ruleset.java

drools 一个开放源码的规则引擎

package org.drools.decisiontable.model;

/*
 * Copyright 2005 (C) The Werken Company. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 * and/or other materials provided with the distribution.
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 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a registered trademark of The Werken Company.
 *
 * 5. Due credit should be given to The Werken Company.
 * (http://drools.werken.com/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

/**
 * @author <a href="mailto:[e-mail]"> Michael Neale </a>
 * 
 * This is the top of the parse tree. Represents a ruleset once it has been
 * parsed from excel. Also is the launching point for dumping out the DRL.
 */
public class Ruleset
    implements
    DRLJavaEmitter
{

    private String    _name;

    private List      _imports;

    private List      _variables; // List of the application data Variable Objects

    private List      _rules;

    private Functions _functions;

    public Ruleset(String name)
    {
        _name = name;
        _imports = new LinkedList( );
        _variables = new LinkedList( );
        _rules = new LinkedList( );
        _functions = new Functions();
    }

    public void addImport(Import imp)
    {
        _imports.add( imp );
    }

    public void addVariable(Variable varz)
    {
        _variables.add( varz );
    }

    public void addRule(Rule rule)
    {
        _rules.add( rule );
    }
    
    public void addFunctions(String listing) {
        _functions.setFunctionsListing(listing);
    }

    /*
     * (non-Javadoc)
     * 
     * @see mdneale.drools.xls.model.DRLJavaEmitter#toXML()
     */
    public String toXML()
    {
        String xml = "<?xml version=\"1.0\"?> " + "<rule-set name=\"" + _name + "\" " + "xmlns=\"http://drools.org/rules\" " + "xmlns:java=\"http://drools.org/semantics/java\" " + "xmlns:xs=\"http://www.w3.org/2001/XMLSchema-instance\" "
                     + "xs:schemaLocation=\"http://drools.org/rules rules.xsd http://drools.org/semantics/java java.xsd\">";
        xml = xml + "\n";
        xml = xml + generateXml( _imports ) + "\n";
        
        xml = xml + generateXml( _variables ); // add the application data tags

        xml = xml + "\n" + _functions.toXML() + "\n\n";
        
        xml = xml + generateXml( _rules );
        xml = xml + "\n\n\n</rule-set>";
        return xml.trim( );
    }

    /**
     * Uses the JavaEmitter interface to generate the xml.
     */
    private String generateXml(List list)
    {
        StringBuffer buf = new StringBuffer( );
        for ( Iterator it = list.iterator( ); it.hasNext( ); )
        {
            DRLJavaEmitter emitter = (DRLJavaEmitter) it.next( );
            buf.append( emitter.toXML( ) );
        }
        return buf.toString( );
    }

    public String getName()
    {
        return _name;
    }

    public List getImports()
    {
        return _imports;
    }

    public List getVariables()
    {
        return _variables;
    }

    public List getRules()
    {
        return _rules;
    }

}