/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.jmeter.functions;

import java.io.Serializable;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;

import org.apache.jmeter.engine.util.CompoundVariable;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.samplers.Sampler;
import org.apache.jmeter.threads.JMeterVariables;
import org.apache.jmeter.util.JMeterUtils;

public class MachineName extends AbstractFunction implements Serializable {

    private static final List desc = new LinkedList();

    private static final String KEY = "__machineName"; //$NON-NLS-1$

    static {
        // desc.add("Use fully qualified host name: TRUE/FALSE (Default FALSE)");
        desc.add(JMeterUtils.getResString("function_name_paropt")); //$NON-NLS-1$
    }

    private Object[] values;

    public MachineName() {
    }

    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

    public synchronized String execute(SampleResult previousResult, Sampler currentSampler)
            throws InvalidVariableException {

        /*
         * boolean fullHostName = false; if (((CompoundFunction) values[0])
         * .execute() .toLowerCase() .equals("true")) { fullHostName = true; }
         */

        String machineName = JMeterUtils.getLocalHostName();
        
        if (values.length >= 1){// we have a variable name
            JMeterVariables vars = getVariables();
            if (vars != null) {// May be null if function is used on TestPlan
                String varName = ((CompoundVariable) values[0]).execute().trim();
                if (varName.length() > 0) {
                    vars.put(varName, machineName);
                }
            }
        }
        return machineName;

    }

    public synchronized void setParameters(Collection parameters) throws InvalidVariableException {
        checkParameterCount(parameters, 0, 1);
        values = parameters.toArray();
    }

    public String getReferenceKey() {
        return KEY;
    }

    public List getArgumentDesc() {
        return desc;
    }
}
