001/*
002 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package jdk.internal.jvmci.meta;
024
025import java.util.*;
026
027public class LocalVariableTableImpl implements LocalVariableTable {
028
029    private final Local[] locals;
030
031    public LocalVariableTableImpl(Local[] locals) {
032        this.locals = locals;
033    }
034
035    @Override
036    public Local getLocal(int slot, int bci) {
037        Local result = null;
038        for (Local local : locals) {
039            if (local.getSlot() == slot && local.getStartBCI() <= bci && local.getEndBCI() >= bci) {
040                if (result == null) {
041                    result = local;
042                } else {
043                    throw new IllegalStateException("Locals overlap!");
044                }
045            }
046        }
047        return result;
048    }
049
050    @Override
051    public Local[] getLocals() {
052        return locals;
053    }
054
055    @Override
056    public Local[] getLocalsAt(int bci) {
057        List<Local> result = new ArrayList<>();
058        for (Local l : locals) {
059            if (l.getStartBCI() <= bci && bci <= l.getEndBCI()) {
060                result.add(l);
061            }
062        }
063        return result.toArray(new Local[result.size()]);
064    }
065
066}