| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * Licensed 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.runtime; |
| |
| import groovy.lang.MetaMethod; |
| import org.codehaus.groovy.reflection.ParameterTypes; |
| import org.codehaus.groovy.reflection.CachedClass; |
| |
| /** |
| * A MetaMethod implementation where the underlying method is really a static |
| * helper method on some class. |
| * |
| * This implementation is used to add new static methods to the JDK writing them as normal |
| * static methods with the first parameter being the class on which the method is added. |
| * |
| * @author Guillaume Laforge |
| * @version $Revision$ |
| */ |
| public class NewStaticMetaMethod extends MetaMethod { |
| |
| private static final Class[] EMPTY_TYPE_ARRAY = {}; |
| |
| private MetaMethod metaMethod; |
| private Class[] bytecodeParameterTypes; |
| |
| public NewStaticMetaMethod(MetaMethod metaMethod) { |
| super(metaMethod); |
| this.metaMethod = metaMethod; |
| init(); |
| } |
| |
| public NewStaticMetaMethod(String name, Class declaringClass, CachedClass[] parameterTypes, Class returnType, int modifiers) { |
| super(name, declaringClass, parameterTypes, returnType, modifiers); |
| this.metaMethod = new MetaMethod(name, declaringClass, parameterTypes,returnType, modifiers); |
| init(); |
| } |
| |
| private void init() { |
| bytecodeParameterTypes = metaMethod.getNativeParameterTypes(); |
| int size = bytecodeParameterTypes !=null ? bytecodeParameterTypes.length : 0; |
| Class[] logicalParameterTypes; |
| if (size <= 1) { |
| logicalParameterTypes = EMPTY_TYPE_ARRAY; |
| } else { |
| logicalParameterTypes = new Class[--size]; |
| System.arraycopy(bytecodeParameterTypes, 1, logicalParameterTypes, 0, size); |
| } |
| paramTypes = new ParameterTypes(logicalParameterTypes); |
| } |
| |
| public Class getDeclaringClass() { |
| return getBytecodeParameterTypes()[0]; |
| } |
| |
| public boolean isStatic() { |
| return true; |
| } |
| |
| public int getModifiers() { |
| return super.getModifiers(); |
| } |
| |
| public Class[] getBytecodeParameterTypes() { |
| return bytecodeParameterTypes; |
| } |
| |
| public Object invoke(Object object, Object[] arguments) { |
| int size = arguments.length; |
| Object[] newArguments = new Object[size + 1]; |
| System.arraycopy(arguments, 0, newArguments, 1, size); |
| newArguments[0] = null; |
| return metaMethod.invoke(null, newArguments); |
| } |
| } |