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Constraint.java
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Constraint.java
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/**
* Copyright Siemens AG, 2016
*
* This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
* If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package at.siemens.ct.jmz.elements.constraints;
import at.siemens.ct.jmz.elements.Element;
import at.siemens.ct.jmz.expressions.Expression;
/**
* @author Copyright Siemens AG, 2016
*/
public class Constraint implements Element {
protected final String constraintGroup;
protected final String constraintName;
protected Expression<Boolean> expression;
/**
* @see #Constraint(String, String, Expression)
* @param constraintGroup
* @param constraintName
*/
protected Constraint(String constraintGroup, String constraintName) {
this(constraintGroup, constraintName, null);
}
/**
* Creates a new constraint, assigning it a group and a name.
*
* @param constraintGroup
* Constraints that belong together should have the same group name.
* @param constraintName
* By this name, constraints are uniquely identifiable within a group.
* @param expression
* The expression enforced to be true by this constraint.
*/
public Constraint(String constraintGroup, String constraintName,
Expression<Boolean> expression) {
this.constraintGroup = constraintGroup;
this.constraintName = constraintName;
this.expression = expression;
}
/**
* Creates a new constraint without assigning it a group or a name.
*
* @see #Constraint(String, String, Expression)
*/
public Constraint(Expression<Boolean> expression) {
this(null, null, expression);
}
public String getConstraintGroup() {
return constraintGroup;
}
public String getConstraintName() {
return constraintName;
}
@Override
public String declare() {
return "constraint " + getExpressionString() + ";";
}
protected String getExpressionString() {
return expression.use();
}
public Expression<?> getExpression() {
return expression;
}
@Override
public String toString() {
return getExpressionString();
}
}