UniqueKeypublic class UniqueKey extends Constraint | A relational unique key constraint |
| Methods Summary |
|---|
| public boolean | isGenerated(org.hibernate.dialect.Dialect dialect)
if ( dialect.supportsNotNullUnique() ) return true;
Iterator iter = getColumnIterator();
while ( iter.hasNext() ) {
if ( ( (Column) iter.next() ).isNullable() ) {
return false;
}
}
return true;
| | public java.lang.String | sqlConstraintString(org.hibernate.dialect.Dialect dialect)
StringBuffer buf = new StringBuffer( "unique (" );
Iterator iter = getColumnIterator();
boolean nullable = false;
while ( iter.hasNext() ) {
Column column = (Column) iter.next();
if ( !nullable && column.isNullable() ) nullable = true;
buf.append( column.getQuotedName( dialect ) );
if ( iter.hasNext() ) buf.append( ", " );
}
//do not add unique constraint on DB not supporting unique and nullable columns
return !nullable || dialect.supportsNotNullUnique() ?
buf.append( ')" ).toString() :
null;
| | public java.lang.String | sqlConstraintString(org.hibernate.dialect.Dialect dialect, java.lang.String constraintName, java.lang.String defaultCatalog, java.lang.String defaultSchema)
StringBuffer buf = new StringBuffer(
dialect.getAddPrimaryKeyConstraintString( constraintName )
).append( '(" );
Iterator iter = getColumnIterator();
boolean nullable = false;
while ( iter.hasNext() ) {
Column column = (Column) iter.next();
if ( !nullable && column.isNullable() ) nullable = true;
buf.append( column.getQuotedName( dialect ) );
if ( iter.hasNext() ) buf.append( ", " );
}
return !nullable || dialect.supportsNotNullUnique() ?
StringHelper.replace( buf.append( ')" ).toString(), "primary key", "unique" ) :
//TODO: improve this hack!
null;
| | public java.lang.String | sqlCreateString(org.hibernate.dialect.Dialect dialect, org.hibernate.engine.Mapping p, java.lang.String defaultCatalog, java.lang.String defaultSchema)
if ( dialect.supportsUniqueConstraintInCreateAlterTable() ) {
return super.sqlCreateString( dialect, p, defaultCatalog, defaultSchema );
}
else {
return Index.buildSqlCreateIndexString( dialect, getName(), getTable(), getColumnIterator(), true,
defaultCatalog, defaultSchema );
}
| | public java.lang.String | sqlDropString(org.hibernate.dialect.Dialect dialect, java.lang.String defaultCatalog, java.lang.String defaultSchema)
if ( dialect.supportsUniqueConstraintInCreateAlterTable() ) {
return super.sqlDropString( dialect, defaultCatalog, defaultSchema );
}
else {
return Index.buildSqlDropIndexString( dialect, getTable(), getName(), defaultCatalog, defaultSchema );
}
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