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      1 /*
      2  * Copyright 2013, Google Inc.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 package org.jf.dexlib2.writer.builder;
     33 
     34 import javax.annotation.Nonnull;
     35 import java.util.AbstractCollection;
     36 import java.util.Collection;
     37 import java.util.Iterator;
     38 import java.util.Map;
     39 
     40 public abstract class BuilderMapEntryCollection<Key> extends AbstractCollection<Map.Entry<Key, Integer>> {
     41     @Nonnull private final Collection<Key> keys;
     42 
     43     public BuilderMapEntryCollection(@Nonnull Collection<Key> keys) {
     44         this.keys = keys;
     45     }
     46 
     47     private class MapEntry implements Map.Entry<Key, Integer> {
     48         @Nonnull private Key key;
     49 
     50         @Nonnull @Override public Key getKey() {
     51             return key;
     52         }
     53 
     54         @Override public Integer getValue() {
     55             return BuilderMapEntryCollection.this.getValue(key);
     56         }
     57 
     58         @Override public Integer setValue(Integer value) {
     59             return BuilderMapEntryCollection.this.setValue(key, value);
     60         }
     61     }
     62 
     63     @Nonnull @Override public Iterator<Map.Entry<Key, Integer>> iterator() {
     64         final Iterator<Key> iter = keys.iterator();
     65 
     66         return new Iterator<Map.Entry<Key, Integer>>() {
     67             @Override public boolean hasNext() {
     68                 return iter.hasNext();
     69             }
     70 
     71             @Override public Map.Entry<Key, Integer> next() {
     72                 MapEntry entry = new MapEntry();
     73                 entry.key = iter.next();
     74                 return entry;
     75             }
     76 
     77             @Override public void remove() {
     78                 throw new UnsupportedOperationException();
     79             }
     80         };
     81     }
     82 
     83     @Override public int size() {
     84         return keys.size();
     85     }
     86 
     87     protected abstract int getValue(@Nonnull Key key);
     88     protected abstract int setValue(@Nonnull Key key, int value);
     89 }
     90