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138 lines
4.4 KiB
138 lines
4.4 KiB
/* |
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* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved. |
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* |
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* This software is open source. |
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* See the bottom of this file for the licence. |
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*/ |
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package org.dom4j.rule; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import org.dom4j.Node; |
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/** |
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* <p> |
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* <code>RuleSet</code> manages a set of rules which are sorted in order of |
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* relevance according to the XSLT defined conflict resolution policy. This |
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* makes finding the correct rule for a DOM4J Node using the XSLT processing |
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* model efficient as the rules can be evaluated in order of priority. |
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* </p> |
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* |
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* @author <a href="mailto:james.strachan@metastuff.com">James Strachan </a> |
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* @version $Revision: 1.10 $ |
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*/ |
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public class RuleSet { |
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/** An unordered list of Rule objects */ |
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private ArrayList<Rule> rules = new ArrayList<Rule>(); |
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/** A lazily evaluated and cached array of rules sorted */ |
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private Rule[] ruleArray; |
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public RuleSet() { |
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} |
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public String toString() { |
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return super.toString() + " [RuleSet: " + rules + " ]"; |
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} |
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/** |
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* Performs an XSLT processing model match for the rule which matches the |
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* given Node the best. |
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* |
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* @param node |
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* is the DOM4J Node to match against |
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* |
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* @return the matching Rule or no rule if none matched |
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*/ |
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public Rule getMatchingRule(Node node) { |
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Rule[] matches = getRuleArray(); |
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for (int i = matches.length - 1; i >= 0; i--) { |
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Rule rule = matches[i]; |
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if (rule.matches(node)) { |
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return rule; |
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} |
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} |
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return null; |
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} |
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public void addRule(Rule rule) { |
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rules.add(rule); |
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ruleArray = null; |
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} |
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public void removeRule(Rule rule) { |
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rules.remove(rule); |
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ruleArray = null; |
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} |
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/** |
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* Adds all the rules to this RuleSet from the given other rule set. |
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* |
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* @param that |
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* DOCUMENT ME! |
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*/ |
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public void addAll(RuleSet that) { |
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rules.addAll(that.rules); |
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ruleArray = null; |
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} |
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/** |
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* Returns an array of sorted rules. |
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* |
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* @return the rules as a sorted array in ascending precendence so that the |
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* rules at the end of the array should be used first |
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*/ |
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protected Rule[] getRuleArray() { |
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if (ruleArray == null) { |
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Collections.sort(rules); |
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int size = rules.size(); |
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ruleArray = new Rule[size]; |
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rules.toArray(ruleArray); |
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} |
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return ruleArray; |
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} |
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} |
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/* |
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* Redistribution and use of this software and associated documentation |
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* ("Software"), with or without modification, are permitted provided that the |
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* following conditions are met: |
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* |
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* 1. Redistributions of source code must retain copyright statements and |
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* notices. Redistributions must also contain a copy of this document. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* |
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* 3. The name "DOM4J" must not be used to endorse or promote products derived |
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* from this Software without prior written permission of MetaStuff, Ltd. For |
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* written permission, please contact dom4j-info@metastuff.com. |
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* |
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* 4. Products derived from this Software may not be called "DOM4J" nor may |
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* "DOM4J" appear in their names without prior written permission of MetaStuff, |
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* Ltd. DOM4J is a registered trademark of MetaStuff, Ltd. |
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* |
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* 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org |
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* |
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* THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE |
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved. |
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*/
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