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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.base.reference;
     33 
     34 import com.google.common.collect.Ordering;
     35 import org.jf.dexlib2.iface.reference.MethodReference;
     36 import org.jf.util.CharSequenceUtils;
     37 import org.jf.util.CollectionUtils;
     38 
     39 import javax.annotation.Nonnull;
     40 import javax.annotation.Nullable;
     41 
     42 public abstract class BaseMethodReference implements MethodReference {
     43     @Override
     44     public int hashCode() {
     45         int hashCode = getDefiningClass().hashCode();
     46         hashCode = hashCode*31 + getName().hashCode();
     47         hashCode = hashCode*31 + getReturnType().hashCode();
     48         return hashCode*31 + getParameterTypes().hashCode();
     49     }
     50 
     51     @Override
     52     public boolean equals(@Nullable Object o) {
     53         if (o != null && o instanceof MethodReference) {
     54             MethodReference other = (MethodReference)o;
     55             return getDefiningClass().equals(other.getDefiningClass()) &&
     56                    getName().equals(other.getName()) &&
     57                    getReturnType().equals(other.getReturnType()) &&
     58                    CharSequenceUtils.listEquals(getParameterTypes(), other.getParameterTypes());
     59         }
     60         return false;
     61     }
     62 
     63     @Override
     64     public int compareTo(@Nonnull MethodReference o) {
     65         int res = getDefiningClass().compareTo(o.getDefiningClass());
     66         if (res != 0) return res;
     67         res = getName().compareTo(o.getName());
     68         if (res != 0) return res;
     69         res = getReturnType().compareTo(o.getReturnType());
     70         if (res != 0) return res;
     71         return CollectionUtils.compareAsIterable(Ordering.usingToString(), getParameterTypes(), o.getParameterTypes());
     72     }
     73 }
     74