d/source/zap/MessageReader.d

// Copyright (c) 2013-2014 Sandstorm Development Group, Inc. and contributors
// Licensed under the MIT License:
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

module zap.MessageReader;

import java.nio.ByteBuffer;

import zap.AnyPointer;
import zap.ReaderArena;
import zap.ReaderOptions;
import zap.SegmentReader;

final class MessageReader
{
public: //Methods.
	this(ByteBuffer[] segmentSlices, ReaderOptions options)
	{
		this.nestingLimit = options.nestingLimit;
		this.arena = new ReaderArena(segmentSlices, options.traversalLimitInWords);
	}
	
	T.Reader getRoot(T)()
	{
		auto segment = this.arena.tryGetSegment(0);
		auto any = AnyPointer.Reader(segment, 0, this.nestingLimit);
		return any.getAs!T();
	}

package: //Variables.
	ReaderArena arena;
	int nestingLimit;
}