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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.rop.type.Type;
     20 import com.android.dx.util.FixedSizeList;
     21 
     22 /**
     23  * Constant type to represent a fixed array of other constants.
     24  */
     25 public final class CstArray extends Constant {
     26     /** {@code non-null;} the actual list of contents */
     27     private final List list;
     28 
     29     /**
     30      * Constructs an instance.
     31      *
     32      * @param list {@code non-null;} the actual list of contents
     33      */
     34     public CstArray(List list) {
     35         if (list == null) {
     36             throw new NullPointerException("list == null");
     37         }
     38 
     39         list.throwIfMutable();
     40 
     41         this.list = list;
     42     }
     43 
     44     /** {@inheritDoc} */
     45     @Override
     46     public boolean equals(Object other) {
     47         if (! (other instanceof CstArray)) {
     48             return false;
     49         }
     50 
     51         return list.equals(((CstArray) other).list);
     52     }
     53 
     54     /** {@inheritDoc} */
     55     @Override
     56     public int hashCode() {
     57         return list.hashCode();
     58     }
     59 
     60     /** {@inheritDoc} */
     61     @Override
     62     protected int compareTo0(Constant other) {
     63         return list.compareTo(((CstArray) other).list);
     64     }
     65 
     66     /** {@inheritDoc} */
     67     @Override
     68     public String toString() {
     69         return list.toString("array{", ", ", "}");
     70     }
     71 
     72     /** {@inheritDoc} */
     73     @Override
     74     public String typeName() {
     75         return "array";
     76     }
     77 
     78     /** {@inheritDoc} */
     79     @Override
     80     public boolean isCategory2() {
     81         return false;
     82     }
     83 
     84     /** {@inheritDoc} */
     85     public String toHuman() {
     86         return list.toHuman("{", ", ", "}");
     87     }
     88 
     89     /**
     90      * Get the underlying list.
     91      *
     92      * @return {@code non-null;} the list
     93      */
     94     public List getList() {
     95         return list;
     96     }
     97 
     98     /**
     99      * List of {@link Constant} instances.
    100      */
    101     public static final class List
    102             extends FixedSizeList implements Comparable<List> {
    103         /**
    104          * Constructs an instance. All indices initially contain
    105          * {@code null}.
    106          *
    107          * @param size the size of the list
    108          */
    109         public List(int size) {
    110             super(size);
    111         }
    112 
    113         /** {@inheritDoc} */
    114         public int compareTo(List other) {
    115             int thisSize = size();
    116             int otherSize = other.size();
    117             int compareSize = (thisSize < otherSize) ? thisSize : otherSize;
    118 
    119             for (int i = 0; i < compareSize; i++) {
    120                 Constant thisItem = (Constant) get0(i);
    121                 Constant otherItem = (Constant) other.get0(i);
    122                 int compare = thisItem.compareTo(otherItem);
    123                 if (compare != 0) {
    124                     return compare;
    125                 }
    126             }
    127 
    128             if (thisSize < otherSize) {
    129                 return -1;
    130             } else if (thisSize > otherSize) {
    131                 return 1;
    132             }
    133 
    134             return 0;
    135         }
    136 
    137         /**
    138          * Gets the element at the given index. It is an error to call
    139          * this with the index for an element which was never set; if you
    140          * do that, this will throw {@code NullPointerException}.
    141          *
    142          * @param n {@code >= 0, < size();} which index
    143          * @return {@code non-null;} element at that index
    144          */
    145         public Constant get(int n) {
    146             return (Constant) get0(n);
    147         }
    148 
    149         /**
    150          * Sets the element at the given index.
    151          *
    152          * @param n {@code >= 0, < size();} which index
    153          * @param a {@code null-ok;} the element to set at {@code n}
    154          */
    155         public void set(int n, Constant a) {
    156             set0(n, a);
    157         }
    158     }
    159 }
    160