/*
* 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.geode.redis.internal.executor.sortedset;
import java.util.List;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.query.Query;
import org.apache.geode.cache.query.SelectResults;
import org.apache.geode.redis.internal.ByteArrayWrapper;
import org.apache.geode.redis.internal.Coder;
import org.apache.geode.redis.internal.Command;
import org.apache.geode.redis.internal.DoubleWrapper;
import org.apache.geode.redis.internal.ExecutionHandlerContext;
import org.apache.geode.redis.internal.RedisDataType;
import org.apache.geode.redis.internal.RedisConstants.ArityDef;
import org.apache.geode.redis.internal.executor.SortedSetQuery;
public class ZLexCountExecutor extends SortedSetExecutor {
private final String ERROR_ILLEGAL_SYNTAX =
"The min and max strings must either start with a (, [ or be - or +";
private final int NOT_EXISTS = 0;
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
if (commandElems.size() < 4) {
command
.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.ZLEXCOUNT));
return;
}
ByteArrayWrapper key = command.getKey();
Region<ByteArrayWrapper, DoubleWrapper> keyRegion = getRegion(context, key);
checkDataType(key, RedisDataType.REDIS_SORTEDSET, context);
if (keyRegion == null) {
command.setResponse(Coder.getIntegerResponse(context.getByteBufAllocator(), NOT_EXISTS));
return;
}
boolean minInclusive = false;
boolean maxInclusive = false;
byte[] minArray = commandElems.get(2);
byte[] maxArray = commandElems.get(3);
String startString = Coder.bytesToString(minArray);
String stopString = Coder.bytesToString(maxArray);
if (minArray[0] == Coder.OPEN_BRACE_ID) {
startString = startString.substring(1);
minInclusive = false;
} else if (minArray[0] == Coder.OPEN_BRACKET_ID) {
startString = startString.substring(1);
minInclusive = true;
} else if (minArray[0] != Coder.HYPHEN_ID) {
command
.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_ILLEGAL_SYNTAX));
return;
}
if (maxArray[0] == Coder.OPEN_BRACE_ID) {
stopString = stopString.substring(1);
maxInclusive = false;
} else if (maxArray[0] == Coder.OPEN_BRACKET_ID) {
stopString = stopString.substring(1);
maxInclusive = true;
} else if (maxArray[0] != Coder.PLUS_ID) {
command
.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_ILLEGAL_SYNTAX));
return;
}
int count;
try {
count = getCount(key, keyRegion, context, Coder.stringToByteArrayWrapper(startString),
Coder.stringToByteArrayWrapper(stopString), minInclusive, maxInclusive);
} catch (Exception e) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), e.toString()));
return;
}
command.setResponse(Coder.getIntegerResponse(context.getByteBufAllocator(), count));
}
private int getCount(ByteArrayWrapper key, Region<ByteArrayWrapper, DoubleWrapper> keyRegion,
ExecutionHandlerContext context, ByteArrayWrapper start, ByteArrayWrapper stop,
boolean startInclusive, boolean stopInclusive) throws Exception {
if (start.equals("-") && stop.equals("+"))
return keyRegion.size();
else if (start.equals("+") || stop.equals("-"))
return 0;
Query query;
Object[] params;
if (start.equals("-")) {
if (stopInclusive) {
query = getQuery(key, SortedSetQuery.ZLEXCOUNTNINFI, context);
} else {
query = getQuery(key, SortedSetQuery.ZLEXCOUNTNINF, context);
}
params = new Object[] {stop};
} else if (stop.equals("+")) {
if (startInclusive) {
query = getQuery(key, SortedSetQuery.ZLEXCOUNTPINFI, context);
} else {
query = getQuery(key, SortedSetQuery.ZLEXCOUNTPINF, context);
}
params = new Object[] {start};
} else {
if (startInclusive) {
if (stopInclusive) {
query = getQuery(key, SortedSetQuery.ZLEXCOUNTSTISI, context);
} else {
query = getQuery(key, SortedSetQuery.ZLEXCOUNTSTI, context);
}
} else {
if (stopInclusive) {
query = getQuery(key, SortedSetQuery.ZLEXCOUNTSI, context);
} else {
query = getQuery(key, SortedSetQuery.ZLEXCOUNT, context);
}
}
params = new Object[] {start, stop};
}
SelectResults<?> results = (SelectResults<?>) query.execute(params);
return (Integer) results.asList().get(0);
}
}