1 /*
   2  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package com.apple.jobjc;
  26 
  27 
  28 public class Function {
  29     private static native long getFxnPtrForFunctionName(final String functionName);
  30     private static native long getFxnPtrForFunctionNameAndLib(final long libPtr, final String functionName);
  31 
  32     final long fxnPtr;
  33 
  34     Function(final long fxnPtr) {
  35         this.fxnPtr = fxnPtr;
  36     }
  37 
  38     public Function(final String name) {
  39         this(getFxnPtr(name));
  40     }
  41 
  42     public Function(final MacOSXFramework framework, final String name) {
  43         this(getFxnPtr(name, framework));
  44     }
  45 
  46     static long getFxnPtr(final String name){
  47         long fxnPtr = getFxnPtrForFunctionName(name);
  48         if(fxnPtr == 0) throw new RuntimeException("Function pointer for " + name + " not found in runtime.");
  49         return fxnPtr;
  50     }
  51 
  52     static long getFxnPtr(final String name, final MacOSXFramework framework){
  53         long fxnPtr = 0;
  54         for(int i = 0; fxnPtr == 0 && i < framework.nativeLibPtrs.length; i++){
  55             fxnPtr = getFxnPtrForFunctionNameAndLib(framework.nativeLibPtrs[i], name);
  56             if(fxnPtr != 0) return fxnPtr;
  57         }
  58         throw new RuntimeException("Function pointer for " + name + " not found in framework " + framework + ".");
  59     }
  60 }