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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.dx.rop.cst;
     18 
     19 import com.android.dx.util.FixedSizeList;
     20 
     21 /**
     22  * Constant type to represent a fixed array of other constants.
     23  */
     24 public final class CstArray extends Constant {
     25     /** {@code non-null;} the actual list of contents */
     26     private final List list;
     27 
     28     /**
     29      * Constructs an instance.
     30      *
     31      * @param list {@code non-null;} the actual list of contents
     32      */
     33     public CstArray(List list) {
     34         if (list == null) {
     35             throw new NullPointerException("list == null");
     36         }
     37 
     38         list.throwIfMutable();
     39 
     40         this.list = list;
     41     }
     42 
     43     /** {@inheritDoc} */
     44     @Override
     45     public boolean equals(Object other) {
     46         if (! (other instanceof CstArray)) {
     47             return false;
     48         }
     49 
     50         return list.equals(((CstArray) other).list);
     51     }
     52 
     53     /** {@inheritDoc} */
     54     @Override
     55     public int hashCode() {
     56         return list.hashCode();
     57     }
     58 
     59     /** {@inheritDoc} */
     60     @Override
     61     protected int compareTo0(Constant other) {
     62         return list.compareTo(((CstArray) other).list);
     63     }
     64 
     65     /** {@inheritDoc} */
     66     @Override
     67     public String toString() {
     68         return list.toString("array{", ", ", "}");
     69     }
     70 
     71     /** {@inheritDoc} */
     72     @Override
     73     public String typeName() {
     74         return "array";
     75     }
     76 
     77     /** {@inheritDoc} */
     78     @Override
     79     public boolean isCategory2() {
     80         return false;
     81     }
     82 
     83     /** {@inheritDoc} */
     84     public String toHuman() {
     85         return list.toHuman("{", ", ", "}");
     86     }
     87 
     88     /**
     89      * Get the underlying list.
     90      *
     91      * @return {@code non-null;} the list
     92      */
     93     public List getList() {
     94         return list;
     95     }
     96 
     97     /**
     98      * List of {@link Constant} instances.
     99      */
    100     public static final class List
    101             extends FixedSizeList implements Comparable<List> {
    102         /**
    103          * Constructs an instance. All indices initially contain
    104          * {@code null}.
    105          *
    106          * @param size the size of the list
    107          */
    108         public List(int size) {
    109             super(size);
    110         }
    111 
    112         /** {@inheritDoc} */
    113         public int compareTo(List other) {
    114             int thisSize = size();
    115             int otherSize = other.size();
    116             int compareSize = (thisSize < otherSize) ? thisSize : otherSize;
    117 
    118             for (int i = 0; i < compareSize; i++) {
    119                 Constant thisItem = (Constant) get0(i);
    120                 Constant otherItem = (Constant) other.get0(i);
    121                 int compare = thisItem.compareTo(otherItem);
    122                 if (compare != 0) {
    123                     return compare;
    124                 }
    125             }
    126 
    127             if (thisSize < otherSize) {
    128                 return -1;
    129             } else if (thisSize > otherSize) {
    130                 return 1;
    131             }
    132 
    133             return 0;
    134         }
    135 
    136         /**
    137          * Gets the element at the given index. It is an error to call
    138          * this with the index for an element which was never set; if you
    139          * do that, this will throw {@code NullPointerException}.
    140          *
    141          * @param n {@code >= 0, < size();} which index
    142          * @return {@code non-null;} element at that index
    143          */
    144         public Constant get(int n) {
    145             return (Constant) get0(n);
    146         }
    147 
    148         /**
    149          * Sets the element at the given index.
    150          *
    151          * @param n {@code >= 0, < size();} which index
    152          * @param a {@code null-ok;} the element to set at {@code n}
    153          */
    154         public void set(int n, Constant a) {
    155             set0(n, a);
    156         }
    157     }
    158 }
    159