Lucene example source code file (TestCharArrayIterator.java)

This example Lucene source code file (TestCharArrayIterator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lucene tags/keywords

chararrayiterator, chararrayiterator, exception, exception, illegalargumentexception, lucenetestcase, lucenetestcase, testchararrayiterator, testchararrayiterator, text

The Lucene TestCharArrayIterator.java source code

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;

import org.apache.lucene.util.LuceneTestCase;

public class TestCharArrayIterator extends LuceneTestCase {
  public void testBasicUsage() {
    CharArrayIterator ci = new CharArrayIterator();
    ci.setText("testing".toCharArray(), 0, "testing".length());
    assertEquals(0, ci.getBeginIndex());
    assertEquals(7, ci.getEndIndex());
    assertEquals(0, ci.getIndex());
    assertEquals('t', ci.current());
    assertEquals('e', ci.next());
    assertEquals('g', ci.last());
    assertEquals('n', ci.previous());
    assertEquals('t', ci.first());
    assertEquals(CharacterIterator.DONE, ci.previous());
  }
  
  public void testFirst() {
    CharArrayIterator ci = new CharArrayIterator();
    ci.setText("testing".toCharArray(), 0, "testing".length());
    ci.next();
    // Sets the position to getBeginIndex() and returns the character at that position. 
    assertEquals('t', ci.first());
    assertEquals(ci.getBeginIndex(), ci.getIndex());
    // or DONE if the text is empty
    ci.setText(new char[] {}, 0, 0);
    assertEquals(CharacterIterator.DONE, ci.first());
  }
  
  public void testLast() {
    CharArrayIterator ci = new CharArrayIterator();
    ci.setText("testing".toCharArray(), 0, "testing".length());
    // Sets the position to getEndIndex()-1 (getEndIndex() if the text is empty) 
    // and returns the character at that position. 
    assertEquals('g', ci.last());
    assertEquals(ci.getIndex(), ci.getEndIndex() - 1);
    // or DONE if the text is empty
    ci.setText(new char[] {}, 0, 0);
    assertEquals(CharacterIterator.DONE, ci.last());
    assertEquals(ci.getEndIndex(), ci.getIndex());
  }
  
  public void testCurrent() {
    CharArrayIterator ci = new CharArrayIterator();
    // Gets the character at the current position (as returned by getIndex()). 
    ci.setText("testing".toCharArray(), 0, "testing".length());
    assertEquals('t', ci.current());
    ci.last();
    ci.next();
    // or DONE if the current position is off the end of the text.
    assertEquals(CharacterIterator.DONE, ci.current());
  }
  
  public void testNext() {
    CharArrayIterator ci = new CharArrayIterator();
    ci.setText("te".toCharArray(), 0, 2);
    // Increments the iterator's index by one and returns the character at the new index.
    assertEquals('e', ci.next());
    assertEquals(1, ci.getIndex());
    // or DONE if the new position is off the end of the text range.
    assertEquals(CharacterIterator.DONE, ci.next());
    assertEquals(ci.getEndIndex(), ci.getIndex());
  }
  
  public void testSetIndex() {
    CharArrayIterator ci = new CharArrayIterator();
    ci.setText("test".toCharArray(), 0, "test".length());
    try {
      ci.setIndex(5);
      fail();
    } catch (Exception e) {
      assertTrue(e instanceof IllegalArgumentException);
    }
  }
  
  public void testClone() {
    char text[] = "testing".toCharArray();
    CharArrayIterator ci = new CharArrayIterator();
    ci.setText(text, 0, text.length);
    ci.next();
    CharArrayIterator ci2 = (CharArrayIterator) ci.clone();
    assertEquals(ci.getIndex(), ci2.getIndex());
    assertEquals(ci.next(), ci2.next());
    assertEquals(ci.last(), ci2.last());
  }
  

}