src/macosx/native/jobjc/src/core/java/com/apple/jobjc/MacOSXFramework.java

/*
 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package com.apple.jobjc;



public class MacOSXFramework {
    private static native long retainFramework(final String frameworkName);
    private static native void releaseFramework(final long frameworkPtr);
    private static native void getConstant(final long frameworkPtr, String symbol, final long bufferPtr, final int size);

    private final JObjCRuntime runtime;
    protected final long[] nativeLibPtrs;

    final long getFrameworkPtr() { return nativeLibPtrs.length > 0 ? nativeLibPtrs[0] : 0; }

    private static long[] createFrameworkPtrsFromPaths(final String[] frameworkLibPaths) {
        final long[] libPtrs = new long[frameworkLibPaths.length];
        for(int i = 0; i < libPtrs.length; i++){
            libPtrs[i] = retainFramework(frameworkLibPaths[i]);
            if(libPtrs[i] == 0) throw new RuntimeException("Could not open library at " + frameworkLibPaths[i]);
        }
        return libPtrs;
    }

    protected MacOSXFramework(final JObjCRuntime runtime, final String[] nativeLibPaths) {
        runtime.assertOK();
        this.runtime = runtime;
        this.nativeLibPtrs = createFrameworkPtrsFromPaths(nativeLibPaths);
    }

    @Override protected final synchronized void finalize() throws Throwable {
        for(long lib : nativeLibPtrs)
            if(lib != 0) releaseFramework(lib);
    }

    protected final JObjCRuntime getRuntime(){ return runtime; }

    protected void getConstant(final String symbol, final long retValPtr, final int size){
        assert size >= 0;
        assert retValPtr != 0;
        getConstant(getFrameworkPtr(), symbol, retValPtr, size);
    }

    protected void getConstant(final String symbol, final NativeArgumentBuffer out, final int size){
        getConstant(symbol, out.retValPtr, size);
    }

    protected void getConstant(final String symbol, final Struct out, final int size){
        getConstant(symbol, out.raw.bufferPtr, size);
    }
}