/**
* 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 org.apache.drill.exec.store.mapr.db.json;
import java.nio.ByteBuffer;
import java.util.Arrays;
import org.apache.drill.exec.store.mapr.db.MapRDBSubScanSpec;
import org.apache.hadoop.hbase.HConstants;
import org.ojai.DocumentConstants;
import org.ojai.Value;
import org.ojai.store.QueryCondition;
import org.ojai.store.QueryCondition.Op;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.mapr.db.MapRDB;
import com.mapr.db.impl.ConditionImpl;
import com.mapr.db.impl.IdCodec;
public class JsonSubScanSpec extends MapRDBSubScanSpec {
protected QueryCondition condition;
@JsonCreator
public JsonSubScanSpec(@JsonProperty("tableName") String tableName,
@JsonProperty("regionServer") String regionServer,
@JsonProperty("startRow") byte[] startRow,
@JsonProperty("stopRow") byte[] stopRow,
@JsonProperty("cond") QueryCondition cond) {
super(tableName, regionServer, null, null, null, null);
this.condition = MapRDB.newCondition().and();
if (cond != null) {
this.condition.condition(cond);
}
if (startRow != null &&
Arrays.equals(startRow, HConstants.EMPTY_START_ROW) == false) {
Value startVal = IdCodec.decode(startRow);
switch(startVal.getType()) {
case BINARY:
this.condition.is(DocumentConstants.ID_FIELD, Op.GREATER_OR_EQUAL, startVal.getBinary());
break;
case STRING:
this.condition.is(DocumentConstants.ID_FIELD, Op.GREATER_OR_EQUAL, startVal.getString());
break;
default:
throw new IllegalStateException("Encountered an unsupported type " + startVal.getType()
+ " for _id");
}
}
if (stopRow != null &&
Arrays.equals(stopRow, HConstants.EMPTY_END_ROW) == false) {
Value stopVal = IdCodec.decode(stopRow);
switch(stopVal.getType()) {
case BINARY:
this.condition.is(DocumentConstants.ID_FIELD, Op.LESS, stopVal.getBinary());
break;
case STRING:
this.condition.is(DocumentConstants.ID_FIELD, Op.LESS, stopVal.getString());
break;
default:
throw new IllegalStateException("Encountered an unsupported type " + stopVal.getType()
+ " for _id");
}
}
this.condition.close().build();
}
public void setCondition(QueryCondition cond) {
condition = cond;
}
@JsonIgnore
public QueryCondition getCondition() {
return this.condition;
}
@Override
public byte[] getSerializedFilter() {
if (this.condition != null) {
ByteBuffer bbuf = ((ConditionImpl)this.condition).getDescriptor().getSerialized();
byte[] serFilter = new byte[bbuf.limit() - bbuf.position()];
bbuf.get(serFilter);
return serFilter;
}
return null;
}
}