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/*
 * Copyright 2003-2010 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.callsite;

import groovy.lang.GroovyRuntimeException;

import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.runtime.NullObject;
import org.codehaus.groovy.runtime.ScriptBytecodeAdapter;

public final class NullCallSite extends AbstractCallSite {
    public NullCallSite(CallSite callSite) {
        super(callSite);
    }

    public Object call(Object receiver, Object[] args) throws Throwable {
        if (receiver == null) {
            try{
                return CallSiteArray.defaultCall(this, NullObject.getNullObject(), args);
            } catch (GroovyRuntimeException gre) {
                throw ScriptBytecodeAdapter.unwrap(gre);
            }
        } else {
            return CallSiteArray.defaultCall(this, receiver, args);
        }
    }
    
    public Object getProperty(Object receiver) throws Throwable {
        if (receiver == null) {
            try{
                return InvokerHelper.getProperty(NullObject.getNullObject(), name);
            } catch (GroovyRuntimeException gre) {
                throw ScriptBytecodeAdapter.unwrap(gre);
            }
        } else {
            return acceptGetProperty(receiver).getProperty(receiver);
        }
    }
}