parquet.hive.serde.primitive.ParquetStringInspector.java Source code

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Here is the source code for parquet.hive.serde.primitive.ParquetStringInspector.java

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/*
 * Copyright 2013 Criteo.
 *
 * 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 parquet.hive.serde.primitive;

import org.apache.hadoop.hive.serde2.objectinspector.primitive.AbstractPrimitiveJavaObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.SettableStringObjectInspector;
import org.apache.hadoop.io.Text;
import parquet.hive.writable.BinaryWritable;
import parquet.io.api.Binary;

/**
 * The ParquetStringInspector inspects a BinaryWritable to give a Text or String.
 *
 * @author Rmy Pecqueur <r.pecqueur@criteo.com>
 */
public class ParquetStringInspector extends AbstractPrimitiveJavaObjectInspector
        implements SettableStringObjectInspector {

    ParquetStringInspector() {
        super(PrimitiveObjectInspectorUtils.stringTypeEntry);
    }

    @Override
    public Text getPrimitiveWritableObject(final Object o) {
        if (o == null) {
            return null;
        }

        if (o instanceof BinaryWritable) {
            return new Text(((BinaryWritable) o).getBytes());
        }

        if (o instanceof Text) {
            return (Text) o;
        }

        if (o instanceof String) {
            return new Text((String) o);
        }

        throw new UnsupportedOperationException("Cannot inspect " + o.getClass().getCanonicalName());
    }

    @Override
    public String getPrimitiveJavaObject(final Object o) {
        if (o == null) {
            return null;
        }

        if (o instanceof BinaryWritable) {
            return ((BinaryWritable) o).getString();
        }

        if (o instanceof Text) {
            return ((Text) o).toString();
        }

        if (o instanceof String) {
            return (String) o;
        }

        throw new UnsupportedOperationException("Cannot inspect " + o.getClass().getCanonicalName());
    }

    @Override
    public Object set(final Object o, final Text text) {
        return new BinaryWritable(text == null ? null : Binary.fromByteArray(text.getBytes()));
    }

    @Override
    public Object set(final Object o, final String string) {
        return new BinaryWritable(string == null ? null : Binary.fromString(string));
    }

    @Override
    public Object create(final Text text) {
        if (text == null) {
            return null;
        }
        return text.toString();
    }

    @Override
    public Object create(final String string) {
        return string;
    }
}