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Groovy example source code file (ByteArrayPutAtMetaMethod.java)

This example Groovy source code file (ByteArrayPutAtMetaMethod.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

byte, byte, bytearrayputatmetamethod, cachedclass, cachedclass, integer, integer, metaclassimpl, metamethod, mypojometamethodsite, object, object, param_class_arr, throwable

The Groovy ByteArrayPutAtMetaMethod.java source code

/*
 * 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.dgmimpl.arrays;

import groovy.lang.MetaClassImpl;
import groovy.lang.MetaMethod;
import org.codehaus.groovy.reflection.CachedClass;
import org.codehaus.groovy.reflection.ReflectionCache;
import org.codehaus.groovy.runtime.callsite.CallSite;
import org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite;

public class ByteArrayPutAtMetaMethod extends ArrayPutAtMetaMethod {
    private static final CachedClass OBJECT_CLASS = ReflectionCache.OBJECT_CLASS;
    private static final CachedClass ARR_CLASS = ReflectionCache.getCachedClass(byte[].class);
    private static final CachedClass[] PARAM_CLASS_ARR = new CachedClass[]{INTEGER_CLASS, OBJECT_CLASS};

    public ByteArrayPutAtMetaMethod() {
        parameterTypes = PARAM_CLASS_ARR;
    }

    public final CachedClass getDeclaringClass() {
        return ARR_CLASS;
    }

    public Object invoke(Object object, Object[] args) {
        final byte[] objects = (byte[]) object;
        final int index = normaliseIndex((Integer) args[0], objects.length);
        Object newValue = args[1];
        if (!(newValue instanceof Byte)) {
            objects[index] = ((Number) newValue).byteValue();
        } else
            objects[index] = (Byte) args[1];
        return null;
    }

    public CallSite createPojoCallSite(CallSite site, MetaClassImpl metaClass, MetaMethod metaMethod, Class[] params, Object receiver, Object[] args) {
        if (!(args[0] instanceof Integer) || !(args[1] instanceof Byte))
            return PojoMetaMethodSite.createNonAwareCallSite(site, metaClass, metaMethod, params, args);
        else
            return new MyPojoMetaMethodSite(site, metaClass, metaMethod, params);
    }

    private static class MyPojoMetaMethodSite extends PojoMetaMethodSite {
        public MyPojoMetaMethodSite(CallSite site, MetaClassImpl metaClass, MetaMethod metaMethod, Class[] params) {
            super(site, metaClass, metaMethod, params);
        }

        public Object call(Object receiver, Object[] args) throws Throwable {
            if ((receiver instanceof byte[] && args[0] instanceof Integer && args[1] instanceof Byte)
                    && checkPojoMetaClass()) {
                final byte[] objects = (byte[]) receiver;
                objects[normaliseIndex((Integer) args[0], objects.length)] = (Byte) args[1];
                return null;
            } else
                return super.call(receiver, args);
        }

        public Object call(Object receiver, Object arg1, Object arg2) throws Throwable {
            if (checkPojoMetaClass()) {
                try {
                    final byte[] objects = (byte[]) receiver;
                    objects[normaliseIndex((Integer) arg1, objects.length)] = (Byte) arg2;
                    return null;
                }
                catch (ClassCastException e) {
                    if ((receiver instanceof byte[]) && (arg1 instanceof Integer))
                        throw e;
                }
            }
            return super.call(receiver, arg1, arg2);
        }
    }
}

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