Coverage Report - org.apache.commons.betwixt.strategy.DefaultIdStoringStrategy

Classes in this File	Line Coverage	Branch Coverage	Complexity
DefaultIdStoringStrategy	100%	100%	1.1666666666666667;1.167

1		/*
2		* Copyright 2005 The Apache Software Foundation.
3		*
4		* Licensed under the Apache License, Version 2.0 (the "License");
5		* you may not use this file except in compliance with the License.
6		* You may obtain a copy of the License at
7		*
8		* http://www.apache.org/licenses/LICENSE-2.0
9		*
10		* Unless required by applicable law or agreed to in writing, software
11		* distributed under the License is distributed on an "AS IS" BASIS,
12		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13		* See the License for the specific language governing permissions and
14		* limitations under the License.
15		*/
16
17		package org.apache.commons.betwixt.strategy;
18
19		import java.util.HashMap;
20		import java.util.Map;
21
22		import org.apache.commons.betwixt.expression.Context;
23
24		/**
25		* <p>Stores every ID that given to it into an internal <code>HashMap</code> and
26		* returns it on request.
27		* </p><p>
28		* {@link #DefaultIdStoringStrategy(Map, Map)} allows the implementations
29		* to be specified.
30		* For example, those who want to use identity (rather than equality)
31		* should pass a <code>IdentityHashMap</code> instance.
32		* </p>
33		*
34		* @author <a href="mailto:christian@wilde-welt.de">Christian Aust</a>
35		* @since 0.7
36		*/
37		public class DefaultIdStoringStrategy extends IdStoringStrategy {
38		private Map idByBeanMap;
39		private Map beanByIdMap;
40
41		/**
42		* Constructs a {@link IdStoringStrategy} using a <code>HashMap</code> for
43		* storage.
44		*/
45	1047	public DefaultIdStoringStrategy() {
46	4597	this(new HashMap(), new HashMap());
47	3550	}
48
49		/**
50		* Constructs a {@link IdStoringStrategy}using the <code>Map</code>
51		* implementations provided for storage.
52		*
53		* @param idByBeanMap <code>Map</code> implementation stores the ID's by bean
54		* @param beanByIdMap <code>Map</code> implementation stores the bean's by ID
55	1047	*/
56	4597	public DefaultIdStoringStrategy(Map idByBeanMap, Map beanByIdMap) {
57	4597	this.idByBeanMap = idByBeanMap;
58	4597	this.beanByIdMap = beanByIdMap;
59	3550	}
60
61
62		/**
63		* Returns a String id for the given bean if it has been stored previously.
64		* Otherwise returns null.
65		*
66		* @param context
67		* current context, not null
68		* @param bean
69		* the instance, not null
70		* @return id as String, or null if not found
71		* @see org.apache.commons.betwixt.strategy.IdStoringStrategy#getReferenceFor(org.apache.commons.betwixt.expression.Context,
72		* java.lang.Object)
73		*/
74	255	public String getReferenceFor(Context context, Object bean) {
75	850	return (String) idByBeanMap.get(bean);
76		}
77
78		/**
79		* Stores an ID for the given instance and context. It will check first if
80		* this ID has been previously stored and will do nothing in that case.
81		*
82		* @param context
83		* current context, not null
84		* @param bean
85		* current instance, not null
86		* @param id
87		* the ID to store
88		* @see org.apache.commons.betwixt.strategy.IdStoringStrategy#setReference(org.apache.commons.betwixt.expression.Context,
89		* java.lang.Object, java.lang.String)
90		*/
91	1869	public void setReference(Context context, Object bean, String id) {
92	8051	if (!idByBeanMap.containsKey(bean)) {
93	7871	idByBeanMap.put(bean, id);
94	6056	beanByIdMap.put(id, bean);
95	1869	}
96	6236	}
97
98		/**
99		* Gets an object matching the given reference.
100		* @param context <code>Context</code>, not null
101		* @param id the reference id
102		* @return an bean matching the given reference,
103		* or null if there is no bean matching the given reference
104		*/
105	6	public Object getReferenced(Context context, String id) {
106	20	return beanByIdMap.get(id);
107		}
108
109		/**
110		* Clears all beans.
111		*/
112	342	public void reset() {
113	1500	idByBeanMap.clear();
114	1500	beanByIdMap.clear();
115	1158	}
116
117
118		}