1 /*
2 * Copyright 2012-2013 smartics, Kronseder & Reiner GmbH
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 package de.smartics.properties.spi.config.support;
17
18 import java.util.Collection;
19 import java.util.Iterator;
20 import java.util.Map.Entry;
21 import java.util.Properties;
22 import java.util.Set;
23
24 import javax.annotation.concurrent.NotThreadSafe;
25
26 import de.smartics.properties.api.config.domain.Property;
27 import de.smartics.properties.api.config.domain.PropertyCollection;
28 import de.smartics.properties.api.config.domain.PropertyLocation;
29 import de.smartics.util.lang.Arg;
30
31 /**
32 * Implementation of {@link PropertyCollection} based on properties.
33 */
34 @NotThreadSafe
35 public final class PropertiesPropertyCollection implements PropertyCollection
36 {
37 // ********************************* Fields *********************************
38
39 // --- constants ------------------------------------------------------------
40
41 // --- members --------------------------------------------------------------
42
43 /**
44 * The properties to iterate over.
45 */
46 private final Properties properties = new Properties();
47
48 // ****************************** Initializer *******************************
49
50 // ****************************** Constructors ******************************
51
52 /**
53 * Constructor to add properties via a collection.
54 *
55 * @param properties the properties to iterate over.
56 */
57 public PropertiesPropertyCollection(final Collection<Properties> properties)
58 {
59 Arg.checkNotNull("properties", properties);
60
61 for (final Properties element : properties)
62 {
63 this.properties.putAll(element);
64 }
65 }
66
67 /**
68 * Constructor to add properties.
69 *
70 * @param properties the properties to iterate over.
71 */
72 public PropertiesPropertyCollection(final Properties... properties)
73 {
74 Arg.checkNotNull("properties", properties);
75
76 for (final Properties element : properties)
77 {
78 this.properties.putAll(element);
79 }
80 }
81
82 // ****************************** Inner Classes *****************************
83
84 // ********************************* Methods ********************************
85
86 // --- init -----------------------------------------------------------------
87
88 // --- get&set --------------------------------------------------------------
89
90 // --- business -------------------------------------------------------------
91
92 /**
93 * {@inheritDoc}
94 *
95 * @see java.lang.Iterable#iterator()
96 */
97 @Override
98 public Iterator<Property> iterator()
99 {
100 final Set<Entry<Object, Object>> entrySet = properties.entrySet();
101 final Iterator<Entry<Object, Object>> i = entrySet.iterator();
102 // CHECKSTYLE:OFF
103 return new Iterator<Property>() // NOPMD CHECKSTYLE:ON
104 {
105 @Override
106 public boolean hasNext()
107 {
108 return i.hasNext();
109 }
110
111 @Override
112 public Property next()
113 {
114 final Entry<Object, Object> entry = i.next();
115 final Object value = entry.getValue();
116
117 if (value instanceof Property)
118 {
119 return (Property) value;
120 }
121 else
122 {
123 return new Property(new PropertyLocation(getClass().getName()),
124 (String) entry.getKey(), entry.getValue());
125 }
126 }
127
128 @Override
129 public void remove()
130 {
131 throw new UnsupportedOperationException("Remove not supported.");
132 }
133 };
134 }
135
136 @Override
137 public void close()
138 {
139 }
140
141 // --- object basics --------------------------------------------------------
142
143 }