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package org.apache.commons.javaflow.utils; |
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|
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import org.apache.commons.javaflow.bytecode.transformation.ResourceTransformer; |
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import org.apache.commons.javaflow.bytecode.transformation.bcel.BcelClassTransformer; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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|
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import java.io.ByteArrayOutputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileNotFoundException; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.util.jar.JarEntry; |
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import java.util.jar.JarInputStream; |
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import java.util.jar.JarOutputStream; |
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|
36 | 0 | public final class RewritingUtils { |
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|
38 | 0 | private final static Log log = LogFactory.getLog(RewritingUtils.class); |
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|
40 | 0 | public interface Matcher { |
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boolean isMatching( final String name ); |
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} |
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|
44 | 0 | private final static Matcher MATCH_ALL = new Matcher() { |
45 | 0 | public boolean isMatching(final String pName) { |
46 | 0 | return true; |
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} |
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}; |
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|
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|
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|
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|
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public static void rewriteClassFile( |
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final File pInput, |
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final ResourceTransformer transformer, |
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final File pOutput |
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) throws IOException { |
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|
59 | 0 | final byte[] original = toByteArray(pInput); |
60 | 0 | byte[] transformed = transformer.transform(original); |
61 | 0 | final FileOutputStream os = new FileOutputStream(pOutput); |
62 | 0 | os.write(transformed); |
63 | 0 | os.close(); |
64 | 0 | } |
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|
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public static boolean rewriteJar( |
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final JarInputStream pInput, |
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final ResourceTransformer transformer, |
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final JarOutputStream pOutput |
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) throws IOException { |
71 | 0 | return rewriteJar(pInput, transformer, pOutput, MATCH_ALL); |
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} |
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|
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public static boolean rewriteJar( |
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final JarInputStream pInput, |
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final ResourceTransformer transformer, |
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final JarOutputStream pOutput, |
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final Matcher pMatcher |
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) throws IOException { |
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|
81 | 0 | boolean changed = false; |
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|
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while(true) { |
84 | 0 | final JarEntry entry = pInput.getNextJarEntry(); |
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|
86 | 0 | if (entry == null) { |
87 | 0 | break; |
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} |
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|
90 | 0 | if (entry.isDirectory()) { |
91 | 0 | pOutput.putNextEntry(new JarEntry(entry)); |
92 | 0 | continue; |
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} |
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|
95 | 0 | final String name = entry.getName(); |
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|
97 | 0 | pOutput.putNextEntry(new JarEntry(name)); |
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|
99 | 0 | if (name.endsWith(".class")) { |
100 | 0 | if (pMatcher.isMatching(name)) { |
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|
102 | 0 | if (log.isDebugEnabled()) { |
103 | 0 | log.debug("transforming " + name); |
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} |
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|
106 | 0 | final byte[] original = toByteArray(pInput); |
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|
108 | 0 | byte[] transformed = transformer.transform(original); |
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|
110 | 0 | pOutput.write(transformed); |
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|
112 | 0 | changed |= transformed.length != original.length; |
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|
114 | 0 | continue; |
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} |
116 | 0 | } else if (name.endsWith(".jar") |
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|| name.endsWith(".ear") |
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|| name.endsWith(".zip") |
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|| name.endsWith(".war")) { |
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|
121 | 0 | changed |= rewriteJar( |
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new JarInputStream(pInput), |
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transformer, |
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new JarOutputStream(pOutput), |
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pMatcher |
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); |
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|
128 | 0 | continue; |
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} |
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|
131 | 0 | int length = copy(pInput,pOutput); |
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|
133 | 0 | log.debug("copied " + name + "(" + length + ")"); |
134 | 0 | } |
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|
136 | 0 | pInput.close(); |
137 | 0 | pOutput.close(); |
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|
139 | 0 | return changed; |
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} |
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|
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public static byte[] toByteArray(File f) throws IOException { |
143 | 0 | InputStream in = new FileInputStream(f); |
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try { |
145 | 0 | return toByteArray(in); |
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} finally { |
147 | 0 | in.close(); |
148 | 0 | } |
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} |
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|
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public static byte[] toByteArray(InputStream in) throws IOException { |
152 | 0 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
153 | 0 | copy(in,baos); |
154 | 0 | return baos.toByteArray(); |
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} |
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|
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|
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|
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|
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|
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|
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public static int copy(InputStream in, OutputStream out) throws IOException { |
164 | 0 | byte[] buf = new byte[8192]; |
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int n; |
166 | 0 | int total = 0; |
167 | 0 | while ((n = in.read(buf)) >= 0) { |
168 | 0 | out.write(buf, 0, n); |
169 | 0 | total += n; |
170 | 0 | } |
171 | 0 | return total; |
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} |
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|
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|
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public static void main(final String[] args) throws FileNotFoundException, IOException { |
176 | 0 | ResourceTransformer transformer = new BcelClassTransformer(); |
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|
178 | 0 | for (int i=0; i<args.length; i+=2) { |
179 | 0 | System.out.println("rewriting " + args[i]); |
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|
181 | 0 | RewritingUtils.rewriteJar( |
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new JarInputStream(new FileInputStream(args[i])), |
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transformer, |
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new JarOutputStream(new FileOutputStream(args[i+1])) |
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); |
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} |
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|
188 | 0 | System.out.println("done"); |
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|
190 | 0 | } |
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} |