pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / highlighter / src / java / org / apache / lucene / search / highlight / SimpleFragmenter.java

diff --git a/lucene-java-3.5.0/lucene/contrib/highlighter/src/java/org/apache/lucene/search/highlight/SimpleFragmenter.java b/lucene-java-3.5.0/lucene/contrib/highlighter/src/java/org/apache/lucene/search/highlight/SimpleFragmenter.java
new file mode 100644 (file)
index 0000000..7be917e
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+++ b/lucene-java-3.5.0/lucene/contrib/highlighter/src/java/org/apache/lucene/search/highlight/SimpleFragmenter.java
@@ -0,0 +1,80 @@
+package org.apache.lucene.search.highlight;
+
+/**
+ * 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.analysis.tokenattributes.OffsetAttribute;
+
+/**
+ * {@link Fragmenter} implementation which breaks text up into same-size
+ * fragments with no concerns over spotting sentence boundaries.
+ */
+public class SimpleFragmenter implements Fragmenter {
+  private static final int DEFAULT_FRAGMENT_SIZE = 100;
+  private int currentNumFrags;
+  private int fragmentSize;
+  private OffsetAttribute offsetAtt;
+
+  public SimpleFragmenter() {
+    this(DEFAULT_FRAGMENT_SIZE);
+  }
+
+  /**
+   * 
+   * @param fragmentSize size in number of characters of each fragment
+   */
+  public SimpleFragmenter(int fragmentSize) {
+    this.fragmentSize = fragmentSize;
+  }
+
+
+  /* (non-Javadoc)
+   * @see org.apache.lucene.search.highlight.Fragmenter#start(java.lang.String, org.apache.lucene.analysis.TokenStream)
+   */
+  public void start(String originalText, TokenStream stream) {
+    offsetAtt = stream.addAttribute(OffsetAttribute.class);
+    currentNumFrags = 1;
+  }
+
+
+  /* (non-Javadoc)
+   * @see org.apache.lucene.search.highlight.Fragmenter#isNewFragment()
+   */
+  public boolean isNewFragment() {
+    boolean isNewFrag = offsetAtt.endOffset() >= (fragmentSize * currentNumFrags);
+    if (isNewFrag) {
+      currentNumFrags++;
+    }
+    return isNewFrag;
+  }
+
+  /**
+   * @return size in number of characters of each fragment
+   */
+  public int getFragmentSize() {
+    return fragmentSize;
+  }
+
+  /**
+   * @param size size in characters of each fragment
+   */
+  public void setFragmentSize(int size) {
+    fragmentSize = size;
+  }
+
+}