Example usage for org.objectweb.asm ClassReader ClassReader

Introduction

In this page you can find the example usage for org.objectweb.asm ClassReader ClassReader.

Prototype

ClassReader(final byte[] classFileBuffer, final int classFileOffset, final boolean checkClassVersion) 

Source Link

Document

Constructs a new ClassReader object.

Usage

From source file:com.android.build.gradle.internal.incremental.fixture.ClassEnhancement.java

License:Apache License

@SuppressWarnings("unused") // Helpful for debugging.
public static String traceClass(byte[] bytes) {
    ClassReader classReader = new ClassReader(bytes, 0, bytes.length);
    StringWriter sw = new StringWriter();
    TraceClassVisitor traceClassVisitor = new TraceClassVisitor(new PrintWriter(sw));
    classReader.accept(traceClassVisitor, 0);
    return sw.toString();
}

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From source file:com.coradec.corajet.cldr.CarInjector.java

License:Open Source License

/**
 * Embeds the class file in the specified buffer by resolving its static injection points and
 * prepares it to resolve its instance injection points.
 *
 * @param name   the name of the class./*from   ww w. j  a  v a2s . c om*/
 * @param buffer the buffer containing the class file.
 * @param off    the offset in the buffer at which the class file starts.
 * @param len    the length of the class file in the buffer.
 * @return a byte array containing the embedded class.
 */
public byte[] embedClass(final String name, final byte[] buffer, final int off, final int len) {
    ClassReader reader = new ClassReader(buffer, off, len);
    ClassWriter writer = new ClassWriter(reader, 0);
    reader.accept(new ClassModeler(writer), 0);
    return writer.toByteArray();
}

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From source file:com.coradec.corajet.cldr.CarInjector.java

License:Open Source License

/**
 * Embeds the class file in the specified buffer by resolving its static injection points and
 * prepares it to resolve its instance injection points.
 *
 * @param name   the name of the class./*from ww w.ja  v a  2  s .c om*/
 * @param buffer the buffer containing the class file.
 * @param off    the offset in the buffer at which the class file starts.
 * @param len    the length of the class file in the buffer.
 * @return bit 0 set if the class is a component, bit 1 set if the class is an implementation,
 * all other bits are 0.
 */
public int analyzeClass(final String name, final byte[] buffer, final int off, final int len) {
    ClassReader reader = new ClassReader(buffer, off, len);
    ClassWriter writer = new ClassWriter(reader, 0);
    final ClassAnalyzer classAnalyzer = new ClassAnalyzer();
    reader.accept(classAnalyzer, 0);
    return classAnalyzer.getState();
}

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From source file:com.google.code.jtracert.instrument.impl.asm.JTracertASMByteCodeTransformer.java

License:Open Source License

/**
 * @param originalBytes/*from w ww  .j  a  va2  s  . c  om*/
 * @param offset
 * @param length
 * @return
 * @throws ByteCodeTransformException
 */
@Override
public byte[] transform(byte[] originalBytes, int offset, int length, boolean instrumentClass)
        throws ByteCodeTransformException {

    try {

        ClassReader classReader = new ClassReader(originalBytes, offset, length);

        ClassWriter classWriter = new ClassWriter(classReader, ClassWriter.COMPUTE_MAXS);

        ClassVisitor classVisitor;
        classVisitor = new JTracertClassAdapter(classWriter, getInstrumentationProperties(), instrumentClass);

        classReader.accept(classVisitor, ClassReader.SKIP_FRAMES);

        byte[] transformedBytes = classWriter.toByteArray();

        //dumpBytes(transformedBytes);

        return transformedBytes;

    } catch (Throwable e) {
        throw new ByteCodeTransformException(e);
    }

}

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From source file:com.ifedorenko.m2e.sourcelookup.javaagent.ClassfileTransformer.java

License:Open Source License

public byte[] transform(byte[] classfileBuffer, final String location) {

    final ClassReader r = new ClassReader(classfileBuffer, 0, classfileBuffer.length);
    final ClassWriter w = new ClassWriter(0);

    r.accept(new ClassVisitor(Opcodes.ASM5, w) {
        public void visitSource(String source, String debug) {
            String javaSource = source;
            if (debug != null) {
                System.err.println("m2e SMAP merge is not supported!");
                System.err.println(debug);
            } else {
                StringBuilder smap = new StringBuilder();
                smap.append("SMAP\n");
                smap.append(javaSource).append("\n");
                smap.append("Java\n"); // default strata name
                smap.append("*S m2e\n");
                smap.append("*F\n");
                smap.append("1 ").append(source).append("\n");
                smap.append("2 ").append(location).append("\n");
                // JSR-045, StratumSection
                // "One FileSection and one LineSection (in either order) must follow the StratumSection"
                smap.append("*L\n");
                smap.append("*E\n");
                debug = smap.toString();
            }//from   ww  w  .  j a  v a 2 s  .  c  om

            super.visitSource(javaSource, debug);
        };

    }, 0);

    return w.toByteArray();
}

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