/*

 * Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 * Enum parameter

 *

 */

package com.nokia.trace.dictionary.model.decodeparameters;

import java.nio.ByteBuffer;

import java.util.ArrayList;

import java.util.List;

import java.util.Collections;

import java.util.Comparator;

/**

 * Enum parameter

 */

public class EnumParameter extends DecodeParameter {

	/**

	 * Size of the enum

	 */

	private int size;

	/**

	 * List of Enum members

	 */

	private ArrayList<EnumMember> members;

	/**

	 * Constructor

	 * 

	 * @param type

	 *            type

	 * @param hidden

	 *            hidden

	 * @param size

	 *            size

	 */

	public EnumParameter(String type, boolean hidden, int size) {

		super(type, hidden);

		this.size = size;

		members = new ArrayList<EnumMember>();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * com.nokia.trace.dictionary.model.decodeparameters.DecodeParameter#decode

	 * (java.nio.ByteBuffer, int, java.lang.StringBuffer, int, int,

	 * java.util.ArrayList)

	 */

	@Override

	public int decode(ByteBuffer dataFrame, int offset,

			StringBuffer traceString, int dataStart, int dataLength,

			List<String> parameterList) {

		// Check that there is enough data left in the buffer

		int bytesRemaining = dataLength - (offset - dataStart);

		if (bytesRemaining < size) {

			postDataMissingEvent(traceString, bytesRemaining, size);

		} else {

			int data = 0;

			if (size == ONE_BYTE) {

				data = DecodeUtils.getIntegerFromBuffer(dataFrame, offset,

						ONE_BYTE);

			} else if (size == TWO_BYTES) {

				data = DecodeUtils.getIntegerFromBuffer(dataFrame, offset,

						TWO_BYTES);

			} else if (size == FOUR_BYTES) {

				data = DecodeUtils.getIntegerFromBuffer(dataFrame, offset,

						FOUR_BYTES);

			}

			String memberName = getMemberName(data);

			traceString.append(memberName);

			parameterList.add(memberName);

		}

		offset = offset + size;

		return offset;

	}

	/**

	 * Adds enum member to this parameter

	 * 

	 * @param member

	 */

	public void addMember(EnumMember member) {

		int pos = Collections.binarySearch(members, member,

				new Comparator<EnumMember>() {

					public int compare(EnumMember o1, EnumMember o2) {

						int id1 = o1.getValue();

						int id2 = o2.getValue();

						return id1 > id2 ? 1 : id1 < id2 ? -1 : 0;

					}

				});

		if (pos < 0) {

			members.add(-pos - 1, member);

		}

	}

	/**

	 * Gets members name with value

	 * 

	 * @param value

	 * @return members name

	 */

	public String getMemberName(int value) {

		int pos = Collections.binarySearch(members, Integer.valueOf(value),

				new Comparator<Object>() {

					public int compare(Object o1, Object o2) {

						int id1 = ((EnumMember) o1).getValue();

						int id2 = ((Integer) o2).intValue();

						return id1 > id2 ? 1 : id1 < id2 ? -1 : 0;

					}

				});

		String name = ""; //$NON-NLS-1$

		if (pos >= 0) {

			EnumMember member = members.get(pos);

			name = member.getName();

		}

		return name;

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * com.nokia.trace.dictionary.model.decodeparameters.DecodeParameter#getSize

	 * ()

	 */

	@Override

	public int getSize() {

		return size;

	}

	/**

	 * Sets size

	 * 

	 * @param size

	 *            the size to set

	 */

	public void setSize(int size) {

		this.size = size;

	}

}