MethodIdTable.java

package org.nanovm.converter;


//
//  NanoVMTool, Converter and Upload Tool for the NanoVM
//  Copyright (C) 2005 by Till Harbaum <Till@Harbaum.org>
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This program 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, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//  Parts of this tool are based on public domain code written by Kimberley
//  Burchett: http://www.kimbly.com/code/classfile/
//

//
// MethodIdTable.java
//

public class MethodIdTable {

    private final ClassLoader classLoader;

    private int[] mindex;

    public MethodIdTable(ClassLoader classLoader){
        this.classLoader = classLoader;
    }

    // build the complete method id table
    public void build() {
        mindex = new int[classLoader.totalMethods()];

        // clear index table
        for (int i = 0; i < classLoader.totalMethods(); i++) mindex[i] = -1;

        // generate table
        for (int i = 0, id = 0; i < classLoader.totalMethods(); i++) {
            // entry has not been set yet
            if (mindex[i] == -1) {
                // use same id on all methods mit same name and signature
                for (int j = i; j < classLoader.totalMethods(); j++) {
                    if (classLoader.getMethod(i).getName().equals(
                            classLoader.getMethod(j).getName()) &&
                            classLoader.getMethod(i).getSignature().equals(
                                    classLoader.getMethod(j).getSignature())) {

                        mindex[j] = id;
                    }
                }
                id++;
            }
        }
    }

    // get one entry from the method id table
    public int getEntry(int i) {
        return mindex[i];
    }

}