/*
* Copyright 1999,2004 The Apache Software Foundation.
*
* 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 joran.calculator;
import java.util.List;
import org.apache.joran.Interpreter;
import org.apache.joran.Pattern;
import org.apache.joran.RuleStore;
import org.apache.joran.helper.SimpleRuleStore;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
/**
* This examples illustrates collaboration between multiple actions through the
* common execution context stack.
*
* The first and only argument of this application must be the path to
* the XML file to interpret. There are sample XML files in the
* <em>examples/src/joran/calculator/</em> directory.
*
* For example,
*
<pre>
java joran.calculator.Calculator1 examples/src/joran/calculator/calculator1.xml
</pre>
*
* Please refer to the comments in the source code for more information.
*
* @author Ceki Güulcü
*/
public class Calculator1 {
public static void main(String[] args) throws Exception {
// Create a simple rule store where pattern and action associations will
// be kept. This is a basic requirement before invoking a Joran Interpreter.
RuleStore ruleStore = new SimpleRuleStore();
// Associate "/computation" pattern with ComputationAction1
ruleStore.addRule(new Pattern("/computation"), new ComputationAction1());
// Other associations
ruleStore.addRule(new Pattern("/computation/literal"), new LiteralAction());
ruleStore.addRule(new Pattern("/computation/add"), new AddAction());
ruleStore.addRule(new Pattern("/computation/multiply"), new MultiplyAction());
// Create a new Joran Interpreter and hand it our simple rule store.
Interpreter ji = new Interpreter(ruleStore);
// Create a SAX parser
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser saxParser = spf.newSAXParser();
// Parse the file given as the application's first argument and
// set the SAX ContentHandler to the Joran Interpreter we just created.
saxParser.parse(args[0], ji);
// The file has been parsed and interpreted. We now print any errors that
// might have occured.
List errorList = ji.getExecutionContext().getErrorList();
if(errorList.size() > 0) {
System.out.println("The following errors occured:");
for(int i = 0; i < errorList.size(); i++) {
System.out.println("\t"+errorList.get(i));
}
}
}
}