Home | History | Annotate | Download | only in instruction 
      1 /*
      2  * Copyright 2012, 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.immutable.instruction;
     33 
     34 import com.google.common.collect.ImmutableList;
     35 import org.jf.dexlib2.iface.instruction.SwitchElement;
     36 import org.jf.util.ImmutableConverter;
     37 
     38 import javax.annotation.Nonnull;
     39 import javax.annotation.Nullable;
     40 import java.util.List;
     41 
     42 public class ImmutableSwitchElement implements SwitchElement {
     43     protected final int key;
     44     protected final int offset;
     45 
     46     public ImmutableSwitchElement(int key,
     47                                   int offset) {
     48         this.key = key;
     49         this.offset = offset;
     50     }
     51 
     52     @Nonnull
     53     public static ImmutableSwitchElement of(SwitchElement switchElement) {
     54         if (switchElement instanceof  ImmutableSwitchElement) {
     55             return (ImmutableSwitchElement)switchElement;
     56         }
     57         return new ImmutableSwitchElement(
     58                 switchElement.getKey(),
     59                 switchElement.getOffset());
     60     }
     61 
     62     @Override public int getKey() { return key; }
     63     @Override public int getOffset() { return offset; }
     64 
     65     @Nonnull
     66     public static ImmutableList<ImmutableSwitchElement> immutableListOf(@Nullable List<? extends SwitchElement> list) {
     67         return CONVERTER.toList(list);
     68     }
     69 
     70     private static final ImmutableConverter<ImmutableSwitchElement, SwitchElement> CONVERTER =
     71             new ImmutableConverter<ImmutableSwitchElement, SwitchElement>() {
     72                 @Override
     73                 protected boolean isImmutable(@Nonnull SwitchElement item) {
     74                     return item instanceof ImmutableSwitchElement;
     75                 }
     76 
     77                 @Nonnull
     78                 @Override
     79                 protected ImmutableSwitchElement makeImmutable(@Nonnull SwitchElement item) {
     80                     return ImmutableSwitchElement.of(item);
     81                 }
     82             };
     83 }
     84