content: /*
   * Copyright (C) 2006 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.graphics;
  
  public class RegionIterator {
  
      /**
       * Construct an iterator for all of the rectangles in a region. This
       * effectively makes a private copy of the region, so any subsequent edits
       * to region will not affect the iterator.
       *
       * @param region the region that will be iterated
       */
      public RegionIterator(Region region) {
          mNativeIter = nativeConstructor(region.ni());
      }
  
      /**
       * Return the next rectangle in the region. If there are no more rectangles
       * this returns false and r is unchanged. If there is at least one more,
       * this returns true and r is set to that rectangle.
       */
      public final boolean next(Rect r) {
          if (r == null) {
              throw new NullPointerException("The Rect must be provided");
          }
          return nativeNext(mNativeIter, r);
      }
      
      protected void finalize() throws Throwable {
          nativeDestructor(mNativeIter);
          mNativeIter = 0;  // Other finalizers can still call us.
      }
      
      private static native long nativeConstructor(long native_region);
      private static native void nativeDestructor(long native_iter);
      private static native boolean nativeNext(long native_iter, Rect r);
  
      private long mNativeIter;
  }
  
  