| /******************************************************************************* |
| * Copyright (c) 2008, 2017 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.update; |
| |
| import java.io.*; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Map; |
| |
| /** |
| * A simple XML writer. |
| * |
| * Copied from the org.eclipse.core.resources bundle. |
| */ |
| public class XMLWriter extends PrintWriter { |
| protected int tab; |
| |
| static final boolean ignoreWhitespace = Boolean.getBoolean("p2.ignoreWhitespace"); //$NON-NLS-1$ |
| |
| /* constants */ |
| protected static final String XML_VERSION = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"; //$NON-NLS-1$ |
| |
| public XMLWriter(OutputStream output) { |
| super(new OutputStreamWriter(output, StandardCharsets.UTF_8)); |
| 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'); |
| } |
| |
| public void printTag(String name, Map<String, String> parameters) { |
| printTag(name, parameters, true, true); |
| } |
| |
| public void printTag(String name, Map<String, String> parameters, boolean shouldTab, boolean newLine) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("<"); //$NON-NLS-1$ |
| sb.append(name); |
| if (parameters != null) |
| for (String key : parameters.keySet()) { |
| sb.append(" "); //$NON-NLS-1$ |
| sb.append(key); |
| sb.append("=\""); //$NON-NLS-1$ |
| sb.append(getEscaped(String.valueOf(parameters.get(key)))); |
| sb.append("\""); //$NON-NLS-1$ |
| } |
| sb.append(">"); //$NON-NLS-1$ |
| if (shouldTab && !ignoreWhitespace) |
| printTabulation(); |
| if (newLine && !ignoreWhitespace) |
| println(sb.toString()); |
| else |
| print(sb.toString()); |
| } |
| |
| public void startTag(String name, Map<String, String> parameters) { |
| startTag(name, parameters, true); |
| } |
| |
| public void startTag(String name, Map<String, String> parameters, boolean newLine) { |
| printTag(name, parameters, true, newLine); |
| tab++; |
| } |
| |
| 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; |
| } |
| } |