/*
* Bytecode Analysis Framework
* Copyright (C) 2003,2004 University of Maryland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.ba;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Iterator;
/**
* Abstract base class for BlockOrder variants. It allows the subclass to
* specify just a Comparator for BasicBlocks, and handles the work of doing the
* sorting and providing Iterators.
*
* @see BlockOrder
*/
public abstract class AbstractBlockOrder implements BlockOrder {
private final ArrayList<BasicBlock> blockList;
private final Comparator<BasicBlock> comparator;
public AbstractBlockOrder(CFG cfg, Comparator<BasicBlock> comparator) {
this.comparator = comparator;
// Put the blocks in an array
int numBlocks = cfg.getNumBasicBlocks(), count = 0;
BasicBlock[] blocks = new BasicBlock[numBlocks];
for (Iterator<BasicBlock> i = cfg.blockIterator(); i.hasNext();) {
blocks[count++] = i.next();
}
assert count == numBlocks;
// Sort the blocks according to the comparator
Arrays.sort(blocks, comparator);
// Put the ordered blocks into an array list
blockList = new ArrayList<BasicBlock>(numBlocks);
for (int i = 0; i < numBlocks; ++i)
blockList.add(blocks[i]);
}
public Iterator<BasicBlock> blockIterator() {
return blockList.iterator();
}
public int compare(BasicBlock b1, BasicBlock b2) {
return comparator.compare(b1, b2);
}
}
// vim:ts=4