com.xruby.compiler.codegen.CgUtil.java Source code

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Here is the source code for com.xruby.compiler.codegen.CgUtil.java

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/**
 * Copyright 2007 Ye Zheng
 * Distributed under the BSD License
 */

package com.xruby.compiler.codegen;

import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import org.objectweb.asm.commons.Method;

public class CgUtil {
    public static Method CONSTRUCTOR = new Method("<init>", Type.VOID_TYPE, Types.NULL_TYPE_ARRAY);

    public static String getInternalName(String name) {
        return name.replace(".", "/");
    }

    public static Method getMethod(String method, Type returnType) {
        return new Method(method, returnType, Types.NULL_TYPE_ARRAY);
    }

    public static Method getMethod(String method, Type returnType, Type... params) {
        return new Method(method, returnType, params);
    }

    public static Method getMethod(String method, Class returnType, Class... params) {
        Type[] types = new Type[params.length];
        for (int i = 0; i < params.length; i++) {
            types[i] = Type.getType(params[i]);
        }
        return new Method(method, Type.getType(returnType), types);
    }

    public static void createImplicitConstructor(ClassVisitor cv, Type superType) {
        GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC, CONSTRUCTOR, null, null, cv);
        mg.visitCode();
        mg.loadThis();
        mg.invokeConstructor(superType, CONSTRUCTOR);
        mg.returnValue();
        mg.endMethod();
    }

    private CgUtil() {
    }
}