com.foobar.store.ToJSONSeqConverter.java Source code

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Here is the source code for com.foobar.store.ToJSONSeqConverter.java

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/*
 * Copyright (C) IBM Corp. 2008.
 * 
 * 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.foobar.store;

import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparable;

import com.ibm.jaql.io.converter.FromJson;
import com.ibm.jaql.io.hadoop.converter.JsonToHadoopRecord;
import com.ibm.jaql.json.type.JsonUtil;
import com.ibm.jaql.json.type.JsonValue;

/**
 * 
 */
public class ToJSONSeqConverter extends JsonToHadoopRecord<WritableComparable<?>, Writable> {
    /**
     * @param i
     * @param t
     */
    private void convertItemToText(JsonValue val, Text t) {
        if (val == null || t == null)
            return;

        try {
            String s = convertItemToString(val);
            t.set(s.getBytes());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @param i
     * @return
     * @throws Exception
     */
    protected String convertItemToString(JsonValue val) throws Exception {
        return JsonUtil.printToString(val);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.ibm.jaql.io.hadoop.converter.ItemToHadoopRecord#createKeyConverter()
     */
    @Override
    protected FromJson<WritableComparable<?>> createKeyConverter() {
        return null;//new FromItemComp();
    }

    /* (non-Javadoc)
     * @see com.ibm.jaql.io.hadoop.converter.ItemToHadoopRecord#createKeyTarget()
     */
    @Override
    public WritableComparable<?> createKeyTarget() {
        return new Text();
    };

    /*
     * (non-Javadoc)
     * 
     * @see com.ibm.jaql.io.hadoop.converter.ItemToHadoopRecord#createValConverter()
     */
    @Override
    protected FromJson<Writable> createValueConverter() {
        return new FromJson<Writable>() {

            /*
             * (non-Javadoc)
             * 
             * @see com.ibm.jaql.io.converter.ToItem#convert(com.ibm.jaql.json.type.Item,
             *      java.lang.Object)
             */
            public Writable convert(JsonValue src, Writable tgt) {
                convertItemToText(src, (Text) tgt);
                return tgt;
            }

            /*
             * (non-Javadoc)
             * 
             * @see com.ibm.jaql.io.converter.ToItem#createTarget()
             */
            public Writable createTarget() {
                return new Text();
            }
        };
    }
}