/* This file is part of the db4o object database http://www.db4o.com

Copyright (C) 2004 - 2011  Versant Corporation http://www.versant.com

db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program.  If not, see http://www.gnu.org/licenses/. */
package EDU.purdue.cs.bloat.cfg;

import java.util.*;

import EDU.purdue.cs.bloat.editor.*;

/**
 * <tt>Handler</tt> represents a try-catch block. It containes a set of
 * protected <tt>Block</tt>s (the "try" blocks), a catch <tt>Block</tt>,
 * and the <tt>Type</tt> of exception that is caught by the catch block.
 * 
 * @see Block
 * @see EDU.purdue.cs.bloat.reflect.Catch
 * @see EDU.purdue.cs.bloat.editor.TryCatch
 */
public class Handler {
	Set protectedBlocks;

	Block catchBlock;

	Type type;

	/**
	 * Constructor.
	 * 
	 * @param catchBlock
	 *            The block of code that handles an exception
	 * @param type
	 *            The type of exception that is thrown
	 */
	public Handler(final Block catchBlock, final Type type) {
		this.protectedBlocks = new HashSet();
		this.catchBlock = catchBlock;
		this.type = type;
	}

	/**
	 * Returns a <tt>Collection</tt> of the "try" blocks.
	 */
	public Collection protectedBlocks() {
		return protectedBlocks;
	}

	public void setCatchBlock(final Block block) {
		catchBlock = block;
	}

	public Block catchBlock() {
		return catchBlock;
	}

	public Type catchType() {
		return type;
	}

	public String toString() {
		return "try -> catch (" + type + ") " + catchBlock;
	}
}