Example usage for org.aspectj.apache.bcel.generic ClassGen ClassGen

Introduction

In this page you can find the example usage for org.aspectj.apache.bcel.generic ClassGen ClassGen.

Prototype

public ClassGen(String classname, String superclassname, String filename, int modifiers,
            String[] interfacenames) 

Source Link

Usage

From source file:br.jabuti.instrumenter.bytecode.bcel.ASMInstrumenter.java

License:Open Source License

/** Inserts a peace of code before a given instruction
 * in the specified method./* www .  j a  v a 2  s  . c  om*/
 * 
 * @param ih The instruction before which the code will be inserted
 * @param x A sequence of JVM instructions to be inserted
 * 
 * @throws ParseException If the string <code>x</code> is not a valid
 * sequence of instructions. To the complete definition of what is a 
 * valid sequence see <a href="asm.txt"> the Javacc grammar</a>
 * 
 */
public void insertBefore(InstructionHandle ih, String x) throws ParseException {
    // try once with fake method and class
    // if no exception, do it again
    ClassGen cg2 = new ClassGen("DUMMY", "java/lang/Object", "DUMMY.class", 0, null);
    MethodGen m2 = meth.copy(meth.getClassName(), new ConstantPoolGen());
    ASMParse asmp = new ASMParse(new ByteArrayInputStream(x.getBytes()), m2, cg2);
    InstructionList inedir = asmp.ASMProg();

    // do a second time with the real method and class
    asmp = new ASMParse(new ByteArrayInputStream(x.getBytes()), meth, classGen);
    inedir = asmp.ASMProg();
    // System.out.println(meth.getConstantPool());
    // System.out.println(meth.getConstantPool().getFinalConstantPool());
    insertBefore(ih, inedir);
    meth.setMaxLocals();
    meth.setMaxStack();
}

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From source file:br.jabuti.instrumenter.bytecode.bcel.ASMInstrumenter.java

License:Open Source License

/** Adds a peace of code before a given instruction
 * in the specified method.// ww w  .j  a va2  s. co m
 * 
 * @param ih The instruction before which the code will be inserted
 * @param x A sequence of JVM instructions to be added
 * 
 * @throws ParseException If the string <code>x</code> is not a valid
 * sequence of instructions. To the complete definition of what is a 
 * valid sequence see <a href="asm.txt"> the Javacc grammar</a>
 * 
 */
public void addBefore(InstructionHandle ih, String x) throws ParseException {
    // try once with fake method and class
    // if no exception, do it again
    ClassGen cg2 = new ClassGen("DUMMY", "java/lang/Object", "DUMMY.class", 0, null);
    MethodGen m2 = meth.copy(meth.getClassName(), new ConstantPoolGen());
    ASMParse asmp = new ASMParse(new ByteArrayInputStream(x.getBytes()), m2, cg2);
    InstructionList inedir = asmp.ASMProg();

    // do a second time with the real method and class
    asmp = new ASMParse(new ByteArrayInputStream(x.getBytes()), meth, classGen);
    inedir = asmp.ASMProg();
    // System.out.println(meth.getConstantPool());
    // System.out.println(meth.getConstantPool().getFinalConstantPool());
    addBefore(ih, inedir);
    meth.setMaxLocals();
    meth.setMaxStack();
}

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From source file:br.jabuti.instrumenter.bytecode.bcel.ASMInstrumenter.java

License:Open Source License

/** Inserts a peace of code after a given instruction
 * in the specified method./*from  w ww .  j  ava2 s  .co  m*/
 * 
 * @param ih The instruction before which the code will be inserted
 * @param x A sequence of JVM instructions to be inserted
 * 
 * @throws ParseException If the string <code>x</code> is not a valid
 * sequence of instructions. To the complete definition of what is a 
 * valid sequence see <a href="asm.txt"> the Javacc grammar</a>
 * 
 */
public void insertAfter(InstructionHandle ih, String x) throws ParseException {
    // try once with fake method and class
    // if no exception, do it again
    ClassGen cg2 = new ClassGen("DUMMY", "java/lang/Object", "DUMMY.class", 0, null);
    MethodGen m2 = meth.copy(meth.getClassName(), new ConstantPoolGen());
    ASMParse asmp = new ASMParse(new ByteArrayInputStream(x.getBytes()), m2, cg2);
    InstructionList inedir = asmp.ASMProg();

    // do a second time with the real method and class
    asmp = new ASMParse(new ByteArrayInputStream(x.getBytes()), meth, classGen);
    inedir = asmp.ASMProg();
    // System.out.println(meth.getConstantPool());
    // System.out.println(meth.getConstantPool().getFinalConstantPool());
    insertAfter(ih, inedir);
    meth.setMaxLocals();
    meth.setMaxStack();
}

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