001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.types;
019
020import static org.junit.Assert.assertEquals;
021
022import org.apache.hadoop.hbase.HBaseClassTestRule;
023import org.apache.hadoop.hbase.testclassification.MiscTests;
024import org.apache.hadoop.hbase.testclassification.SmallTests;
025import org.apache.hadoop.hbase.util.Order;
026import org.apache.hadoop.hbase.util.PositionedByteRange;
027import org.apache.hadoop.hbase.util.SimplePositionedMutableByteRange;
028import org.junit.ClassRule;
029import org.junit.Test;
030import org.junit.experimental.categories.Category;
031
032@Category({ MiscTests.class, SmallTests.class })
033public class TestUnion2 {
034  @ClassRule
035  public static final HBaseClassTestRule CLASS_RULE =
036      HBaseClassTestRule.forClass(TestUnion2.class);
037
038  /**
039   * An example <code>Union</code>
040   */
041  private static class SampleUnion1 extends Union2<Integer, String> {
042    private static final byte IS_INTEGER = 0x00;
043    private static final byte IS_STRING  = 0x01;
044
045    public SampleUnion1() {
046      super(new RawInteger(), new RawStringTerminated(Order.DESCENDING, "."));
047    }
048
049    @Override
050    public int skip(PositionedByteRange src) {
051      switch (src.get()) {
052        case IS_INTEGER:
053          return 1 + typeA.skip(src);
054        case IS_STRING:
055          return 1 + typeB.skip(src);
056        default:
057          throw new IllegalArgumentException("Unrecognized encoding format.");
058      }
059    }
060
061    @Override
062    public Object decode(PositionedByteRange src) {
063      switch (src.get()) {
064        case IS_INTEGER:
065          return typeA.decode(src);
066        case IS_STRING:
067          return typeB.decode(src);
068        default:
069          throw new IllegalArgumentException("Unrecognized encoding format.");
070      }
071    }
072
073    @Override
074    public int encodedLength(Object val) {
075      Integer i = null;
076      String s = null;
077      try {
078        i = (Integer) val;
079      } catch (ClassCastException ignored) {}
080      try {
081        s = (String) val;
082      } catch (ClassCastException ignored) {}
083
084      if (null != i) {
085        return 1 + typeA.encodedLength(i);
086      }
087
088      if (null != s) {
089        return 1 + typeB.encodedLength(s);
090      }
091
092      throw new IllegalArgumentException("val is not a valid member of this union.");
093    }
094
095    @Override
096    public int encode(PositionedByteRange dst, Object val) {
097      Integer i = null;
098      String s = null;
099      try {
100        i = (Integer) val;
101      } catch (ClassCastException ignored) {}
102      try {
103        s = (String) val;
104      } catch (ClassCastException ignored) {}
105
106      if (null != i) {
107        dst.put(IS_INTEGER);
108        return 1 + typeA.encode(dst, i);
109      } else if (null != s) {
110        dst.put(IS_STRING);
111        return 1 + typeB.encode(dst, s);
112      } else {
113        throw new IllegalArgumentException("val is not of a supported type.");
114      }
115    }
116  }
117
118  @Test
119  public void testEncodeDecode() {
120    Integer intVal = 10;
121    String strVal = "hello";
122    PositionedByteRange buff = new SimplePositionedMutableByteRange(10);
123    SampleUnion1 type = new SampleUnion1();
124
125    type.encode(buff, intVal);
126    buff.setPosition(0);
127    assertEquals(0, intVal.compareTo(type.decodeA(buff)));
128    buff.setPosition(0);
129    type.encode(buff, strVal);
130    buff.setPosition(0);
131    assertEquals(0, strVal.compareTo(type.decodeB(buff)));
132  }
133
134  @Test
135  public void testSkip() {
136    Integer intVal = 10;
137    String strVal = "hello";
138    PositionedByteRange buff = new SimplePositionedMutableByteRange(10);
139    SampleUnion1 type = new SampleUnion1();
140
141    int len = type.encode(buff, intVal);
142    buff.setPosition(0);
143    assertEquals(len, type.skip(buff));
144    buff.setPosition(0);
145    len = type.encode(buff, strVal);
146    buff.setPosition(0);
147    assertEquals(len, type.skip(buff));
148  }
149}