1 /*******************************************************************************
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
3 *
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
8 *
9 * Alternatively, the contents of this file may be used under the terms of
10 * either the GNU Lesser General Public License Version 2.1 or later (the
11 * "LGPL"), in which case the provisions of the LGPL are applicable instead
12 * of those above. If you wish to allow use of your version of this file only
13 * under the terms of the LGPL, and not to allow others to use your version of
14 * this file under the terms of the EPL, indicate your decision by deleting
15 * the provisions above and replace them with the notice and other provisions
16 * required by the LGPL. If you do not delete the provisions above, a recipient
17 * may use your version of this file under the terms of the EPL or the LGPL.
18 *
19 * Based on the original MiniSat specification from:
20 *
21 * An extensible SAT solver. Niklas Een and Niklas Sorensson. Proceedings of the
22 * Sixth International Conference on Theory and Applications of Satisfiability
23 * Testing, LNCS 2919, pp 502-518, 2003.
24 *
25 * See www.minisat.se for the original solver in C++.
26 *
27 *******************************************************************************/
28 package org.sat4j.specs;
29
30 import java.io.Serializable;
31 import java.util.Comparator;
32 import java.util.Iterator;
33
34 /**
35 * An abstraction on the type of vector used in the library.
36 *
37 * @author leberre
38 */
39 public interface IVec<T> extends Serializable {
40
41 /**
42 * @return the number of elements contained in the vector
43 */
44 int size();
45
46 /**
47 * Remove nofelems from the Vector. It is assumed that the number of
48 * elements to remove is smaller or equals to the current number of elements
49 * in the vector
50 *
51 * @param nofelems
52 * the number of elements to remove.
53 */
54 void shrink(int nofelems);
55
56 /**
57 * reduce the Vector to exactly newsize elements
58 *
59 * @param newsize
60 * the new size of the vector.
61 */
62 void shrinkTo(final int newsize);
63
64 /**
65 * Pop the last element on the stack. It is assumed that the stack is not
66 * empty!
67 */
68 void pop();
69
70 void growTo(final int newsize, final T pad);
71
72 void ensure(final int nsize);
73
74 IVec<T> push(final T elem);
75
76 /**
77 * To push an element in the vector when you know you have space for it.
78 *
79 * @param elem
80 */
81 void unsafePush(T elem);
82
83 /**
84 * Insert an element at the very begining of the vector. The former first
85 * element is appended to the end of the vector in order to have a constant
86 * time operation.
87 *
88 * @param elem
89 * the element to put first in the vector.
90 */
91 void insertFirst(final T elem);
92
93 void insertFirstWithShifting(final T elem);
94
95 void clear();
96
97 /**
98 * return the latest element on the stack. It is assumed that the stack is
99 * not empty!
100 *
101 * @return the last (top) element on the stack
102 */
103 T last();
104
105 T get(int i);
106
107 void set(int i, T o);
108
109 /**
110 * Enleve un element qui se trouve dans le vecteur!!!
111 *
112 * @param elem
113 * un element du vecteur
114 */
115 void remove(T elem);
116
117 /**
118 * Delete the ith element of the vector. The latest element of the vector
119 * replaces the removed element at the ith indexer.
120 *
121 * @param i
122 * the indexer of the element in the vector
123 * @return the former ith element of the vector that is now removed from the
124 * vector
125 */
126 T delete(int i);
127
128 /**
129 * Ces operations devraient se faire en temps constant. Ce n'est pas le
130 * cas ici.
131 *
132 * @param copy
133 */
134 void copyTo(IVec<T> copy);
135
136 <E> void copyTo(E[] dest);
137
138 /**
139 * Allow to access the internal representation of the vector as an array.
140 * Note that only the content of index 0 to size() should be taken into
141 * account. USE WITH CAUTION
142 *
143 * @return the internal representation of the Vector as an array.
144 */
145 T[] toArray();
146
147 /**
148 * Move the content of the vector into dest. Note that the vector become
149 * empty. The content of the vector is appended to dest.
150 *
151 * @param dest
152 * the vector where top put the content of this vector
153 */
154 void moveTo(IVec<T> dest);
155
156 /**
157 * Move elements inside the vector. The content of the method is equivalent
158 * to: <code>vec[dest] = vec[source]</code>
159 *
160 * @param dest
161 * the index of the destination
162 * @param source
163 * the index of the source
164 */
165 void moveTo(int dest, int source);
166
167 /*
168 * @param comparator
169 */
170 void sort(Comparator<T> comparator);
171
172 void sortUnique(Comparator<T> comparator);
173
174 /**
175 * To know if a vector is empty
176 *
177 * @return true iff the vector is empty.
178 * @since 1.6
179 */
180 boolean isEmpty();
181
182 Iterator<T> iterator();
183 }