pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / analysis / tokenattributes / KeywordAttributeImpl.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/tokenattributes/KeywordAttributeImpl.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/tokenattributes/KeywordAttributeImpl.java
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/tokenattributes/KeywordAttributeImpl.java
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+package org.apache.lucene.analysis.tokenattributes;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import org.apache.lucene.analysis.TokenStream;
+import org.apache.lucene.util.AttributeImpl;
+
+/**
+ *This attribute can be used to mark a token as a keyword. Keyword aware
+ * {@link TokenStream}s can decide to modify a token based on the return value
+ * of {@link #isKeyword()} if the token is modified. Stemming filters for
+ * instance can use this attribute to conditionally skip a term if
+ * {@link #isKeyword()} returns <code>true</code>.
+ */
+public final class KeywordAttributeImpl extends AttributeImpl implements
+    KeywordAttribute {
+  private boolean keyword;
+
+  @Override
+  public void clear() {
+    keyword = false;
+  }
+
+  @Override
+  public void copyTo(AttributeImpl target) {
+    KeywordAttribute attr = (KeywordAttribute) target;
+    attr.setKeyword(keyword);
+  }
+
+  @Override
+  public int hashCode() {
+    return keyword ? 31 : 37;
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj)
+      return true;
+    if (getClass() != obj.getClass())
+      return false;
+    final KeywordAttributeImpl other = (KeywordAttributeImpl) obj;
+    return keyword == other.keyword;
+  }
+
+  /**
+   * Returns <code>true</code> iff the current token is a keyword, otherwise
+   * <code>false</code>/
+   * 
+   * @return <code>true</code> iff the current token is a keyword, otherwise
+   *         <code>false</code>/
+   */
+  public boolean isKeyword() {
+    return keyword;
+  }
+
+  /**
+   * Marks the current token as keyword iff set to <code>true</code>.
+   * 
+   * @param isKeyword
+   *          <code>true</code> iff the current token is a keyword, otherwise
+   *          <code>false</code>.
+   */
+  public void setKeyword(boolean isKeyword) {
+    keyword = isKeyword;
+  }
+
+}