/*
* 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;
// @see PackageTest for unit tests
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;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;
/**
* Function to evaluate a string which may contain variable or function references.
*
* Parameter: string to be evaluated
*
* Returns: the evaluated value
*
*/
public class EvalVarFunction extends AbstractFunction implements Serializable {
private static final long serialVersionUID = 232L;
private static final Logger log = LoggingManager.getLoggerForClass();
private static final List desc = new LinkedList();
private static final String KEY = "__evalVar"; //$NON-NLS-1$
// Number of parameters expected - used to reject invalid calls
private static final int MIN_PARAMETER_COUNT = 1;
private static final int MAX_PARAMETER_COUNT = 1;
static {
desc.add(JMeterUtils.getResString("evalvar_name_param")); //$NON-NLS-1$
}
private Object[] values;
public EvalVarFunction() {
}
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
public synchronized String execute(SampleResult previousResult, Sampler currentSampler)
throws InvalidVariableException {
String variableName = ((CompoundVariable) values[0]).execute();
final JMeterVariables vars = getVariables();
if (vars == null){
log.error("Variables have not yet been defined");
return "**ERROR - see log file**";
}
String variableValue = vars.get(variableName);
CompoundVariable cv = new CompoundVariable(variableValue);
return cv.execute();
}
public synchronized void setParameters(Collection parameters) throws InvalidVariableException {
checkParameterCount(parameters, MIN_PARAMETER_COUNT, MAX_PARAMETER_COUNT);
values = parameters.toArray();
}
public String getReferenceKey() {
return KEY;
}
public List getArgumentDesc() {
return desc;
}
}