/*
* 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.string;
import java.util.List;
import org.apache.geode.cache.Region;
import org.apache.geode.redis.internal.ByteArrayWrapper;
import org.apache.geode.redis.internal.Command;
import org.apache.geode.redis.internal.Coder;
import org.apache.geode.redis.internal.ExecutionHandlerContext;
import org.apache.geode.redis.internal.RedisConstants.ArityDef;
public class SetBitExecutor extends StringExecutor {
private final String ERROR_NOT_INT = "The number provided must be numeric";
private final String ERROR_VALUE = "The value is out of range, must be 0 or 1";
private final String ERROR_ILLEGAL_OFFSET =
"The offset is out of range, must be greater than or equal to 0 and at most 4294967295 (512MB)";
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
Region<ByteArrayWrapper, ByteArrayWrapper> r = context.getRegionProvider().getStringsRegion();
if (commandElems.size() < 4) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.SETBIT));
return;
}
ByteArrayWrapper key = command.getKey();
checkAndSetDataType(key, context);
ByteArrayWrapper wrapper = r.get(key);
long offset;
int value;
int returnBit = 0;
try {
byte[] offAr = commandElems.get(2);
byte[] valAr = commandElems.get(3);
offset = Coder.bytesToLong(offAr);
value = Coder.bytesToInt(valAr);
} catch (NumberFormatException e) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_NOT_INT));
return;
}
if (value != 0 && value != 1) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_VALUE));
return;
}
if (offset < 0 || offset > 4294967295L) {
command
.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_ILLEGAL_OFFSET));
return;
}
int byteIndex = (int) (offset / 8);
offset %= 8;
if (wrapper == null) {
byte[] bytes = new byte[byteIndex + 1];
if (value == 1)
bytes[byteIndex] = (byte) (0x80 >> offset);
r.put(key, new ByteArrayWrapper(bytes));
command.setResponse(Coder.getIntegerResponse(context.getByteBufAllocator(), 0));
} else {
byte[] bytes = wrapper.toBytes();
if (byteIndex < bytes.length)
returnBit = (bytes[byteIndex] & (0x80 >> offset)) >> (7 - offset);
else
returnBit = 0;
if (byteIndex < bytes.length) {
bytes[byteIndex] = value == 1 ? (byte) (bytes[byteIndex] | (0x80 >> offset))
: (byte) (bytes[byteIndex] & ~(0x80 >> offset));
r.put(key, new ByteArrayWrapper(bytes));
} else {
byte[] newBytes = new byte[byteIndex + 1];
System.arraycopy(bytes, 0, newBytes, 0, bytes.length);
newBytes[byteIndex] = value == 1 ? (byte) (newBytes[byteIndex] | (0x80 >> offset))
: (byte) (newBytes[byteIndex] & ~(0x80 >> offset));
r.put(key, new ByteArrayWrapper(newBytes));
}
command.setResponse(Coder.getIntegerResponse(context.getByteBufAllocator(), returnBit));
}
}
}