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/*
 * 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 ShortArrayGetAtMetaMethod extends ArrayGetAtMetaMethod {
    private static final CachedClass ARR_CLASS = ReflectionCache.getCachedClass(short[].class);

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

    public final CachedClass getDeclaringClass() {
        return ARR_CLASS;
    }

    public Object invoke(Object object, Object[] args) {
        final short[] objects = (short[]) 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 short[] && arg instanceof Integer)
                    && checkPojoMetaClass()) {
                final short[] objects = (short[]) receiver;
                return objects[normaliseIndex((Integer) arg, objects.length)];
            } else
                return super.call(receiver, arg);
        }
    }
}