io.r2dbc.postgresql.util.ByteBufferUtils Maven / Gradle / Ivy
/*
* Copyright 2017-2020 the original author or authors.
*
* 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
*
* https://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 io.r2dbc.postgresql.util;
import io.netty.buffer.ByteBuf;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
/**
* Utilities for working with {@link ByteBuffer}s.
*/
public final class ByteBufferUtils {
private ByteBufferUtils() {
}
/**
* Decode a {@link ByteBuffer} into a {@link String}.
*
* @param byteBuffer the {@link ByteBuffer} to decode
* @return the {@link String} decoded from the {@link ByteBuffer}
* @throws IllegalArgumentException if {@code byteBuffer} is {@code null}
*/
public static String decode(ByteBuffer byteBuffer) {
Assert.requireNonNull(byteBuffer, "byteBuffer must not be null");
return StandardCharsets.UTF_8.decode(byteBuffer).toString();
}
/**
* Encode a {@link CharSequence} into a {@link ByteBuffer}.
*
* @param s the {@link CharSequence} to encode
* @return the {@link ByteBuffer} with the {@link CharSequence} encoded within it
* @throws IllegalArgumentException if {@code s} is {@code null}
*/
public static ByteBuffer encode(CharSequence s) {
Assert.requireNonNull(s, "s must not be null");
ByteBuffer buffer = StandardCharsets.UTF_8.encode(s.toString());
buffer.position(buffer.limit());
return buffer;
}
/**
* Copy all readable bytes from {@link ByteBuf} to {@link ByteBuffer}.
*
* @param source the {@link ByteBuf} to read from.
* @return the copied {@link ByteBuffer} that is ready to be read from.
*/
public static ByteBuffer toByteBuffer(ByteBuf source) {
Assert.requireNonNull(source, "source must not be null");
ByteBuffer out = ByteBuffer.allocate(source.readableBytes());
source.readBytes(out);
out.flip();
return out;
}
}