/*
 *  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 java.nio;

/** CharArrayBuffer, ReadWriteCharArrayBuffer and ReadOnlyCharArrayBuffer compose the implementation of array based char buffers.
 * <p>
 * ReadOnlyCharArrayBuffer extends CharArrayBuffer with all the write methods throwing read only exception.
 * </p>
 * <p>
 * This class is marked final for runtime performance.
 * </p> */
final class ReadOnlyCharArrayBuffer extends CharArrayBuffer {

	static ReadOnlyCharArrayBuffer copy (CharArrayBuffer other, int markOfOther) {
		ReadOnlyCharArrayBuffer buf = new ReadOnlyCharArrayBuffer(other.capacity(), other.backingArray, other.offset);
		buf.limit = other.limit();
		buf.position = other.position();
		buf.mark = markOfOther;
		return buf;
	}

	ReadOnlyCharArrayBuffer (int capacity, char[] backingArray, int arrayOffset) {
		super(capacity, backingArray, arrayOffset);
	}

	public CharBuffer asReadOnlyBuffer () {
		return duplicate();
	}

	public CharBuffer compact () {
		throw new ReadOnlyBufferException();
	}

	public CharBuffer duplicate () {
		return copy(this, mark);
	}

	public boolean isReadOnly () {
		return true;
	}

	protected char[] protectedArray () {
		throw new ReadOnlyBufferException();
	}

	protected int protectedArrayOffset () {
		throw new ReadOnlyBufferException();
	}

	protected boolean protectedHasArray () {
		return false;
	}

	public CharBuffer put (char c) {
		throw new ReadOnlyBufferException();
	}

	public CharBuffer put (int index, char c) {
		throw new ReadOnlyBufferException();
	}

	public final CharBuffer put (char[] src, int off, int len) {
		throw new ReadOnlyBufferException();
	}

	public final CharBuffer put (CharBuffer src) {
		throw new ReadOnlyBufferException();
	}

	public CharBuffer put (String src, int start, int end) {
		if ((start < 0) || (end < 0) || (long)start + (long)end > src.length()) {
			throw new IndexOutOfBoundsException();
		}
		throw new ReadOnlyBufferException();
	}

	public CharBuffer slice () {
		return new ReadOnlyCharArrayBuffer(remaining(), backingArray, offset + position);
	}
}