?? constraint.java
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//$Id: Constraint.java,v 1.5.2.5 2003/12/01 05:29:15 oneovthafew Exp $package net.sf.hibernate.mapping;import java.util.ArrayList;import java.util.Iterator;import net.sf.hibernate.dialect.Dialect;import net.sf.hibernate.engine.Mapping;/** * A relational constraint. * @author Gavin King */public abstract class Constraint implements RelationalModel { private String name; private final ArrayList columns = new ArrayList(); private Table table; public String getName() { return name; } public void setName(String name) { this.name = name; } public Iterator getColumnIterator() { return columns.iterator(); } public void addColumn(Column column) { if ( !columns.contains(column) ) columns.add(column); } public void addColumns(Iterator columns) { while ( columns.hasNext() ) addColumn( (Column) columns.next() ); } public int getColumnSpan() { return columns.size(); } public Iterator columnIterator() { return columns.iterator(); } public Table getTable() { return table; } public void setTable(Table table) { this.table = table; } public String sqlDropString(Dialect dialect) { return "alter table " + getTable().getQualifiedName(dialect) + " drop constraint " + getName(); } public String sqlCreateString(Dialect dialect, Mapping p) { StringBuffer buf = new StringBuffer("alter table ") .append( getTable().getQualifiedName(dialect) ) .append( sqlConstraintString( dialect, getName() ) ); return buf.toString(); } public abstract String sqlConstraintString(Dialect d, String constraintName);}
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