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1
11 package org.eclipse.pde.internal.build.tasks;
12
13 import java.io.*;
14 import org.apache.tools.ant.BuildException;
15 import org.apache.tools.ant.Task;
16
17
22 public class PluginVersionReplaceTask extends Task {
23 private static final String  PLUGIN_START_TAG = "<plugin"; private static final String FRAGMENT_START_TAG = "<fragment"; private static final String COMMENT_START_TAG = "<!--"; private static final String COMMENT_END_TAG = "-->"; private static final String VERSION = "version"; private static final String BACKSLASH = "\"";
30 private String pluginFilePath;
32 private boolean plugin = true;
33 private String newVersion;
34
35
39 public void setPluginFilePath(String path) {
40 pluginFilePath = path;
41 }
42
43
47 public void setVersionNumber(String qualifier) {
48 newVersion = qualifier;
49 }
50
51
55 public void setInput(String input) {
56 if (input.equalsIgnoreCase("fragment.xml")) plugin = false;
58 }
59
60 public void execute() {
61 StringBuffer buffer = null;
62 try {
63 buffer = readFile(new File(pluginFilePath));
64 } catch (IOException e) {
65 throw new BuildException(e);
66 }
67
68 int startPlugin = scan(buffer, 0, plugin ? PLUGIN_START_TAG : FRAGMENT_START_TAG);
70 int startComment = scan(buffer, 0, COMMENT_START_TAG);
71 int endComment = startComment > -1 ? scan(buffer, startComment, COMMENT_END_TAG) : -1;
72
73 while (startComment != -1 && startPlugin > startComment && startPlugin < endComment) {
74 startPlugin = scan(buffer, endComment, plugin ? PLUGIN_START_TAG : FRAGMENT_START_TAG);
75 startComment = scan(buffer, endComment, COMMENT_START_TAG);
76 endComment = startComment > -1 ? scan(buffer, startComment, COMMENT_END_TAG) : -1;
77 }
78
79 if (startPlugin == -1)
80 return;
81
82 int endPlugin = scan(buffer, startPlugin + 1, ">");
84 boolean versionFound = false;
86 while (!versionFound) {
87 int versionAttr = scan(buffer, startPlugin, VERSION);
88 if (versionAttr == -1 || versionAttr > endPlugin)
89 return;
90 if (!Character.isWhitespace(buffer.charAt(versionAttr - 1))) {
91 startPlugin = versionAttr + VERSION.length();
92 continue;
93 }
94 int endVersionWord = versionAttr + VERSION.length();
96 while (Character.isWhitespace(buffer.charAt(endVersionWord)) && endVersionWord < endPlugin) {
97 endVersionWord++;
98 }
99 if (endVersionWord > endPlugin) return;
101
102 if (buffer.charAt(endVersionWord) != '=') {
103 startPlugin = endVersionWord;
104 continue;
105 }
106
107 int startVersionId = scan(buffer, versionAttr + 1, BACKSLASH);
109 int endVersionId = scan(buffer, startVersionId + 1, BACKSLASH);
110
111 buffer.replace(startVersionId + 1, endVersionId, newVersion);
112 versionFound = true;
113 }
114 try {
115 OutputStreamWriter w = new OutputStreamWriter(new BufferedOutputStream(new FileOutputStream(pluginFilePath)), "UTF-8"); w.write(buffer.toString());
117 w.close();
118 } catch (FileNotFoundException e) {
119 } catch (IOException e) {
121 throw new BuildException(e);
122 }
123 }
124
125 private int scan(StringBuffer buf, int start, String targetName) {
126 return scan(buf, start, new String [] {targetName});
127 }
128
129 private int scan(StringBuffer buf, int start, String [] targets) {
130 for (int i = start; i < buf.length(); i++) {
131 for (int j = 0; j < targets.length; j++) {
132 if (i < buf.length() - targets[j].length()) {
133 String match = buf.substring(i, i + targets[j].length());
134 if (targets[j].equalsIgnoreCase(match))
135 return i;
136 }
137 }
138 }
139 return -1;
140 }
141
142 private StringBuffer readFile(File targetName) throws IOException {
143 InputStreamReader reader = new InputStreamReader(new BufferedInputStream(new FileInputStream(targetName)), "UTF-8"); StringBuffer result = new StringBuffer ();
145 char[] buf = new char[4096];
146 int count;
147 try {
148 count = reader.read(buf, 0, buf.length);
149 while (count != -1) {
150 result.append(buf, 0, count);
151 count = reader.read(buf, 0, buf.length);
152 }
153 } finally {
154 try {
155 reader.close();
156 } catch (IOException e) {
157 }
159 }
160 return result;
161 }
162 }
163 |
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