/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* Licensed 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 com.asakusafw.directio.hive.serde;
import org.apache.hadoop.hive.common.type.HiveChar;
import org.apache.hadoop.hive.serde2.io.HiveCharWritable;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveCharObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.CharTypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
import com.asakusafw.runtime.value.StringOption;
import com.asakusafw.runtime.value.ValueOption;
/**
* Inspects {@link StringOption} object.
* @since 0.7.0
*/
public class CharStringOptionInspector extends AbstractValueInspector implements HiveCharObjectInspector {
private final int length;
/**
* Creates a new instance.
*/
public CharStringOptionInspector() {
this((CharTypeInfo) TypeInfoFactory.charTypeInfo);
}
/**
* Creates a new instance.
* @param length character string length
*/
public CharStringOptionInspector(int length) {
this(TypeInfoFactory.getCharTypeInfo(length));
}
private CharStringOptionInspector(CharTypeInfo info) {
super(info);
this.length = info.getLength();
}
@Override
protected ValueOption<?> newObject() {
return new StringOption();
}
@Override
public HiveChar getPrimitiveJavaObject(Object o) {
StringOption object = (StringOption) o;
if (object == null || object.isNull()) {
return null;
}
return new HiveChar(object.getAsString(), length);
}
@Override
public HiveCharWritable getPrimitiveWritableObject(Object o) {
StringOption object = (StringOption) o;
if (object == null || object.isNull()) {
return null;
}
HiveCharWritable writable = new HiveCharWritable();
writable.getTextValue().set(object.get());
return writable;
}
@Override
public boolean preferWritable() {
return true;
}
}