Source Code Cross Referenced for XPath.java in  » Testing » jakarta-jmeter » org » apache » jmeter » functions » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » jakarta jmeter » org.apache.jmeter.functions 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         *
009:         *   http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         * 
017:         */
018:
019:        package org.apache.jmeter.functions;
020:
021:        import java.io.Serializable;
022:        import java.util.Collection;
023:        import java.util.LinkedList;
024:        import java.util.List;
025:
026:        import org.apache.jmeter.engine.util.CompoundVariable;
027:        import org.apache.jmeter.samplers.SampleResult;
028:        import org.apache.jmeter.samplers.Sampler;
029:        import org.apache.jmeter.util.JMeterUtils;
030:        import org.apache.jorphan.logging.LoggingManager;
031:        import org.apache.log.Logger;
032:
033:        // @see org.apache.jmeter.functions.PackageTest for unit tests
034:
035:        /**
036:         * The function represented by this class allows data to be read from XML files.
037:         * Syntax is similar to the CVSRead function. The function allows the test to
038:         * line-thru the nodes in the XML file - one node per each test. E.g. inserting
039:         * the following in the test scripts :
040:         * 
041:         * ${_XPath(c:/BOF/abcd.xml,/xpath/)} // match the (first) node
042:         * ${_XPath(c:/BOF/abcd.xml,/xpath/)} // Go to next match of '/xpath/' expression
043:         * 
044:         * NOTE: A single instance of each different file/expression combination
045:         * is opened and used for all threads.
046:         * 
047:         */
048:        public class XPath extends AbstractFunction implements  Serializable {
049:            private static final Logger log = LoggingManager
050:                    .getLoggerForClass();
051:
052:            // static {
053:            // LoggingManager.setPriority("DEBUG","jmeter");
054:            // LoggingManager.setTarget(new java.io.PrintWriter(System.out));
055:            // }
056:            private static final String KEY = "__XPath"; // Function name //$NON-NLS-1$
057:
058:            private static final List desc = new LinkedList();
059:
060:            private Object[] values; // Parameter list
061:
062:            static {
063:                desc.add(JMeterUtils.getResString("xpath_file_file_name")); //$NON-NLS-1$
064:                desc.add(JMeterUtils.getResString("xpath_expression")); //$NON-NLS-1$
065:            }
066:
067:            public XPath() {
068:            }
069:
070:            public Object clone() throws CloneNotSupportedException {
071:                return super .clone();
072:            }
073:
074:            /**
075:             * @see org.apache.jmeter.functions.Function#execute(SampleResult, Sampler)
076:             */
077:            public synchronized String execute(SampleResult previousResult,
078:                    Sampler currentSampler) throws InvalidVariableException {
079:                String myValue = ""; //$NON-NLS-1$
080:
081:                String fileName = ((org.apache.jmeter.engine.util.CompoundVariable) values[0])
082:                        .execute();
083:                String xpathString = ((org.apache.jmeter.engine.util.CompoundVariable) values[1])
084:                        .execute();
085:
086:                if (log.isDebugEnabled()) {
087:                    log.debug("execute (" + fileName + " " + xpathString
088:                            + ")   ");
089:                }
090:
091:                myValue = XPathWrapper.getXPathString(fileName, xpathString);
092:
093:                if (log.isDebugEnabled()) {
094:                    log.debug("execute value: " + myValue);
095:                }
096:
097:                return myValue;
098:            }
099:
100:            /**
101:             * @see org.apache.jmeter.functions.Function#getArgumentDesc()
102:             */
103:            public List getArgumentDesc() {
104:                return desc;
105:            }
106:
107:            /**
108:             * @see org.apache.jmeter.functions.Function#getReferenceKey()
109:             */
110:            public String getReferenceKey() {
111:                return KEY;
112:            }
113:
114:            /**
115:             * @see org.apache.jmeter.functions.Function#setParameters(Collection)
116:             */
117:            public synchronized void setParameters(Collection parameters)
118:                    throws InvalidVariableException {
119:                log
120:                        .debug("setParameter - Collection.size="
121:                                + parameters.size());
122:
123:                values = parameters.toArray();
124:
125:                if (log.isDebugEnabled()) {
126:                    for (int i = 0; i < parameters.size(); i++) {
127:                        log.debug("i:"
128:                                + ((CompoundVariable) values[i]).execute());
129:                    }
130:                }
131:
132:                if (values.length != 2) {
133:                    throw new InvalidVariableException(
134:                            "Wrong number of parameters; 2 != " + values.length);
135:                }
136:
137:                /*
138:                 * Need to reset the containers for repeated runs; about the only way
139:                 * for functions to detect that a run is starting seems to be the
140:                 * setParameters() call.
141:                 */
142:                XPathWrapper.clearAll();// TODO only clear the relevant entry - if possible...
143:
144:            }
145:        }
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