener updateListener,
final DocumentNode root,
final Exception e) {
System.err.println(">>>>>>>>>>>>>>>>>>> +++++ Loading failed ...");
e.printStackTrace();
try {
root.invokeAndWait(new Runnable() {
public void run() {
updateListener.loadingFailed(root, e);
}
});
} catch (InterruptedException ie) {
// The current thread was interrupted. Loading Failed will
// not be reported...
return;
}
}
}
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