001/**
002The contents of this file are subject to the Mozilla Public License Version 1.1 
003(the "License"); you may not use this file except in compliance with the License. 
004You may obtain a copy of the License at http://www.mozilla.org/MPL/ 
005Software distributed under the License is distributed on an "AS IS" basis, 
006WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the 
007specific language governing rights and limitations under the License. 
008
009The Original Code is "ValidationContextImpl.java".  Description: 
010"A default implementation of ValidationContext." 
011
012The Initial Developer of the Original Code is University Health Network. Copyright (C) 
0132004.  All Rights Reserved. 
014
015Contributor(s): ______________________________________. 
016
017Alternatively, the contents of this file may be used under the terms of the 
018GNU General Public License (the  �GPL�), in which case the provisions of the GPL are 
019applicable instead of those above.  If you wish to allow use of your version of this 
020file only under the terms of the GPL and not to allow others to use your version 
021of this file under the MPL, indicate your decision by deleting  the provisions above 
022and replace  them with the notice and other provisions required by the GPL License.  
023If you do not delete the provisions above, a recipient may use your version of 
024this file under either the MPL or the GPL. 
025 */
026package ca.uhn.hl7v2.validation.impl;
027
028import java.io.Serializable;
029import java.util.ArrayList;
030import java.util.List;
031
032import ca.uhn.hl7v2.model.Primitive;
033import ca.uhn.hl7v2.validation.EncodingRule;
034import ca.uhn.hl7v2.validation.MessageRule;
035import ca.uhn.hl7v2.validation.PrimitiveTypeRule;
036import ca.uhn.hl7v2.validation.Rule;
037import ca.uhn.hl7v2.validation.ValidationContext;
038
039/**
040 * A default implementation of <code>ValidationContext</code>.
041 * 
042 * @author <a href="mailto:bryan.tripp@uhn.on.ca">Bryan Tripp</a>
043 * @author Christian Ohr
044 */
045@SuppressWarnings("serial")
046public class ValidationContextImpl implements ValidationContext, Serializable {
047
048        private List<RuleBinding<PrimitiveTypeRule>> myPrimitiveRuleBindings;
049        private List<RuleBinding<MessageRule>> myMessageRuleBindings;
050        private List<RuleBinding<EncodingRule>> myEncodingRuleBindings;
051
052        public ValidationContextImpl() {
053                myPrimitiveRuleBindings = new ArrayList<RuleBinding<PrimitiveTypeRule>>();
054                myMessageRuleBindings = new ArrayList<RuleBinding<MessageRule>>();
055                myEncodingRuleBindings = new ArrayList<RuleBinding<EncodingRule>>();
056        }
057
058        /**
059         * @see ca.uhn.hl7v2.validation.ValidationContext#getDataTypeRules(java.lang.String,
060         *      java.lang.String)
061         * @param theType ignored
062         */
063        public PrimitiveTypeRule[] getPrimitiveRules(String theVersion, String theTypeName, Primitive theType) {
064                return getRules(myPrimitiveRuleBindings, theVersion, theTypeName, PrimitiveTypeRule.class);
065        }
066
067        /**
068         * @return a List of <code>RuleBinding</code>s for
069         *         <code>PrimitiveTypeRule</code>s.
070         */
071        public List<RuleBinding<PrimitiveTypeRule>> getPrimitiveRuleBindings() {
072                return myPrimitiveRuleBindings;
073        }
074                
075
076        /**
077         * @see ca.uhn.hl7v2.validation.ValidationContext
078         *      #getMessageRules(java.lang.String, java.lang.String,
079         *      java.lang.String)
080         */
081        public MessageRule[] getMessageRules(String theVersion, String theMessageType, String theTriggerEvent) {
082                return getRules(myMessageRuleBindings, theVersion, theMessageType + "^" + theTriggerEvent, MessageRule.class);
083        }
084
085        /**
086         * @return a List of <code>RuleBinding</code>s for <code>MessageRule</code>s.
087         */
088        public List<RuleBinding<MessageRule>> getMessageRuleBindings() {
089                return myMessageRuleBindings;
090        }
091
092        /**
093         * @see ca.uhn.hl7v2.validation.ValidationContext#getEncodingRules(java.lang.String,
094         *      java.lang.String)
095         */
096        public EncodingRule[] getEncodingRules(String theVersion, String theEncoding) {
097                return getRules(myEncodingRuleBindings, theVersion, theEncoding, EncodingRule.class);
098        }
099
100        /**
101         * @return a List of <code>RuleBinding</code>s for <code>EncodingRule</code>s.
102         */
103        public List<RuleBinding<EncodingRule>> getEncodingRuleBindings() {
104                return myEncodingRuleBindings;
105        }
106        
107        private <T extends Rule> T[] getRules(List<RuleBinding<T>> bindings, String version, String scope,
108                        Class<T> ruleClass) {
109                List<T> active = new ArrayList<T>(bindings.size());
110                for (RuleBinding<T> binding : bindings) {
111                        if (applies(binding, version, scope))
112                                active.add(binding.getRule());
113                }
114                return toArray(active, ruleClass);
115        }
116
117        private boolean applies(RuleBinding<?> binding, String version, String scope) {
118                return (binding.getActive() && binding.appliesToVersion(version) && binding.appliesToScope(scope));
119        }
120
121        @SuppressWarnings("unchecked")
122        private <T> T[] toArray(List<T> list, Class<T> c) {
123                return list.toArray((T[]) java.lang.reflect.Array.newInstance(c, list.size()));
124        }
125
126}