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20 package org.settings4j.settings;
21
22 import java.util.ArrayList;
23 import java.util.Collections;
24 import java.util.HashMap;
25 import java.util.List;
26 import java.util.Map;
27
28 import org.apache.commons.lang3.StringUtils;
29 import org.apache.commons.lang3.Validate;
30 import org.settings4j.Connector;
31 import org.settings4j.ConnectorPosition;
32 import org.settings4j.ConnectorPositions;
33 import org.settings4j.Settings4jInstance;
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40 public class DefaultSettings implements Settings4jInstance {
41
42
43 private static final org.slf4j.Logger LOG = org.slf4j.LoggerFactory.getLogger(DefaultSettings.class);
44
45 private final List<Connector> connectors = Collections.synchronizedList(new ArrayList<Connector>());
46 private final Map<String, Connector> connectorMap = Collections.synchronizedMap(new HashMap<String, Connector>());
47 private Map<String, String> mapping;
48
49 @Override
50 public List<Connector> getConnectors() {
51 return Collections.unmodifiableList(this.connectors);
52 }
53
54 @Override
55 public Connector getConnector(final String connectorName) {
56 return this.connectorMap.get(connectorName);
57 }
58
59 @Override
60 public void addConnector(final Connector connector) {
61 addConnector(connector, ConnectorPositions.atLast());
62 }
63
64 @Override
65 public void addConnector(final Connector connector, final ConnectorPosition position) {
66 final int pos = position.getPosition(this.connectors);
67 Validate.isTrue(pos != ConnectorPosition.UNKNOWN_POSITION,
68 "No valid Position found to add the given connector.");
69 Validate.isTrue(this.connectorMap.get(connector.getName()) == null,
70 "A connector with the given name '%s' already exists!", connector.getName());
71 this.connectors.add(pos, connector);
72 this.connectorMap.put(connector.getName(), connector);
73
74 }
75
76 @Override
77 public void removeAllConnectors() {
78 this.connectors.clear();
79 this.connectorMap.clear();
80 }
81
82 @Override
83 public byte[] getContent(final String key) {
84 final String mappedKey = mappedKey(key);
85 byte[] result = null;
86 for (final Connector connector : this.connectors) {
87 result = connector.getContent(mappedKey);
88 if (result != null) {
89 logDebugFoundValueForKey("Content", key, connector);
90 return result;
91 }
92 }
93 return result;
94 }
95
96 @Override
97 public Object getObject(final String key) {
98 final String mappedKey = mappedKey(key);
99 Object result = null;
100 for (final Connector connector : this.connectors) {
101 result = connector.getObject(mappedKey);
102 if (result != null) {
103 logDebugFoundValueForKey("Object", key, connector);
104 return result;
105 }
106 }
107 return result;
108 }
109
110 @Override
111 public String getString(final String key) {
112 final String mappedKey = mappedKey(key);
113 String result = null;
114 for (final Connector connector : this.connectors) {
115 result = connector.getString(mappedKey);
116 if (result != null) {
117 logDebugFoundValueForKey("String", key, connector);
118 return result;
119 }
120 }
121 return result;
122 }
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145 private String mappedKey(final String key) {
146 final String mappedKey = this.getMapping().get(key);
147 if (StringUtils.isEmpty(mappedKey)) {
148 return key;
149 }
150
151 return mappedKey;
152
153 }
154
155 @Override
156 public Map<String, String> getMapping() {
157 if (this.mapping == null) {
158 this.mapping = new HashMap<String, String>();
159 }
160 return this.mapping;
161 }
162
163 @Override
164 public void setMapping(final Map<String, String> mapping) {
165 this.mapping = mapping;
166 }
167
168 private void logDebugFoundValueForKey(final String type, final String key, final Connector connector) {
169 LOG.debug("Found {} for Key '{}' in connector '{}' ({})",
170 type, key, connector.getName(), connector.getClass().getName());
171 }
172 }