forked from JavaTX/JavaCompilerCore
72 lines
3.0 KiB
Java
72 lines
3.0 KiB
Java
package bcelifier;
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import org.apache.commons.bcel6.generic.*;
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import de.dhbwstuttgart.syntaxtree.type.RefType;
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import de.dhbwstuttgart.bytecode.ClassGenerator;
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import de.dhbwstuttgart.bytecode.MethodGenerator;
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import de.dhbwstuttgart.typeinference.TypeinferenceResults;
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import org.apache.commons.bcel6.*;
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import java.io.*;
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public class IfStatementCreator {
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private InstructionFactory _factory;
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private ConstantPoolGen _cp;
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private ClassGenerator _cg;
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public IfStatementCreator() {
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TypeinferenceResults typeinferenceResults = null;
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_cg = new ClassGenerator("bcelifier.IfStatement", new RefType("java.lang.Object", null, 0), "IfStatement.java", Const.ACC_SUPER, new String[] { }, typeinferenceResults);
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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 MethodGenerator(0, Type.VOID, new Type[] { new ObjectType("java.lang.Boolean") }, new String[] { "arg0" }, "<init>", "bcelifier.IfStatement", 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, Const.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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}
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private void createMethod_1() {
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InstructionList il = new InstructionList();
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MethodGen method = new MethodGenerator(0, new ObjectType("java.lang.Integer"), new Type[] { new ObjectType("java.lang.Boolean") }, new String[] { "arg0" }, "methode", "bcelifier.IfStatement", il, _cp);
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il.append(InstructionFactory.createLoad(Type.OBJECT, 1));
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il.append(_factory.createInvoke("java.lang.Boolean", "booleanValue", Type.BOOLEAN, Type.NO_ARGS, Const.INVOKEVIRTUAL));
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BranchInstruction ifeq_4 = InstructionFactory.createBranchInstruction(Const.IFEQ, null);
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il.append(ifeq_4);
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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 }, Const.INVOKESTATIC));
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il.append(InstructionFactory.createReturn(Type.OBJECT));
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InstructionHandle ih_12 = il.append(new PUSH(_cp, 2));
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il.append(_factory.createInvoke("java.lang.Integer", "valueOf", new ObjectType("java.lang.Integer"), new Type[] { Type.INT }, Const.INVOKESTATIC));
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il.append(InstructionFactory.createReturn(Type.OBJECT));
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ifeq_4.setTarget(ih_12);
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method.setMaxStack();
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method.setMaxLocals();
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_cg.addMethod(method.getMethod());
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}
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public static void main(String[] args) throws Exception {
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bcelifier.IfStatementCreator creator = new bcelifier.IfStatementCreator();
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creator.create(new FileOutputStream("bcelifier.IfStatement.class"));
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System.out.println("bcelifier.IfStatement.class");
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}
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}
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