001: /*
002: * $Id: NewStaticMetaMethod.java 4550 2006-12-21 22:22:40Z blackdrag $
003: *
004: * Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005: *
006: * Redistribution and use of this software and associated documentation
007: * ("Software"), with or without modification, are permitted provided that the
008: * following conditions are met:
009: * 1. Redistributions of source code must retain copyright statements and
010: * notices. Redistributions must also contain a copy of this document.
011: * 2. Redistributions in binary form must reproduce the above copyright
012: * notice, this list of conditions and the following disclaimer in the
013: * documentation and/or other materials provided with the distribution.
014: * 3. The name "groovy" must not be used to endorse or promote products
015: * derived from this Software without prior written permission of The Codehaus.
016: * For written permission, please contact info@codehaus.org.
017: * 4. Products derived from this Software may not be called "groovy" nor may
018: * "groovy" appear in their names without prior written permission of The
019: * Codehaus. "groovy" is a registered trademark of The Codehaus.
020: * 5. Due credit should be given to The Codehaus - http://groovy.codehaus.org/
021: *
022: * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
023: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
024: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
025: * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
026: * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
027: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
028: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
029: * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
030: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
031: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
032: * DAMAGE.
033: *
034: */
035: package org.codehaus.groovy.runtime;
036:
037: import groovy.lang.MetaMethod;
038:
039: /**
040: * A MetaMethod implementation where the underlying method is really a static
041: * helper method on some class.
042: *
043: * This implementation is used to add new static methods to the JDK writing them as normal
044: * static methods with the first parameter being the class on which the method is added.
045: *
046: * @author Guillaume Laforge
047: * @version $Revision: 4550 $
048: */
049: public class NewStaticMetaMethod extends MetaMethod {
050:
051: private static final Class[] EMPTY_TYPE_ARRAY = {};
052:
053: private MetaMethod metaMethod;
054: private Class[] logicalParameterTypes;
055:
056: public NewStaticMetaMethod(MetaMethod metaMethod) {
057: super (metaMethod);
058: this .metaMethod = metaMethod;
059: init();
060: }
061:
062: public NewStaticMetaMethod(String name, Class declaringClass,
063: Class[] parameterTypes, Class returnType, int modifiers) {
064: super (name, declaringClass, parameterTypes, returnType,
065: modifiers);
066: this .metaMethod = new MetaMethod(name, declaringClass,
067: parameterTypes, returnType, modifiers);
068: init();
069: }
070:
071: private void init() {
072: Class[] realParameterTypes = metaMethod.getParameterTypes();
073: int size = realParameterTypes != null ? realParameterTypes.length
074: : 0;
075: if (size <= 1) {
076: logicalParameterTypes = EMPTY_TYPE_ARRAY;
077: } else {
078: logicalParameterTypes = new Class[--size];
079: System.arraycopy(realParameterTypes, 1,
080: logicalParameterTypes, 0, size);
081: }
082: }
083:
084: public Class getDeclaringClass() {
085: return getBytecodeParameterTypes()[0];
086: }
087:
088: public boolean isStatic() {
089: return true;
090: }
091:
092: public int getModifiers() {
093: return super .getModifiers();
094: }
095:
096: public Class[] getParameterTypes() {
097: return logicalParameterTypes;
098: }
099:
100: public Class[] getBytecodeParameterTypes() {
101: return super .getParameterTypes();
102: }
103:
104: public Object invoke(Object object, Object[] arguments) {
105: int size = arguments.length;
106: Object[] newArguments = new Object[size + 1];
107: System.arraycopy(arguments, 0, newArguments, 1, size);
108: newArguments[0] = null;
109: return metaMethod.invoke(null, newArguments);
110: }
111: }
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