1/*
2 * Copyright (c) 1996, 2002, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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25
26/*
27 * (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved
28 * (C) Copyright IBM Corp. 1996 - 1998 - All Rights Reserved
29 *
30 *   The original version of this source code and documentation is copyrighted
31 * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
32 * materials are provided under terms of a License Agreement between Taligent
33 * and Sun. This technology is protected by multiple US and International
34 * patents. This notice and attribution to Taligent may not be removed.
35 *   Taligent is a registered trademark of Taligent, Inc.
36 *
37 */
38
39package java.text;
40
41
42/**
43 * <code>ParsePosition</code> is a simple class used by <code>Format</code>
44 * and its subclasses to keep track of the current position during parsing.
45 * The <code>parseObject</code> method in the various <code>Format</code>
46 * classes requires a <code>ParsePosition</code> object as an argument.
47 *
48 * <p>
49 * By design, as you parse through a string with different formats,
50 * you can use the same <code>ParsePosition</code>, since the index parameter
51 * records the current position.
52 *
53 * @author      Mark Davis
54 * @see         java.text.Format
55 */
56
57public class ParsePosition {
58
59    /**
60     * Input: the place you start parsing.
61     * <br>Output: position where the parse stopped.
62     * This is designed to be used serially,
63     * with each call setting index up for the next one.
64     */
65    int index = 0;
66    int errorIndex = -1;
67
68    /**
69     * Retrieve the current parse position.  On input to a parse method, this
70     * is the index of the character at which parsing will begin; on output, it
71     * is the index of the character following the last character parsed.
72     */
73    public int getIndex() {
74        return index;
75    }
76
77    /**
78     * Set the current parse position.
79     */
80    public void setIndex(int index) {
81        this.index = index;
82    }
83
84    /**
85     * Create a new ParsePosition with the given initial index.
86     */
87    public ParsePosition(int index) {
88        this.index = index;
89    }
90    /**
91     * Set the index at which a parse error occurred.  Formatters
92     * should set this before returning an error code from their
93     * parseObject method.  The default value is -1 if this is not set.
94     * @since 1.2
95     */
96    public void setErrorIndex(int ei)
97    {
98        errorIndex = ei;
99    }
100
101    /**
102     * Retrieve the index at which an error occurred, or -1 if the
103     * error index has not been set.
104     * @since 1.2
105     */
106    public int getErrorIndex()
107    {
108        return errorIndex;
109    }
110    /**
111     * Overrides equals
112     */
113    public boolean equals(Object obj)
114    {
115        if (obj == null) return false;
116        if (!(obj instanceof ParsePosition))
117            return false;
118        ParsePosition other = (ParsePosition) obj;
119        return (index == other.index && errorIndex == other.errorIndex);
120    }
121
122    /**
123     * Returns a hash code for this ParsePosition.
124     * @return a hash code value for this object
125     */
126    public int hashCode() {
127        return (errorIndex << 16) | index;
128    }
129
130    /**
131     * Return a string representation of this ParsePosition.
132     * @return  a string representation of this object
133     */
134    public String toString() {
135        return getClass().getName() +
136            "[index=" + index +
137            ",errorIndex=" + errorIndex + ']';
138    }
139}
140