package.java

jboss规则引擎

package org.drools.decisiontable.model;

/*
 * Copyright 2005 JBoss Inc
 * 
 * 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.
 */

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 package of rules once it has
 * been parsed from the spreadsheet. Also is the launching point for dumping out
 * the DRL.
 */
public class Package
    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 Package(final String name) {
        this._name = name;
        this._imports = new LinkedList();
        this._variables = new LinkedList();
        this._rules = new LinkedList();
        this._functions = new Functions();
    }

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

    public void addVariable(final Global varz) {
        this._variables.add( varz );
    }

    public void addRule(final Rule rule) {
        this._rules.add( rule );
    }

    public void addFunctions(final String listing) {
        this._functions.setFunctionsListing( listing );
    }

    public String getName() {
        return this._name;
    }

    public List getImports() {
        return this._imports;
    }

    public List getVariables() {
        return this._variables;
    }

    public List getRules() {
        return this._rules;
    }

    public void renderDRL(final DRLOutput out) {
        out.writeLine( "package " + this._name.replace( ' ',
                                                   '_' ) + ";" );
        out.writeLine( "#generated from Decision Table" );
        renderDRL( this._imports,
                   out );
        renderDRL( this._variables,
                   out );
        this._functions.renderDRL( out );
        renderDRL( this._rules,
                   out );

    }

    private void renderDRL(final List list,
                           final DRLOutput out) {
        for ( final Iterator it = list.iterator(); it.hasNext(); ) {
            final DRLJavaEmitter emitter = (DRLJavaEmitter) it.next();
            emitter.renderDRL( out );
        }
    }

}