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Diffstat (limited to 'MS_0.6.0_20090114/org.eclipse.osee.framework.jdk.core/src/org/eclipse/osee/framework/jdk/core/util/io/xml/AbstractSaxHandler.java')
| -rw-r--r-- | MS_0.6.0_20090114/org.eclipse.osee.framework.jdk.core/src/org/eclipse/osee/framework/jdk/core/util/io/xml/AbstractSaxHandler.java | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/MS_0.6.0_20090114/org.eclipse.osee.framework.jdk.core/src/org/eclipse/osee/framework/jdk/core/util/io/xml/AbstractSaxHandler.java b/MS_0.6.0_20090114/org.eclipse.osee.framework.jdk.core/src/org/eclipse/osee/framework/jdk/core/util/io/xml/AbstractSaxHandler.java new file mode 100644 index 00000000000..b7c51447e66 --- /dev/null +++ b/MS_0.6.0_20090114/org.eclipse.osee.framework.jdk.core/src/org/eclipse/osee/framework/jdk/core/util/io/xml/AbstractSaxHandler.java @@ -0,0 +1,128 @@ +/******************************************************************************* + * Copyright (c) 2004, 2007 Boeing. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * Boeing - initial API and implementation + *******************************************************************************/ +package org.eclipse.osee.framework.jdk.core.util.io.xml; + +import java.io.IOException; +import org.xml.sax.Attributes; +import org.xml.sax.SAXException; +import org.xml.sax.ext.LexicalHandler; +import org.xml.sax.helpers.DefaultHandler; + +/** + * @author Ryan D. Brooks + * + * If you want to preserve CDATA sections you need to follow this pattern: + * + * XMLReader xmlReader = XMLReaderFactory.createXMLReader(); + * xmlReader.setContentHandler(this); + * xmlReader.setProperty("http://xml.org/sax/properties/lexical-handler", this); //This is the important part + * + */ +public abstract class AbstractSaxHandler extends DefaultHandler implements LexicalHandler{ +// Buffer for collecting data from the "characters" SAX event. + private StringBuilder contents; + private final int maxContentLength; + + protected AbstractSaxHandler() { + this(0); + } + + protected AbstractSaxHandler(int maxContentLength) { + this.contents = new StringBuilder(2000); + this.maxContentLength = maxContentLength; + } + + /* (non-Javadoc) + * @see org.xml.sax.helpers.DefaultHandler#characters(char[], int, int) + */ + @Override + public void characters(char[] ch, int start, int length) throws SAXException { + if (maxContentLength > 0 && contents.length() + length > maxContentLength) { + return; // don't add more characters if doing so will make the content too long + } + contents.append(ch, start, length); + } + + /* (non-Javadoc) + * @see org.xml.sax.helpers.DefaultHandler#endElement(java.lang.String, java.lang.String, java.lang.String) + */ + @Override + public void endElement(String uri, String localName, String qName) throws SAXException { + endElementFound(uri, localName, qName); + contents.setLength(0); // efficiently reset the StringBuilder to be empty (but preserve its capacity) + } + + /* (non-Javadoc) + * @see org.xml.sax.helpers.DefaultHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes) + */ + @Override + public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { + startElementFound(uri, localName, qName, attributes); + contents.setLength(0); // efficiently reset the StringBuilder to be empty (but preserve its capacity) + } + + public abstract void startElementFound(String uri, String localName, String qName, Attributes attributes) throws SAXException; + + public abstract void endElementFound(String uri, String localName, String qName) throws SAXException; + + public String getContents() { + return contents.toString(); + } + + public void addContentsTo(Appendable appendable) throws IOException { + appendable.append(contents); + } + + /* (non-Javadoc) + * @see org.xml.sax.ext.LexicalHandler#comment(char[], int, int) + */ + public void comment(char[] ch, int start, int length) throws SAXException { + } + + /* (non-Javadoc) + * @see org.xml.sax.ext.LexicalHandler#endCDATA() + */ + public void endCDATA() throws SAXException { + contents.append("]]>"); + } + + /* (non-Javadoc) + * @see org.xml.sax.ext.LexicalHandler#endDTD() + */ + public void endDTD() throws SAXException { + } + + /* (non-Javadoc) + * @see org.xml.sax.ext.LexicalHandler#endEntity(java.lang.String) + */ + public void endEntity(String name) throws SAXException { + } + + /* (non-Javadoc) + * @see org.xml.sax.ext.LexicalHandler#startCDATA() + */ + public void startCDATA() throws SAXException { + contents.append("<![CDATA["); + } + + /* (non-Javadoc) + * @see org.xml.sax.ext.LexicalHandler#startDTD(java.lang.String, java.lang.String, java.lang.String) + */ + public void startDTD(String name, String publicId, String systemId) + throws SAXException { + } + + /* (non-Javadoc) + * @see org.xml.sax.ext.LexicalHandler#startEntity(java.lang.String) + */ + public void startEntity(String name) throws SAXException { + } +}
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