Source Code Cross Referenced for ColumnData.java in  » Database-Client » SQL-Workbench » workbench » storage » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » SQL Workbench » workbench.storage 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * ColumnData.java
03:         *
04:         * This file is part of SQL Workbench/J, http://www.sql-workbench.net
05:         *
06:         * Copyright 2002-2008, Thomas Kellerer
07:         * No part of this code maybe reused without the permission of the author
08:         *
09:         * To contact the author please send an email to: support@sql-workbench.net
10:         *
11:         */
12:        package workbench.storage;
13:
14:        import workbench.db.ColumnIdentifier;
15:
16:        /**
17:         * A wrapper class do hold the current value of a column
18:         * and it's definition.
19:         * 
20:         * The column definition is represented by a {@link workbench.db.ColumnIdentifier}
21:         * 
22:         * The value can be any Java object
23:         * This is used by {@link workbench.storage.DmlStatement} to store the values
24:         * when creating PreparedStatements
25:         * 
26:         * @author support@sql-workbench.net
27:         */
28:        public class ColumnData {
29:            final private Object data;
30:            final private ColumnIdentifier id;
31:
32:            /**
33:             * Creates a new instance of ColumnData
34:             * 
35:             * @param value The current value of the column
36:             * @param colid The definition of the column
37:             */
38:            public ColumnData(Object value, ColumnIdentifier colid) {
39:                data = value;
40:                id = colid;
41:            }
42:
43:            public Object getValue() {
44:                return data;
45:            }
46:
47:            public ColumnIdentifier getIdentifier() {
48:                return id;
49:            }
50:
51:            public boolean isNull() {
52:                return (data == null);
53:            }
54:
55:            @Override
56:            public boolean equals(Object obj) {
57:                if (obj == null)
58:                    return false;
59:                if (obj instanceof  ColumnData) {
60:                    final ColumnData other = (ColumnData) obj;
61:                    return this .id.equals(other.id);
62:                } else if (obj instanceof  ColumnIdentifier) {
63:                    return this .id.equals((ColumnIdentifier) obj);
64:                }
65:                return false;
66:            }
67:
68:            @Override
69:            public int hashCode() {
70:                return id.hashCode();
71:            }
72:
73:            public String toString() {
74:                return id.getColumnName() + " = "
75:                        + (data == null ? "NULL" : data.toString());
76:            }
77:
78:        }
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