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Groovy example source code file (LongArrayGetAtMetaMethod.java)

This example Groovy source code file (LongArrayGetAtMetaMethod.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

arr_class, cachedclass, cachedclass, class, class, integer, metaclassimpl, metamethod, mypojometamethodsite, mypojometamethodsite, object, object, pojometamethodsite, throwable

The Groovy LongArrayGetAtMetaMethod.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 LongArrayGetAtMetaMethod extends ArrayGetAtMetaMethod {
    private static final CachedClass ARR_CLASS = ReflectionCache.getCachedClass(long[].class);

    public Class getReturnType() {
        return Long.class;
    }

    public final CachedClass getDeclaringClass() {
        return ARR_CLASS;
    }

    public Object invoke(Object object, Object[] args) {
        final long[] objects = (long[]) object;
        return objects[normaliseIndex((Integer) args[0], objects.length)];
    }

    public CallSite createPojoCallSite(CallSite site, MetaClassImpl metaClass, MetaMethod metaMethod, Class[] params, Object receiver, Object[] args) {
        if (!(args[0] instanceof Integer))
            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 arg) throws Throwable {
            if ((receiver instanceof long[] && arg instanceof Integer)
                    && checkPojoMetaClass()) {
                final long[] objects = (long[]) receiver;
                return objects[normaliseIndex((Integer) arg, objects.length)];
            } else
                return super.call(receiver, arg);
        }
    }
}

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