com.datastax.oss.driver.internal.core.type.codec.BlobCodec Maven / Gradle / Ivy
/*
* 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 com.datastax.oss.driver.internal.core.type.codec;
import com.datastax.oss.driver.api.core.ProtocolVersion;
import com.datastax.oss.driver.api.core.type.DataType;
import com.datastax.oss.driver.api.core.type.DataTypes;
import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
import com.datastax.oss.driver.api.core.type.reflect.GenericType;
import com.datastax.oss.protocol.internal.util.Bytes;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.nio.ByteBuffer;
import net.jcip.annotations.ThreadSafe;
/**
* A codec that maps the CQL type {@code blob} to the Java type {@link ByteBuffer}.
*
* If you are looking for a codec mapping the CQL type {@code blob} to the Java type {@code
* byte[]}, you should use {@link SimpleBlobCodec} instead.
*/
@ThreadSafe
public class BlobCodec implements TypeCodec {
@NonNull
@Override
public GenericType getJavaType() {
return GenericType.BYTE_BUFFER;
}
@NonNull
@Override
public DataType getCqlType() {
return DataTypes.BLOB;
}
@Override
public boolean accepts(@NonNull Object value) {
return value instanceof ByteBuffer;
}
@Override
public boolean accepts(@NonNull Class javaClass) {
return ByteBuffer.class.equals(javaClass);
}
@Nullable
@Override
public ByteBuffer encode(@Nullable ByteBuffer value, @NonNull ProtocolVersion protocolVersion) {
return (value == null) ? null : value.duplicate();
}
@Nullable
@Override
public ByteBuffer decode(@Nullable ByteBuffer bytes, @NonNull ProtocolVersion protocolVersion) {
return (bytes == null) ? null : bytes.duplicate();
}
@NonNull
@Override
public String format(@Nullable ByteBuffer value) {
return (value == null) ? "NULL" : Bytes.toHexString(value);
}
@Nullable
@Override
public ByteBuffer parse(@Nullable String value) {
return (value == null || value.isEmpty() || value.equalsIgnoreCase("NULL"))
? null
: Bytes.fromHexString(value);
}
}