| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.codehaus.groovy.classgen.asm; |
| |
| import org.codehaus.groovy.classgen.ClassGeneratorException; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| import org.objectweb.asm.Type; |
| |
| import java.lang.reflect.Method; |
| |
| /** |
| * A helper class to invoke methods more easily in ASM |
| */ |
| public class MethodCaller implements Opcodes { |
| |
| private int opcode; |
| private String internalName; |
| private String name; |
| private Class theClass; |
| private String methodDescriptor; |
| |
| public static MethodCaller newStatic(Class theClass, String name) { |
| return new MethodCaller(INVOKESTATIC, theClass, name); |
| } |
| |
| public static MethodCaller newInterface(Class theClass, String name) { |
| return new MethodCaller(INVOKEINTERFACE, theClass, name); |
| } |
| |
| public static MethodCaller newVirtual(Class theClass, String name) { |
| return new MethodCaller(INVOKEVIRTUAL, theClass, name); |
| } |
| |
| /** |
| * @since 2.5.0 |
| */ |
| protected MethodCaller() {} |
| |
| public MethodCaller(int opcode, Class theClass, String name) { |
| this.opcode = opcode; |
| this.internalName = Type.getInternalName(theClass); |
| this.theClass = theClass; |
| this.name = name; |
| |
| } |
| |
| public void call(MethodVisitor methodVisitor) { |
| methodVisitor.visitMethodInsn(opcode, internalName, name, getMethodDescriptor(), opcode == Opcodes.INVOKEINTERFACE); |
| } |
| |
| public String getMethodDescriptor() { |
| if (methodDescriptor == null) { |
| Method method = getMethod(); |
| methodDescriptor = Type.getMethodDescriptor(method); |
| } |
| return methodDescriptor; |
| } |
| |
| protected Method getMethod() { |
| Method[] methods = theClass.getMethods(); |
| for (Method method : methods) { |
| if (method.getName().equals(name)) { |
| return method; |
| } |
| } |
| throw new ClassGeneratorException("Could not find method: " + name + " on class: " + theClass); |
| } |
| } |