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Formula.java
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Formula.java
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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.mapping;
import java.io.Serializable;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.SQLFunctionRegistry;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.sql.Template;
/**
* A formula is a derived column value
* @author Gavin King
*/
public class Formula implements Selectable, Serializable {
private static int formulaUniqueInteger;
private String formula;
private int uniqueInteger;
public Formula() {
uniqueInteger = formulaUniqueInteger++;
}
public Formula(String formula) {
this();
this.formula = formula;
}
@Override
public String getTemplate(Dialect dialect, SQLFunctionRegistry functionRegistry) {
String template = Template.renderWhereStringTemplate(formula, dialect, functionRegistry);
return StringHelper.replace( template, "{alias}", Template.TEMPLATE );
}
@Override
public String getText(Dialect dialect) {
return getFormula();
}
@Override
public String getText() {
return getFormula();
}
@Override
public String getAlias(Dialect dialect) {
return "formula" + Integer.toString(uniqueInteger) + '_';
}
@Override
public String getAlias(Dialect dialect, Table table) {
return getAlias(dialect);
}
public String getFormula() {
return formula;
}
public void setFormula(String string) {
formula = string;
}
@Override
public boolean isFormula() {
return true;
}
@Override
public String toString() {
return this.getClass().getName() + "( " + formula + " )";
}
}