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/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
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*
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/**
* A sample DOM writer. This sample program illustrates how to
* traverse a DOM tree in order to print a document that is parsed.
*
* @author Andy Clark, IBM
*
* @version $Id: DOMWriter.java,v 1.2 2007/07/19 04:35:46 ofung Exp $
*/ public class DOMWriter {
//
// Constants
//
// feature ids
/** Namespaces feature id (http://xml.org/sax/features/namespaces). */ protected static final String NAMESPACES_FEATURE_ID = "http://xml.org/sax/features/namespaces";
/** Validation feature id (http://xml.org/sax/features/validation). */ protected static final String VALIDATION_FEATURE_ID = "http://xml.org/sax/features/validation";
/** Schema validation feature id (http://apache.org/xml/features/validation/schema). */ protected static final String SCHEMA_VALIDATION_FEATURE_ID = "http://apache.org/xml/features/validation/schema";
/** Schema full checking feature id (http://apache.org/xml/features/validation/schema-full-checking). */ protected static final String SCHEMA_FULL_CHECKING_FEATURE_ID = "http://apache.org/xml/features/validation/schema-full-checking";
// property ids
/** Lexical handler property id (http://xml.org/sax/properties/lexical-handler). */ protected static final String LEXICAL_HANDLER_PROPERTY_ID = "http://xml.org/sax/properties/lexical-handler";
case Node.ENTITY_REFERENCE_NODE: { if (fCanonical) {
Node child = node.getFirstChild(); while (child != null) {
write(child);
child = child.getNextSibling();
}
} else {
fOut.print('&');
fOut.print(node.getNodeName());
fOut.print(';');
fOut.flush();
} break;
}
case Node.CDATA_SECTION_NODE: { if (fCanonical) {
normalizeAndPrint(node.getNodeValue(), false);
} else {
fOut.print("<![CDATA[");
fOut.print(node.getNodeValue());
fOut.print("]]>");
}
fOut.flush(); break;
}
case Node.TEXT_NODE: {
normalizeAndPrint(node.getNodeValue(), false);
fOut.flush(); break;
}
case Node.PROCESSING_INSTRUCTION_NODE: {
fOut.print("<?");
fOut.print(node.getNodeName());
String data = node.getNodeValue(); if (data != null && data.length() > 0) {
fOut.print(' ');
fOut.print(data);
}
fOut.print("?>");
fOut.flush(); break;
}
case Node.COMMENT_NODE: { if (!fCanonical) {
fOut.print("<!--");
String comment = node.getNodeValue(); if (comment != null && comment.length() > 0) {
fOut.print(comment);
}
fOut.print("-->");
fOut.flush();
}
}
}
if (type == Node.ELEMENT_NODE) {
fOut.print("</");
fOut.print(node.getNodeName());
fOut.print('>');
fOut.flush();
}
} // write(Node)
/** Returns a sorted list of attributes. */ protected Attr[] sortAttributes(NamedNodeMap attrs) {
int len = (attrs != null) ? attrs.getLength() : 0;
Attr array[] = new Attr[len]; for (int i = 0; i < len; i++) {
array[i] = (Attr)attrs.item(i);
} for (int i = 0; i < len - 1; i++) {
String name = array[i].getNodeName(); int index = i; for (int j = i + 1; j < len; j++) {
String curName = array[j].getNodeName(); if (curName.compareTo(name) < 0) {
name = curName;
index = j;
}
} if (index != i) {
Attr temp = array[i];
array[i] = array[index];
array[index] = temp;
}
}
return array;
} // sortAttributes(NamedNodeMap):Attr[]
//
// Protected methods
//
/** Normalizes and prints the given string. */ protected void normalizeAndPrint(String s, boolean isAttValue) {
int len = (s != null) ? s.length() : 0; for (int i = 0; i < len; i++) { char c = s.charAt(i);
normalizeAndPrint(c, isAttValue);
}
} // normalizeAndPrint(String,boolean)
/** Normalizes and print the given character. */ protected void normalizeAndPrint(char c, boolean isAttValue) {
switch (c) { case '<': {
fOut.print("<"); break;
} case '>': {
fOut.print(">"); break;
} case '&': {
fOut.print("&"); break;
} case '"': {
// A '"' that appears in character data
// does not need to be escaped. if (isAttValue) {
fOut.print(""");
} else {
fOut.print("\"");
} break;
} case '\r': {
// If CR is part of the document's content, it
// must not be printed as a literal otherwise
// it would be normalized to LF when the document
// is reparsed.
fOut.print("
"); break;
} case '\n': { if (fCanonical) {
fOut.print("
"); break;
}
// else, default print char
} default: {
// In XML 1.1, control chars in the ranges [#x1-#x1F, #x7F-#x9F] must be escaped.
//
// Escape space characters that would be normalized to #x20 in attribute values
// when the document is reparsed.
//
// Escape NEL (0x85) and LSEP (0x2028) that appear in content
// if the document is XML 1.1, since they would be normalized to LF
// when the document is reparsed. if (fXML11 && ((c >= 0x01 && c <= 0x1F && c != 0x09 && c != 0x0A)
|| (c >= 0x7F && c <= 0x9F) || c == 0x2028)
|| isAttValue && (c == 0x09 || c == 0x0A)) {
fOut.print("&#x");
fOut.print(Integer.toHexString(c).toUpperCase());
fOut.print(";");
} else {
fOut.print(c);
}
}
}
} // normalizeAndPrint(char,boolean)
/** Extracts the XML version from the Document. */ protected String getVersion(Document document) { if (document == null) { return null;
}
String version = null;
Method getXMLVersion = null; try {
getXMLVersion = document.getClass().getMethod("getXmlVersion", new Class[]{});
// If Document class implements DOM L3, this method will exist. if (getXMLVersion != null) {
version = (String) getXMLVersion.invoke(document, null);
}
} catch (Exception e) {
// Either this locator object doesn't have
// this method, or we're on an old JDK.
} return version;
} // getVersion(Document)
//
// Private static methods
//
/** Prints the usage. */ private static void printUsage() {
System.err.println("usage: java dom.Writer (options) uri ...");
System.err.println();
System.err.println("options:");
System.err.println(" -p name Select parser by name.");
System.err.println(" -n | -N Turn on/off namespace processing.");
System.err.println(" -v | -V Turn on/off validation.");
System.err.println(" -s | -S Turn on/off Schema validation support.");
System.err.println(" NOTE: Not supported by all parsers.");
System.err.println(" -f | -F Turn on/off Schema full checking.");
System.err.println(" NOTE: Requires use of -s and not supported by all parsers.");
System.err.println(" -c | -C Turn on/off Canonical XML output.");
System.err.println(" NOTE: This is not W3C canonical output.");
System.err.println(" -h This help screen.");
System.err.println();
