org.apache.hadoop.hive.ql.io.parquet.serde.AbstractParquetMapInspector Maven / Gradle / Ivy
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/**
* 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 org.apache.hadoop.hive.ql.io.parquet.serde;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.SettableMapObjectInspector;
import org.apache.hadoop.io.ArrayWritable;
import org.apache.hadoop.io.Writable;
public abstract class AbstractParquetMapInspector implements SettableMapObjectInspector {
protected final ObjectInspector keyInspector;
protected final ObjectInspector valueInspector;
public AbstractParquetMapInspector(final ObjectInspector keyInspector, final ObjectInspector valueInspector) {
this.keyInspector = keyInspector;
this.valueInspector = valueInspector;
}
@Override
public String getTypeName() {
return "map<" + keyInspector.getTypeName() + "," + valueInspector.getTypeName() + ">";
}
@Override
public Category getCategory() {
return Category.MAP;
}
@Override
public ObjectInspector getMapKeyObjectInspector() {
return keyInspector;
}
@Override
public ObjectInspector getMapValueObjectInspector() {
return valueInspector;
}
@Override
public Map getMap(final Object data) {
if (data == null) {
return null;
}
if (data instanceof ArrayWritable) {
final Writable[] mapContainer = ((ArrayWritable) data).get();
if (mapContainer == null || mapContainer.length == 0) {
return null;
}
final Writable[] mapArray = ((ArrayWritable) mapContainer[0]).get();
final Map map = new LinkedHashMap();
for (final Writable obj : mapArray) {
final ArrayWritable mapObj = (ArrayWritable) obj;
final Writable[] arr = mapObj.get();
map.put(arr[0], arr[1]);
}
return map;
}
if (data instanceof Map) {
return (Map) data;
}
throw new UnsupportedOperationException("Cannot inspect " + data.getClass().getCanonicalName());
}
@Override
public int getMapSize(final Object data) {
if (data == null) {
return -1;
}
if (data instanceof ArrayWritable) {
final Writable[] mapContainer = ((ArrayWritable) data).get();
if (mapContainer == null || mapContainer.length == 0) {
return -1;
} else {
return ((ArrayWritable) mapContainer[0]).get().length;
}
}
if (data instanceof Map) {
return ((Map) data).size();
}
throw new UnsupportedOperationException("Cannot inspect " + data.getClass().getCanonicalName());
}
@Override
public Object create() {
Map