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1 package org.drools.tags.rule; 2 3 /* 4 $Id: RuleSetTag.java,v 1.6 2003/03/25 19:47:32 tdiesler Exp $ 5 6 Copyright 2002 (C) The Werken Company. All Rights Reserved. 7 8 Redistribution and use of this software and associated documentation 9 ("Software"), with or without modification, are permitted provided 10 that the following conditions are met: 11 12 1. Redistributions of source code must retain copyright 13 statements and notices. Redistributions must also contain a 14 copy of this document. 15 16 2. Redistributions in binary form must reproduce the 17 above copyright notice, this list of conditions and the 18 following disclaimer in the documentation and/or other 19 materials provided with the distribution. 20 21 3. The name "drools" must not be used to endorse or promote 22 products derived from this Software without prior written 23 permission of The Werken Company. For written permission, 24 please contact bob@werken.com. 25 26 4. Products derived from this Software may not be called "drools" 27 nor may "drools" appear in their names without prior written 28 permission of The Werken Company. "drools" is a registered 29 trademark of The Werken Company. 30 31 5. Due credit should be given to The Werken Company. 32 (http://drools.werken.com/). 33 34 THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS 35 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 36 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 37 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 38 THE WERKEN COMPANY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 39 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 40 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 41 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 42 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 43 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 44 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 45 OF THE POSSIBILITY OF SUCH DAMAGE. 46 47 */ 48 49 import org.apache.commons.jelly.JellyTagException; 50 import org.apache.commons.jelly.MissingAttributeException; 51 import org.apache.commons.jelly.XMLOutput; 52 import org.drools.io.RuleSetLoader; 53 import org.drools.rule.RuleSet; 54 import org.drools.tags.knowledge.RuleBaseTag; 55 56 /*** Construct a <code>RuleSet</code>. 57 * 58 * @see RuleSet 59 * 60 * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a> 61 * 62 * @version $Id: RuleSetTag.java,v 1.6 2003/03/25 19:47:32 tdiesler Exp $ 63 */ 64 public class RuleSetTag extends RuleTagSupport 65 { 66 // ------------------------------------------------------------ 67 // Instance members 68 // ------------------------------------------------------------ 69 70 /*** Rule-set name. */ 71 private String name; 72 73 /*** The rule-set. */ 74 private RuleSet ruleSet; 75 76 /*** Var name. */ 77 private String var; 78 79 // ------------------------------------------------------------ 80 // Constructors 81 // ------------------------------------------------------------ 82 83 /*** Construct. 84 */ 85 public RuleSetTag() 86 { 87 // intentionally left blank 88 } 89 90 // ------------------------------------------------------------ 91 // Instance methods 92 // ------------------------------------------------------------ 93 94 /*** Set the <code>RuleSet</code> name. 95 * 96 * @param name The name. 97 */ 98 public void setName(String name) 99 { 100 this.name = name; 101 } 102 103 /*** Retrieve the <code>RuleSet</code> name. 104 * 105 * @return The name. 106 */ 107 public String getName() 108 { 109 return this.name; 110 } 111 112 /*** Set the variable in which to store the <code>RuleSet</code>. 113 * 114 * @param var The variable name. 115 */ 116 public void setVar(String var) 117 { 118 this.var = var; 119 } 120 121 /*** Retrieve the variable in which to store the <code>RuleSet</code>. 122 * 123 * @return The variable name. 124 */ 125 public String getVar() 126 { 127 return this.var; 128 } 129 130 /*** Retrieve the <code>RuleSet</code>. 131 * 132 * @return The rule-set. 133 */ 134 public RuleSet getRuleSet() 135 { 136 return this.ruleSet; 137 } 138 139 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 140 // org.apache.commons.jelly.Tag 141 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 142 143 /*** Perform this tag. 144 * 145 * @param output The output sink. 146 * 147 * @throws JellyTagException If an error occurs while attempting 148 * to perform this tag. 149 */ 150 public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException 151 { 152 requiredAttribute( "name", 153 this.name ); 154 155 this.ruleSet = new RuleSet( this.name ); 156 157 if ( this.var != null ) 158 { 159 getContext().setVariable( this.var, 160 this.ruleSet ); 161 } 162 163 getContext().setVariable( "org.drools.ruleset", 164 this.ruleSet ); 165 166 invokeBody( output ); 167 168 RuleSetLoader loader = (RuleSetLoader) getContext().getVariable( "org.drools.io.RuleSetLoader" ); 169 170 if ( loader != null ) 171 { 172 loader.addRuleSet( this.ruleSet ); 173 } 174 175 RuleBaseTag tag = (RuleBaseTag) findAncestorWithClass( RuleBaseTag.class ); 176 177 if ( tag != null ) 178 { 179 tag.addRuleSet( this.ruleSet ); 180 } 181 } 182 }

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