net.openhft.chronicle.hash.serialization.impl.StringSizedReader Maven / Gradle / Ivy
/*
* Copyright 2012-2018 Chronicle Map Contributors
*
* 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 net.openhft.chronicle.hash.serialization.impl;
import net.openhft.chronicle.bytes.Bytes;
import net.openhft.chronicle.bytes.BytesUtil;
import net.openhft.chronicle.hash.serialization.SizedReader;
import net.openhft.chronicle.hash.serialization.StatefulCopyable;
import net.openhft.chronicle.wire.WireIn;
import net.openhft.chronicle.wire.WireOut;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class StringSizedReader implements SizedReader, StatefulCopyable {
/**
* Cache field
*/
private transient StringBuilder sb;
public StringSizedReader() {
initTransients();
}
private void initTransients() {
sb = new StringBuilder();
}
@NotNull
@Override
public String read(@NotNull Bytes in, long size, @Nullable String using) {
if (0 > size || size > Integer.MAX_VALUE)
throw new IllegalStateException("positive int size expected, " + size + " given");
sb.setLength(0);
BytesUtil.parseUtf8(in, sb, (int) size);
return sb.toString();
}
@Override
public StringSizedReader copy() {
return new StringSizedReader();
}
@Override
public void readMarshallable(@NotNull WireIn wireIn) {
// no fields to read
initTransients();
}
@Override
public void writeMarshallable(@NotNull WireOut wireOut) {
// no fields to write
}
}