com.datastax.oss.driver.internal.core.type.codec.FloatCodec Maven / Gradle / Ivy
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/*
* 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.PrimitiveFloatCodec;
import com.datastax.oss.driver.api.core.type.reflect.GenericType;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.nio.ByteBuffer;
import net.jcip.annotations.ThreadSafe;
@ThreadSafe
public class FloatCodec implements PrimitiveFloatCodec {
@NonNull
@Override
public GenericType getJavaType() {
return GenericType.FLOAT;
}
@NonNull
@Override
public DataType getCqlType() {
return DataTypes.FLOAT;
}
@Override
public boolean accepts(@NonNull Object value) {
return value instanceof Float;
}
@Override
public boolean accepts(@NonNull Class javaClass) {
return javaClass == Float.class || javaClass == float.class;
}
@Nullable
@Override
public ByteBuffer encodePrimitive(float value, @NonNull ProtocolVersion protocolVersion) {
ByteBuffer bytes = ByteBuffer.allocate(4);
bytes.putFloat(0, value);
return bytes;
}
@Override
public float decodePrimitive(
@Nullable ByteBuffer bytes, @NonNull ProtocolVersion protocolVersion) {
if (bytes == null || bytes.remaining() == 0) {
return 0;
} else if (bytes.remaining() != 4) {
throw new IllegalArgumentException(
"Invalid 32-bits float value, expecting 4 bytes but got " + bytes.remaining());
} else {
return bytes.getFloat(bytes.position());
}
}
@NonNull
@Override
public String format(@Nullable Float value) {
return (value == null) ? "NULL" : Float.toString(value);
}
@Nullable
@Override
public Float parse(@Nullable String value) {
try {
return (value == null || value.isEmpty() || value.equalsIgnoreCase("NULL"))
? null
: Float.parseFloat(value);
} catch (NumberFormatException e) {
throw new IllegalArgumentException(
String.format("Cannot parse 32-bits float value from \"%s\"", value));
}
}
}