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17 package org.apache.tika.metadata;
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19 import java.util.Enumeration;
20 import java.util.HashMap;
21 import java.util.Map;
22 import java.util.Properties;
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27 public class Metadata implements CreativeCommons, DublinCore, HttpHeaders,
28 MSOffice, TikaMetadataKeys, TikaMimeKeys {
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33 private Map<String, String[]> metadata = null;
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38 public Metadata() {
39 metadata = new HashMap<String, String[]>();
40 }
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49 public boolean isMultiValued(final String name) {
50 return metadata.get(name) != null && metadata.get(name).length > 1;
51 }
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58 public String[] names() {
59 return metadata.keySet().toArray(new String[metadata.keySet().size()]);
60 }
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70 public String get(final String name) {
71 String[] values = metadata.get(name);
72 if (values == null) {
73 return null;
74 } else {
75 return values[0];
76 }
77 }
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86 public String get(Property property) {
87 return get(property.getName());
88 }
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97 public String[] getValues(final String name) {
98 return _getValues(name);
99 }
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101 private String[] _getValues(final String name) {
102 String[] values = metadata.get(name);
103 if (values == null) {
104 values = new String[0];
105 }
106 return values;
107 }
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118 public void add(final String name, final String value) {
119 String[] values = metadata.get(name);
120 if (values == null) {
121 set(name, value);
122 } else {
123 String[] newValues = new String[values.length + 1];
124 System.arraycopy(values, 0, newValues, 0, values.length);
125 newValues[newValues.length - 1] = value;
126 metadata.put(name, newValues);
127 }
128 }
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136 @SuppressWarnings("unchecked")
137 public void setAll(Properties properties) {
138 Enumeration<String> names =
139 (Enumeration<String>) properties.propertyNames();
140 while (names.hasMoreElements()) {
141 String name = names.nextElement();
142 metadata.put(name, new String[] { properties.getProperty(name) });
143 }
144 }
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156 public void set(String name, String value) {
157 metadata.put(name, new String[] { value });
158 }
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167 public void set(Property property, String value) {
168 set(property.getName(), value);
169 }
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177 public void remove(String name) {
178 metadata.remove(name);
179 }
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186 public int size() {
187 return metadata.size();
188 }
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190 public boolean equals(Object o) {
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192 if (o == null) {
193 return false;
194 }
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196 Metadata other = null;
197 try {
198 other = (Metadata) o;
199 } catch (ClassCastException cce) {
200 return false;
201 }
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203 if (other.size() != size()) {
204 return false;
205 }
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207 String[] names = names();
208 for (int i = 0; i < names.length; i++) {
209 String[] otherValues = other._getValues(names[i]);
210 String[] thisValues = _getValues(names[i]);
211 if (otherValues.length != thisValues.length) {
212 return false;
213 }
214 for (int j = 0; j < otherValues.length; j++) {
215 if (!otherValues[j].equals(thisValues[j])) {
216 return false;
217 }
218 }
219 }
220 return true;
221 }
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223 public String toString() {
224 StringBuffer buf = new StringBuffer();
225 String[] names = names();
226 for (int i = 0; i < names.length; i++) {
227 String[] values = _getValues(names[i]);
228 for (int j = 0; j < values.length; j++) {
229 buf.append(names[i]).append("=").append(values[j]).append(" ");
230 }
231 }
232 return buf.toString();
233 }
234
235 }