/*
* Copyright DataStax, Inc.
*
* Licensed 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.codec.TypeCodec;
import com.datastax.oss.driver.api.core.type.reflect.GenericType;
import com.datastax.oss.driver.internal.core.util.Strings;
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 java.nio.charset.Charset;
import net.jcip.annotations.ThreadSafe;
@ThreadSafe
public class StringCodec implements TypeCodec<String> {
private final DataType cqlType;
private final Charset charset;
public StringCodec(@NonNull DataType cqlType, @NonNull Charset charset) {
this.cqlType = cqlType;
this.charset = charset;
}
@NonNull
@Override
public GenericType<String> getJavaType() {
return GenericType.STRING;
}
@NonNull
@Override
public DataType getCqlType() {
return cqlType;
}
@Override
public boolean accepts(@NonNull Object value) {
return value instanceof String;
}
@Override
public boolean accepts(@NonNull Class<?> javaClass) {
return javaClass == String.class;
}
@Nullable
@Override
public ByteBuffer encode(@Nullable String value, @NonNull ProtocolVersion protocolVersion) {
return (value == null) ? null : ByteBuffer.wrap(value.getBytes(charset));
}
@Nullable
@Override
public String decode(@Nullable ByteBuffer bytes, @NonNull ProtocolVersion protocolVersion) {
if (bytes == null) {
return null;
} else if (bytes.remaining() == 0) {
return "";
} else {
return new String(Bytes.getArray(bytes), charset);
}
}
@NonNull
@Override
public String format(@Nullable String value) {
return (value == null) ? "NULL" : Strings.quote(value);
}
@Nullable
@Override
public String parse(String value) {
if (value == null || value.isEmpty() || value.equalsIgnoreCase("NULL")) {
return null;
} else if (!Strings.isQuoted(value)) {
throw new IllegalArgumentException(
"text or varchar values must be enclosed by single quotes");
} else {
return Strings.unquote(value);
}
}
}