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Lucene example source code file (TestSimpleAttributeImpls.java)

This example Lucene source code file (TestSimpleAttributeImpls.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

attributeimpl, attributeimpl, copied, exception, exception, flagsattributeimpl, flagsattributeimpl, keywordattributeimpl, offsetattributeimpl, offsetattributeimpl, payload, payloadattributeimpl, positionincrementattributeimpl, typeattributeimpl, util

The Lucene TestSimpleAttributeImpls.java source code

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.index.Payload;
import org.apache.lucene.util.AttributeImpl;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.AttributeSource.AttributeFactory;
import org.apache.lucene.util._TestUtil;

import java.util.Collections;
import java.util.HashMap;

@Deprecated
public class TestSimpleAttributeImpls extends LuceneTestCase {
  
  public void testFlagsAttribute() throws Exception {
    FlagsAttributeImpl att = new FlagsAttributeImpl();
    assertEquals(0, att.getFlags());

    att.setFlags(1234);
    assertEquals("flags=1234", att.toString());

    FlagsAttributeImpl att2 = (FlagsAttributeImpl) assertCloneIsEqual(att);
    assertEquals(1234, att2.getFlags());

    att2 = (FlagsAttributeImpl) assertCopyIsEqual(att);
    assertEquals(1234, att2.getFlags());
    
    att.clear();
    assertEquals(0, att.getFlags());
    
    _TestUtil.assertAttributeReflection(att,
      Collections.singletonMap(FlagsAttribute.class.getName() + "#flags", att.getFlags()));
  }
  
  public void testPositionIncrementAttribute() throws Exception {
    PositionIncrementAttributeImpl att = new PositionIncrementAttributeImpl();
    assertEquals(1, att.getPositionIncrement());

    att.setPositionIncrement(1234);
    assertEquals("positionIncrement=1234", att.toString());

    PositionIncrementAttributeImpl att2 = (PositionIncrementAttributeImpl) assertCloneIsEqual(att);
    assertEquals(1234, att2.getPositionIncrement());

    att2 = (PositionIncrementAttributeImpl) assertCopyIsEqual(att);
    assertEquals(1234, att2.getPositionIncrement());
    
    att.clear();
    assertEquals(1, att.getPositionIncrement());
    
    _TestUtil.assertAttributeReflection(att,
      Collections.singletonMap(PositionIncrementAttribute.class.getName() + "#positionIncrement", att.getPositionIncrement()));
  }
  
  public void testTypeAttribute() throws Exception {
    TypeAttributeImpl att = new TypeAttributeImpl();
    assertEquals(TypeAttribute.DEFAULT_TYPE, att.type());

    att.setType("hallo");
    assertEquals("type=hallo", att.toString());

    TypeAttributeImpl att2 = (TypeAttributeImpl) assertCloneIsEqual(att);
    assertEquals("hallo", att2.type());

    att2 = (TypeAttributeImpl) assertCopyIsEqual(att);
    assertEquals("hallo", att2.type());
    
    att.clear();
    assertEquals(TypeAttribute.DEFAULT_TYPE, att.type());
    
    _TestUtil.assertAttributeReflection(att,
      Collections.singletonMap(TypeAttribute.class.getName() + "#type", att.type()));
  }
  
  public void testPayloadAttribute() throws Exception {
    PayloadAttributeImpl att = new PayloadAttributeImpl();
    assertNull(att.getPayload());

    Payload pl = new Payload(new byte[]{1,2,3,4});
    att.setPayload(pl);
    
    _TestUtil.assertAttributeReflection(att,
      Collections.singletonMap(PayloadAttribute.class.getName() + "#payload", pl));

    PayloadAttributeImpl att2 = (PayloadAttributeImpl) assertCloneIsEqual(att);
    assertEquals(pl, att2.getPayload());
    assertNotSame(pl, att2.getPayload());

    att2 = (PayloadAttributeImpl) assertCopyIsEqual(att);
    assertEquals(pl, att2.getPayload());
    assertNotSame(pl, att2.getPayload());
    
    att.clear();
    assertNull(att.getPayload());
  }
  
  public void testOffsetAttribute() throws Exception {
    OffsetAttributeImpl att = new OffsetAttributeImpl();
    assertEquals(0, att.startOffset());
    assertEquals(0, att.endOffset());

    att.setOffset(12, 34);
    // no string test here, because order unknown
    
    _TestUtil.assertAttributeReflection(att,
      new HashMap<String,Object>() {{
        put(OffsetAttribute.class.getName() + "#startOffset", 12);
        put(OffsetAttribute.class.getName() + "#endOffset", 34);
      }});

    OffsetAttributeImpl att2 = (OffsetAttributeImpl) assertCloneIsEqual(att);
    assertEquals(12, att2.startOffset());
    assertEquals(34, att2.endOffset());

    att2 = (OffsetAttributeImpl) assertCopyIsEqual(att);
    assertEquals(12, att2.startOffset());
    assertEquals(34, att2.endOffset());
    
    att.clear();
    assertEquals(0, att.startOffset());
    assertEquals(0, att.endOffset());
  }
  
  public void testKeywordAttribute() {
    AttributeImpl attrImpl = AttributeFactory.DEFAULT_ATTRIBUTE_FACTORY.createAttributeInstance(KeywordAttribute.class);
    assertSame(KeywordAttributeImpl.class, attrImpl.getClass());
    KeywordAttributeImpl att = (KeywordAttributeImpl) attrImpl;
    assertFalse(att.isKeyword());
    att.setKeyword(true);
    assertTrue(att.isKeyword());
    
    KeywordAttributeImpl assertCloneIsEqual = (KeywordAttributeImpl) assertCloneIsEqual(att);
    assertTrue(assertCloneIsEqual.isKeyword());
    assertCloneIsEqual.clear();
    assertFalse(assertCloneIsEqual.isKeyword());
    assertTrue(att.isKeyword());
    
    att.copyTo(assertCloneIsEqual);
    assertTrue(assertCloneIsEqual.isKeyword());
    assertTrue(att.isKeyword());
    
    _TestUtil.assertAttributeReflection(att,
      Collections.singletonMap(KeywordAttribute.class.getName() + "#keyword", att.isKeyword()));
  }
  
  public static final AttributeImpl assertCloneIsEqual(AttributeImpl att) {
    AttributeImpl clone = (AttributeImpl) att.clone();
    assertEquals("Clone must be equal", att, clone);
    assertEquals("Clone's hashcode must be equal", att.hashCode(), clone.hashCode());
    return clone;
  }

  public static final AttributeImpl assertCopyIsEqual(AttributeImpl att) throws Exception {
    AttributeImpl copy = att.getClass().newInstance();
    att.copyTo(copy);
    assertEquals("Copied instance must be equal", att, copy);
    assertEquals("Copied instance's hashcode must be equal", att.hashCode(), copy.hashCode());
    return copy;
  }

}

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