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      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.builder.instruction;
     33 
     34 import com.google.common.collect.ImmutableList;
     35 import com.google.common.collect.Lists;
     36 import org.jf.dexlib2.Format;
     37 import org.jf.dexlib2.Opcode;
     38 import org.jf.dexlib2.builder.BuilderSwitchPayload;
     39 import org.jf.dexlib2.builder.Label;
     40 import org.jf.dexlib2.iface.instruction.formats.PackedSwitchPayload;
     41 
     42 import javax.annotation.Nonnull;
     43 import javax.annotation.Nullable;
     44 import java.util.List;
     45 
     46 public class BuilderPackedSwitchPayload extends BuilderSwitchPayload implements PackedSwitchPayload {
     47     public static final Opcode OPCODE = Opcode.PACKED_SWITCH_PAYLOAD;
     48 
     49     @Nonnull protected final List<BuilderSwitchElement> switchElements;
     50 
     51     public BuilderPackedSwitchPayload(final int startKey,
     52                                       @Nullable List<? extends Label> switchElements) {
     53         super(OPCODE);
     54         if (switchElements == null) {
     55             this.switchElements = ImmutableList.of();
     56         } else {
     57             this.switchElements = Lists.newArrayList();
     58             int key = startKey;
     59             for (Label target: switchElements) {
     60                 this.switchElements.add(new BuilderSwitchElement(this, key++, target));
     61             }
     62         }
     63     }
     64 
     65     @Nonnull @Override public List<BuilderSwitchElement> getSwitchElements() { return switchElements; }
     66 
     67     @Override public int getCodeUnits() { return 4 + switchElements.size() * 2; }
     68     @Override public Format getFormat() { return OPCODE.format; }
     69 }
     70