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1 package org.drools.tags.rule; 2 3 /* 4 $Id: DurationTag.java,v 1.2 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.rule.Rule; 53 import org.drools.spi.Duration; 54 55 /*** Construct a <code>Duration</code> for a <code>Rule</code>. 56 * 57 * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a> 58 * 59 * @version $Id: DurationTag.java,v 1.2 2003/03/25 19:47:32 tdiesler Exp $ 60 */ 61 public class DurationTag extends RuleTagSupport 62 { 63 // ------------------------------------------------------------ 64 // Instance members 65 // ------------------------------------------------------------ 66 67 /*** The duration.*/ 68 private Duration duration; 69 70 /*** The variable. */ 71 private String var; 72 73 // ------------------------------------------------------------ 74 // Constructors 75 // ------------------------------------------------------------ 76 77 /*** Construct. 78 */ 79 public DurationTag() 80 { 81 this.duration = null; 82 } 83 84 // ------------------------------------------------------------ 85 // Instance members 86 // ------------------------------------------------------------ 87 88 /*** Set the <code>Duration</code>. 89 * 90 * @param duration The duration. 91 */ 92 protected void setDuration(Duration duration) 93 { 94 this.duration = duration; 95 } 96 97 /*** Retrieve the <code>Duration</code>. 98 * 99 * @return The duration. 100 */ 101 public Duration getDuration() 102 { 103 return this.duration; 104 } 105 106 /*** Set the variable in which to store the <code>Duration</code>. 107 * 108 * @param var The variable name. 109 */ 110 public void setVar(String var) 111 { 112 this.var = var; 113 } 114 115 /*** Retrieve the variable in which to store the <code>Duration</code>. 116 * 117 * @return The variable name. 118 */ 119 public String getVar() 120 { 121 return this.var; 122 } 123 124 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 125 // org.apache.commons.jelly.Tag 126 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 127 128 /*** Perform this tag. 129 * 130 * @param output The output sink. 131 * 132 * @throws JellyTagException If an error occurs while attempting 133 * to perform this tag. 134 */ 135 public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException 136 { 137 Rule rule = getRule(); 138 139 if ( rule == null ) 140 { 141 throw new JellyTagException( "No rule available" ); 142 } 143 144 invokeBody( output ); 145 146 if ( this.duration == null ) 147 { 148 throw new JellyTagException( "Duration expected" ); 149 } 150 151 if ( this.var != null ) 152 { 153 getContext().setVariable( this.var, 154 this.duration ); 155 } 156 157 rule.setDuration( this.duration ); 158 159 this.duration = null; 160 } 161 }

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