com.ebay.nest.io.sede.lazy.LazyPrimitive.java Source code

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Here is the source code for com.ebay.nest.io.sede.lazy.LazyPrimitive.java

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/**
 * 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 com.ebay.nest.io.sede.lazy;

import java.nio.charset.CharacterCodingException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;

import com.ebay.nest.io.sede.objectinspector.ObjectInspector;

/**
 * LazyPrimitive stores a primitive Object in a LazyObject.
 */
public abstract class LazyPrimitive<OI extends ObjectInspector, T extends Writable> extends LazyObject<OI> {

    private static final Log LOG = LogFactory.getLog(LazyPrimitive.class);

    protected LazyPrimitive(OI oi) {
        super(oi);
    }

    protected LazyPrimitive(LazyPrimitive<OI, T> copy) {
        super(copy.oi);
        isNull = copy.isNull;
    }

    protected T data;
    protected boolean isNull = false;

    /**
     * Returns the primitive object represented by this LazyObject. This is useful
     * because it can make sure we have "null" for null objects.
     */
    @Override
    public Object getObject() {
        return isNull ? null : this;
    }

    public T getWritableObject() {
        return isNull ? null : data;
    }

    @Override
    public String toString() {
        return isNull ? null : data.toString();
    }

    @Override
    public int hashCode() {
        return isNull ? 0 : data.hashCode();
    }

    public void logExceptionMessage(ByteArrayRef bytes, int start, int length, String dataType) {
        try {
            if (LOG.isDebugEnabled()) {
                String byteData = Text.decode(bytes.getData(), start, length);
                LOG.debug("Data not in the " + dataType + " data type range so converted to null. Given data is :"
                        + byteData, new Exception("For debugging purposes"));
            }
        } catch (CharacterCodingException e1) {
            LOG.debug("Data not in the " + dataType + " data type range so converted to null.", e1);
        }
    }

}