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IDirectInput.java

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 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
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package net.java.games.input;

import java.io.IOException;
import java.util.List;
import java.util.ArrayList;

/** Java wrapper for IDirectInput
 * @author martak
 * @author elias
 * @version 1.0
 */
00050 final class IDirectInput {
      private final List devices = new ArrayList();
      private final long idirectinput_address;
      private final DummyWindow window;

      public IDirectInput(DummyWindow window) throws IOException {
            this.window = window;
            this.idirectinput_address = createIDirectInput();
            try {
                  enumDevices();
            } catch (IOException e) {
                  releaseDevices();
                  release();
                  throw e;
            }
      }
      private final static native long createIDirectInput() throws IOException;

      public final List getDevices() {
            return devices;
      }

      private final void enumDevices() throws IOException {
            nEnumDevices(idirectinput_address);
      }
      private final native void nEnumDevices(long addr) throws IOException;

      /* This method is called from native code in nEnumDevices
       * native side will clean up in case of an exception
       */
      private final void addDevice(long address, byte[] instance_guid, byte[] product_guid, int dev_type, int dev_subtype, String instance_name, String product_name) throws IOException {
            try {
                  IDirectInputDevice device = new IDirectInputDevice(window, address, instance_guid, product_guid, dev_type, dev_subtype, instance_name, product_name);
                  devices.add(device);
            } catch (IOException e) {
                  DirectInputEnvironmentPlugin.logln("Failed to initialize device " + product_name + " because of: " + e);
            }
      }

      public final void releaseDevices() {
            for (int i = 0; i < devices.size(); i++) {
                  IDirectInputDevice device = (IDirectInputDevice)devices.get(i);
                  device.release();
            }
      }
      
      public final void release() {
            nRelease(idirectinput_address);
      }
      private final static native void nRelease(long address);
}

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