/**
 * 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.
 */
package org.apache.hive.hcatalog.data;

import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
import org.apache.hive.hcatalog.data.schema.HCatSchema;
import org.apache.hive.hcatalog.data.schema.HCatSchemaUtils;
import org.junit.Assert;
import org.junit.Test;

public class TestLazyHCatRecord {

  private final int INT_CONST = 789;
  private final long LONG_CONST = 5000000000L;
  private final double DOUBLE_CONST = 3.141592654;
  private final String STRING_CONST = "hello world";

  @Test
  public void testGet() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    Assert.assertEquals(INT_CONST, ((Integer) r.get(0)).intValue());
    Assert.assertEquals(LONG_CONST, ((Long) r.get(1)).longValue());
    Assert.assertEquals(DOUBLE_CONST, ((Double) r.get(2)).doubleValue(), 0);
    Assert.assertEquals(STRING_CONST, (String) r.get(3));
  }

  @Test
  public void testGetWithName() throws Exception {
    TypeInfo ti = getTypeInfo();
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector(ti));
    HCatSchema schema = HCatSchemaUtils.getHCatSchema(ti)
                        .get(0).getStructSubSchema();
    Assert.assertEquals(INT_CONST, ((Integer) r.get("an_int", schema)).intValue());
    Assert.assertEquals(LONG_CONST, ((Long) r.get("a_long", schema)).longValue());
    Assert.assertEquals(DOUBLE_CONST, ((Double) r.get("a_double", schema)).doubleValue(), 0);
    Assert.assertEquals(STRING_CONST, (String) r.get("a_string", schema));
  }

  @Test
  public void testGetAll() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    List<Object> list = r.getAll();
    Assert.assertEquals(INT_CONST, ((Integer) list.get(0)).intValue());
    Assert.assertEquals(LONG_CONST, ((Long) list.get(1)).longValue());
    Assert.assertEquals(DOUBLE_CONST, ((Double) list.get(2)).doubleValue(), 0);
    Assert.assertEquals(STRING_CONST, (String) list.get(3));
  }

  @Test
  public void testSet() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    boolean sawException = false;
    try {
      r.set(3, "Mary had a little lamb");
    } catch (UnsupportedOperationException uoe) {
      sawException = true;
    }
    Assert.assertTrue(sawException);
  }

  @Test
  public void testSize() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    Assert.assertEquals(4, r.size());
  }

  @Test
  public void testReadFields() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    boolean sawException = false;
    try {
      r.readFields(null);
    } catch (UnsupportedOperationException uoe) {
      sawException = true;
    }
    Assert.assertTrue(sawException);
  }

  @Test
  public void testWrite() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    boolean sawException = false;
    try {
      r.write(null);
    } catch (UnsupportedOperationException uoe) {
      sawException = true;
    }
    Assert.assertTrue(sawException);
  }

  @Test
  public void testSetWithName() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    boolean sawException = false;
    try {
      r.set("fred", null, "bob");
    } catch (UnsupportedOperationException uoe) {
      sawException = true;
    }
    Assert.assertTrue(sawException);
  }

  @Test
  public void testRemove() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    boolean sawException = false;
    try {
      r.remove(0);
    } catch (UnsupportedOperationException uoe) {
      sawException = true;
    }
    Assert.assertTrue(sawException);
  }

  @Test
  public void testCopy() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
    boolean sawException = false;
    try {
      r.copy(null);
    } catch (UnsupportedOperationException uoe) {
      sawException = true;
    }
    Assert.assertTrue(sawException);
  }

  @Test
  public void testGetWritable() throws Exception {
    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector()).getWritable();
    Assert.assertEquals(INT_CONST, ((Integer) r.get(0)).intValue());
    Assert.assertEquals(LONG_CONST, ((Long) r.get(1)).longValue());
    Assert.assertEquals(DOUBLE_CONST, ((Double) r.get(2)).doubleValue(), 0);
    Assert.assertEquals(STRING_CONST, (String) r.get(3));
    Assert.assertEquals("org.apache.hive.hcatalog.data.DefaultHCatRecord", r.getClass().getName());
  }

  private HCatRecord getHCatRecord() throws Exception {
    List<Object> rec_1 = new ArrayList<Object>(4);
    rec_1.add( new Integer(INT_CONST));
    rec_1.add( new Long(LONG_CONST));
    rec_1.add( new Double(DOUBLE_CONST));
    rec_1.add( new String(STRING_CONST));

    return new DefaultHCatRecord(rec_1);
  }

  private TypeInfo getTypeInfo() throws Exception {
    List<String> names = new ArrayList<String>(4);
    names.add("an_int");
    names.add("a_long");
    names.add("a_double");
    names.add("a_string");

    List<TypeInfo> tis = new ArrayList<TypeInfo>(4);
    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("int"));
    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("bigint"));
    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("double"));
    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("string"));

    return TypeInfoFactory.getStructTypeInfo(names, tis);
  }

  private ObjectInspector getObjectInspector(TypeInfo ti) throws Exception {
    return HCatRecordObjectInspectorFactory.getHCatRecordObjectInspector((StructTypeInfo)ti);
  }

  private ObjectInspector getObjectInspector() throws Exception {
    return HCatRecordObjectInspectorFactory.getHCatRecordObjectInspector(
      (StructTypeInfo)getTypeInfo());
  }
}
