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/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.ccvs.ui;
import java.io.*;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
/**
* A simple XML writer.
*/
public class XMLWriter extends PrintWriter {
protected int tab;
/* constants */
protected static final String XML_VERSION = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"; //$NON-NLS-1$
public XMLWriter(OutputStream output) throws UnsupportedEncodingException {
super(new OutputStreamWriter(output, "UTF8")); //$NON-NLS-1$
tab = 0;
println(XML_VERSION);
}
public void endTag(String name) {
tab--;
printTag('/' + name, null);
}
public void printSimpleTag(String name, Object value) {
if (value != null) {
printTag(name, null, true, false);
print(getEscaped(String.valueOf(value)));
printTag('/' + name, null, false, true);
}
}
public void printTabulation() {
for (int i = 0; i < tab; i++)
super.print('\t');
}
private void printTag(String name, HashMap parameters) {
printTag(name, parameters, true, true);
}
private void printTag(String name, HashMap parameters, boolean tab, boolean newLine) {
printTag(name, parameters, tab, newLine, false);
}
private void printTag(String name, HashMap parameters, boolean tab, boolean newLine, boolean end) {
StringBuffer sb = new StringBuffer();
sb.append("<"); //$NON-NLS-1$
sb.append(name);
if (parameters != null)
for (Enumeration e = Collections.enumeration(parameters.keySet()); e.hasMoreElements();) {
sb.append(" "); //$NON-NLS-1$
String key = (String) e.nextElement();
sb.append(key);
sb.append("=\""); //$NON-NLS-1$
sb.append(getEscaped(String.valueOf(parameters.get(key))));
sb.append("\""); //$NON-NLS-1$
}
if (end)
sb.append('/');
sb.append(">"); //$NON-NLS-1$
if (tab)
printTabulation();
if (newLine)
println(sb.toString());
else
print(sb.toString());
}
public void startTag(String name, HashMap parameters) {
startTag(name, parameters, true);
}
public void startTag(String name, HashMap parameters, boolean newLine) {
printTag(name, parameters, true, newLine);
tab++;
}
public void startAndEndTag(String name, HashMap parameters, boolean newLine) {
printTag(name, parameters, true, true, true);
}
private static void appendEscapedChar(StringBuffer buffer, char c) {
String replacement = getReplacement(c);
if (replacement != null) {
buffer.append('&');
buffer.append(replacement);
buffer.append(';');
} else {
buffer.append(c);
}
}
public static String getEscaped(String s) {
StringBuffer result = new StringBuffer(s.length() + 10);
for (int i = 0; i < s.length(); ++i)
appendEscapedChar(result, s.charAt(i));
return result.toString();
}
private static String getReplacement(char c) {
// Encode special XML characters into the equivalent character references.
// These five are defined by default for all XML documents.
switch (c) {
case '<' :
return "lt"; //$NON-NLS-1$
case '>' :
return "gt"; //$NON-NLS-1$
case '"' :
return "quot"; //$NON-NLS-1$
case '\'' :
return "apos"; //$NON-NLS-1$
case '&' :
return "amp"; //$NON-NLS-1$
}
return null;
}
}
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