/*
 * Copyright 2002-2019 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 org.springframework.core.io.buffer;

import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.function.IntPredicate;

import org.springframework.util.Assert;

/**
 * Provides a convenient implementation of the {@link DataBuffer} interface
 * that can be overridden to adapt the delegate.
 *
 * <p>These methods default to calling through to the wrapped delegate object.
 *
 * @author Arjen Poutsma
 * @since 5.2
 */
public class DataBufferWrapper implements DataBuffer {

        private final DataBuffer delegate;


        /**
         * Create a new {@code DataBufferWrapper} that wraps the given buffer.
         * @param delegate the buffer to wrap
         */
        public DataBufferWrapper(DataBuffer delegate) {
                Assert.notNull(delegate, "Delegate must not be null");
                this.delegate = delegate;
        }

        /**
         * Return the wrapped delegate.
         */
        public DataBuffer dataBuffer() {
                return this.delegate;
        }

        @Override
        public DataBufferFactory factory() {
                return this.delegate.factory();
        }

        @Override
        public int indexOf(IntPredicate predicate, int fromIndex) {
                return this.delegate.indexOf(predicate, fromIndex);
        }

        @Override
        public int lastIndexOf(IntPredicate predicate, int fromIndex) {
                return this.delegate.lastIndexOf(predicate, fromIndex);
        }

        @Override
        public int readableByteCount() {
                return this.delegate.readableByteCount();
        }

        @Override
        public int writableByteCount() {
                return this.delegate.writableByteCount();
        }

        @Override
        public int capacity() {
                return this.delegate.capacity();
        }

        @Override
        public DataBuffer capacity(int capacity) {
                return this.delegate.capacity(capacity);
        }

        @Override
        public DataBuffer ensureCapacity(int capacity) {
                return this.delegate.ensureCapacity(capacity);
        }

        @Override
        public int readPosition() {
                return this.delegate.readPosition();
        }

        @Override
        public DataBuffer readPosition(int readPosition) {
                return this.delegate.readPosition(readPosition);
        }

        @Override
        public int writePosition() {
                return this.delegate.writePosition();
        }

        @Override
        public DataBuffer writePosition(int writePosition) {
                return this.delegate.writePosition(writePosition);
        }

        @Override
        public byte getByte(int index) {
                return this.delegate.getByte(index);
        }

        @Override
        public byte read() {
                return this.delegate.read();
        }

        @Override
        public DataBuffer read(byte[] destination) {
                return this.delegate.read(destination);
        }

        @Override
        public DataBuffer read(byte[] destination, int offset, int length) {
                return this.delegate.read(destination, offset, length);
        }

        @Override
        public DataBuffer write(byte b) {
                return this.delegate.write(b);
        }

        @Override
        public DataBuffer write(byte[] source) {
                return this.delegate.write(source);
        }

        @Override
        public DataBuffer write(byte[] source, int offset, int length) {
                return this.delegate.write(source, offset, length);
        }

        @Override
        public DataBuffer write(DataBuffer... buffers) {
                return this.delegate.write(buffers);
        }

        @Override
        public DataBuffer write(ByteBuffer... buffers) {
                return this.delegate.write(buffers);
        }

        @Override
        public DataBuffer write(CharSequence charSequence,
                        Charset charset) {
                return this.delegate.write(charSequence, charset);
        }

        @Override
        public DataBuffer slice(int index, int length) {
                return this.delegate.slice(index, length);
        }

        @Override
        public DataBuffer retainedSlice(int index, int length) {
                return this.delegate.retainedSlice(index, length);
        }

        @Override
        public ByteBuffer asByteBuffer() {
                return this.delegate.asByteBuffer();
        }

        @Override
        public ByteBuffer asByteBuffer(int index, int length) {
                return this.delegate.asByteBuffer(index, length);
        }

        @Override
        public InputStream asInputStream() {
                return this.delegate.asInputStream();
        }

        @Override
        public InputStream asInputStream(boolean releaseOnClose) {
                return this.delegate.asInputStream(releaseOnClose);
        }

        @Override
        public OutputStream asOutputStream() {
                return this.delegate.asOutputStream();
        }

        @Override
        public String toString(Charset charset) {
                return this.delegate.toString(charset);
        }

        @Override
        public String toString(int index, int length, Charset charset) {
                return this.delegate.toString(index, length, charset);
        }

}