001: /* Copyright (c) 1995-2000, The Hypersonic SQL Group.
002: * All rights reserved.
003: *
004: * Redistribution and use in source and binary forms, with or without
005: * modification, are permitted provided that the following conditions are met:
006: *
007: * Redistributions of source code must retain the above copyright notice, this
008: * list of conditions and the following disclaimer.
009: *
010: * Redistributions in binary form must reproduce the above copyright notice,
011: * this list of conditions and the following disclaimer in the documentation
012: * and/or other materials provided with the distribution.
013: *
014: * Neither the name of the Hypersonic SQL Group nor the names of its
015: * contributors may be used to endorse or promote products derived from this
016: * software without specific prior written permission.
017: *
018: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021: * ARE DISCLAIMED. IN NO EVENT SHALL THE HYPERSONIC SQL GROUP,
022: * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
023: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
024: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
026: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029: *
030: * This software consists of voluntary contributions made by many individuals
031: * on behalf of the Hypersonic SQL Group.
032: *
033: *
034: * For work added by the HSQL Development Group:
035: *
036: * Copyright (c) 2001-2005, The HSQL Development Group
037: * All rights reserved.
038: *
039: * Redistribution and use in source and binary forms, with or without
040: * modification, are permitted provided that the following conditions are met:
041: *
042: * Redistributions of source code must retain the above copyright notice, this
043: * list of conditions and the following disclaimer.
044: *
045: * Redistributions in binary form must reproduce the above copyright notice,
046: * this list of conditions and the following disclaimer in the documentation
047: * and/or other materials provided with the distribution.
048: *
049: * Neither the name of the HSQL Development Group nor the names of its
050: * contributors may be used to endorse or promote products derived from this
051: * software without specific prior written permission.
052: *
053: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
054: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
055: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
056: * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
057: * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
058: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
059: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
060: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
061: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
062: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
063: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
064: */
065:
066: package org.hsqldb;
067:
068: import org.hsqldb.HsqlNameManager.HsqlName;
069:
070: /**
071: * This class consists of the data structure for a Constraint. This
072: * structure is shared between two Constraint Objects that together form a
073: * foreign key constraint. This simplifies structural modifications to a
074: * table. When changes to the column indexes are applied to the table's
075: * Constraint Objects, they are reflected in the Constraint Objects of any
076: * other table that shares a foreign key constraint with the modified
077: * table.
078: *
079: * New class based on Hypersonic original
080: *
081: * @author Thomas Mueller (Hypersonic SQL Group)
082: * @version 1.7.1
083: * @since 1.7.1
084: */
085: class ConstraintCore {
086:
087: // fkName and pkName are for foreign keys only
088: HsqlName fkName;
089: HsqlName pkName;
090:
091: // iLen is the number of columns involved in the constraint.
092: // it is equal to the size of iColMain but can be smaller than the
093: // size of iColRef
094: int colLen;
095:
096: // Main is the sole table in a UNIQUE constraint
097: // Or the table that is referenced by FOREIGN KEY ... REFERENCES
098: Table mainTable;
099: int[] mainColArray;
100: Index mainIndex;
101:
102: // Ref is the table that has a reference to the main table
103: Table refTable;
104: int[] refColArray;
105: Index refIndex;
106: int deleteAction;
107: int updateAction;
108:
109: //
110: Expression check;
111: TableFilter checkFilter;
112: }
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