pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / icu / src / java / org / apache / lucene / analysis / icu / segmentation / CharArrayIterator.java

diff --git a/lucene-java-3.5.0/lucene/contrib/icu/src/java/org/apache/lucene/analysis/icu/segmentation/CharArrayIterator.java b/lucene-java-3.5.0/lucene/contrib/icu/src/java/org/apache/lucene/analysis/icu/segmentation/CharArrayIterator.java
new file mode 100644 (file)
index 0000000..be25dd0
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+++ b/lucene-java-3.5.0/lucene/contrib/icu/src/java/org/apache/lucene/analysis/icu/segmentation/CharArrayIterator.java
@@ -0,0 +1,118 @@
+package org.apache.lucene.analysis.icu.segmentation;
+
+/**
+ * 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 java.text.CharacterIterator;
+
+/**
+ * Wraps a char[] as CharacterIterator for processing with a BreakIterator
+ * @lucene.experimental
+ */
+final class CharArrayIterator implements CharacterIterator {
+  private char array[];
+  private int start;
+  private int index;
+  private int length;
+  private int limit;
+
+  public char [] getText() {
+    return array;
+  }
+  
+  public int getStart() {
+    return start;
+  }
+  
+  public int getLength() {
+    return length;
+  }
+  
+  /**
+   * Set a new region of text to be examined by this iterator
+   * 
+   * @param array text buffer to examine
+   * @param start offset into buffer
+   * @param length maximum length to examine
+   */
+  void setText(final char array[], int start, int length) {
+    this.array = array;
+    this.start = start;
+    this.index = start;
+    this.length = length;
+    this.limit = start + length;
+  }
+
+  public char current() {
+    return (index == limit) ? DONE : array[index];
+  }
+
+  public char first() {
+    index = start;
+    return current();
+  }
+
+  public int getBeginIndex() {
+    return 0;
+  }
+
+  public int getEndIndex() {
+    return length;
+  }
+
+  public int getIndex() {
+    return index - start;
+  }
+
+  public char last() {
+    index = (limit == start) ? limit : limit - 1;
+    return current();
+  }
+
+  public char next() {
+    if (++index >= limit) {
+      index = limit;
+      return DONE;
+    } else {
+      return current();
+    }
+  }
+
+  public char previous() {
+    if (--index < start) {
+      index = start;
+      return DONE;
+    } else {
+      return current();
+    }
+  }
+
+  public char setIndex(int position) {
+    if (position < getBeginIndex() || position > getEndIndex())
+      throw new IllegalArgumentException("Illegal Position: " + position);
+    index = start + position;
+    return current();
+  }
+
+  @Override
+  public Object clone() {
+    CharArrayIterator clone = new CharArrayIterator();
+    clone.setText(array, start, length);
+    clone.index = index;
+    return clone;
+  }
+}