61 lines
2.4 KiB
Java
61 lines
2.4 KiB
Java
package bcelifier;
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import org.apache.commons.bcel6.generic.*;
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import org.apache.commons.bcel6.classfile.*;
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import org.apache.commons.bcel6.*;
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import java.io.*;
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public class NewClassCreator implements Constants {
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private InstructionFactory _factory;
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private ConstantPoolGen _cp;
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private ClassGen _cg;
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public NewClassCreator() {
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_cg = new ClassGen("bcelifier.NewClass", "java.lang.Object", "NewClass.java", ACC_PUBLIC | ACC_SUPER, new String[] { });
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_cp = _cg.getConstantPool();
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_factory = new InstructionFactory(_cg, _cp);
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}
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public void create(OutputStream out) throws IOException {
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createMethod_0();
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createMethod_1();
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_cg.getJavaClass().dump(out);
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}
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private void createMethod_0() {
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InstructionList il = new InstructionList();
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MethodGen method = new MethodGen(ACC_PUBLIC, Type.VOID, new Type[] { new ObjectType("java.lang.Integer") }, new String[] { "arg0" }, "<init>", "bcelifier.NewClass", il, _cp);
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InstructionHandle ih_0 = il.append(_factory.createLoad(Type.OBJECT, 0));
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il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));
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InstructionHandle ih_4 = il.append(_factory.createReturn(Type.VOID));
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method.setMaxStack();
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method.setMaxLocals();
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_cg.addMethod(method.getMethod());
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il.dispose();
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}
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private void createMethod_1() {
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InstructionList il = new InstructionList();
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MethodGen method = new MethodGen(0, Type.VOID, Type.NO_ARGS, new String[] { }, "methode2", "bcelifier.NewClass", il, _cp);
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InstructionHandle ih_0 = il.append(_factory.createNew("bcelifier.NewClass"));
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il.append(InstructionConstants.DUP);
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il.append(new PUSH(_cp, 1));
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il.append(_factory.createInvoke("java.lang.Integer", "valueOf", new ObjectType("java.lang.Integer"), new Type[] { Type.INT }, Constants.INVOKESTATIC));
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il.append(_factory.createInvoke("bcelifier.NewClass", "<init>", Type.VOID, new Type[] { new ObjectType("java.lang.Integer") }, Constants.INVOKESPECIAL));
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il.append(InstructionConstants.POP);
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InstructionHandle ih_12 = il.append(_factory.createReturn(Type.VOID));
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method.setMaxStack();
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method.setMaxLocals();
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_cg.addMethod(method.getMethod());
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il.dispose();
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}
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public static void main(String[] args) throws Exception {
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bcelifier.NewClassCreator creator = new bcelifier.NewClassCreator();
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creator.create(new FileOutputStream("bcelifier.NewClass.class"));
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}
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}
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