| /* |
| $Id$ |
| |
| Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. |
| |
| Redistribution and use of this software and associated documentation |
| ("Software"), with or without modification, are permitted provided |
| that the following conditions are met: |
| |
| 1. Redistributions of source code must retain copyright |
| statements and notices. Redistributions must also contain a |
| copy of this document. |
| |
| 2. Redistributions in binary form must reproduce the |
| above copyright notice, this list of conditions and the |
| following disclaimer in the documentation and/or other |
| materials provided with the distribution. |
| |
| 3. The name "groovy" must not be used to endorse or promote |
| products derived from this Software without prior written |
| permission of The Codehaus. For written permission, |
| please contact info@codehaus.org. |
| |
| 4. Products derived from this Software may not be called "groovy" |
| nor may "groovy" appear in their names without prior written |
| permission of The Codehaus. "groovy" is a registered |
| trademark of The Codehaus. |
| |
| 5. Due credit should be given to The Codehaus - |
| http://groovy.codehaus.org/ |
| |
| THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS |
| ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT |
| NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| */ |
| package org.codehaus.groovy.classgen; |
| |
| import java.lang.reflect.Method; |
| |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| import org.objectweb.asm.Type; |
| |
| /** |
| * A helper class to invoke methods more easily in ASM |
| * |
| * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> |
| * @version $Revision$ |
| */ |
| 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); |
| } |
| |
| 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()); |
| } |
| |
| public String getMethodDescriptor() { |
| if (methodDescriptor == null) { |
| Method method = getMethod(); |
| methodDescriptor = Type.getMethodDescriptor(method); |
| } |
| return methodDescriptor; |
| } |
| |
| protected Method getMethod() { |
| Method[] methods = theClass.getMethods(); |
| for (int i = 0; i < methods.length; i++) { |
| Method method = methods[i]; |
| if (method.getName().equals(name)) { |
| return method; |
| } |
| } |
| throw new ClassGeneratorException("Could not find method: " + name + " on class: " + theClass); |
| } |
| } |