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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
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     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 package org.jf.dexlib2.immutable;
     33 
     34 import com.google.common.collect.ImmutableSet;
     35 import org.jf.dexlib2.Opcodes;
     36 import org.jf.dexlib2.iface.ClassDef;
     37 import org.jf.dexlib2.iface.DexFile;
     38 import org.jf.util.ImmutableUtils;
     39 
     40 import javax.annotation.Nonnull;
     41 import javax.annotation.Nullable;
     42 import java.util.Collection;
     43 
     44 public class ImmutableDexFile implements DexFile {
     45     @Nonnull protected final ImmutableSet<? extends ImmutableClassDef> classes;
     46     @Nonnull private final Opcodes opcodes;
     47 
     48     public ImmutableDexFile(@Nonnull Opcodes opcodes, @Nullable Collection<? extends ClassDef> classes) {
     49         this.classes = ImmutableClassDef.immutableSetOf(classes);
     50         this.opcodes = opcodes;
     51     }
     52 
     53     public ImmutableDexFile(@Nonnull Opcodes opcodes, @Nullable ImmutableSet<? extends ImmutableClassDef> classes) {
     54         this.classes = ImmutableUtils.nullToEmptySet(classes);
     55         this.opcodes = opcodes;
     56     }
     57 
     58     public static ImmutableDexFile of(DexFile dexFile) {
     59         if (dexFile instanceof ImmutableDexFile) {
     60             return (ImmutableDexFile)dexFile;
     61         }
     62         return new ImmutableDexFile(dexFile.getOpcodes(), dexFile.getClasses());
     63     }
     64 
     65     @Nonnull @Override public ImmutableSet<? extends ImmutableClassDef> getClasses() { return classes; }
     66     @Nonnull @Override public Opcodes getOpcodes() { return opcodes; }
     67 }
     68