net.sf.mmm.util.query.base.expression

Class ConjunctionExpression

java.lang.Object

net.sf.mmm.util.query.base.expression.ConjunctionExpression

All Implemented Interfaces:

Expression

public class ConjunctionExpression
extends Object
implements Expression

Implementation of Expression for logical Conjunction of a list of Expressions.

Since:

8.0.0

Author:

hohwille

Field Summary

Fields

Modifier and Type	Field and Description
private Conjunction	conjunction
private List<Expression>	terms

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ConjunctionExpression(Conjunction conjunction, List<Expression> terms) The constructor.

Method Summary

Modifier and Type	Method and Description
Expression	combine(Conjunction conj, Collection<Expression> expressions)
boolean	evaluate()
void	format(ExpressionFormatter formatter, Bracketing bracketing)
Conjunction	getConjunction()
List<Expression>	getTerms()
boolean	isConstant()
Expression	negate()
static Expression	valueOf(Conjunction conjunction, Collection<Expression> expressions)
static Expression	valueOf(Conjunction conjunction, Expression... expressions)
static Expression	valueOf(Expression expression, Conjunction conjunction, Collection<Expression> expressions)
private static Expression	valueOf(List<Expression> children, Conjunction conjunction, Collection<Expression> expressions)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.sf.mmm.util.query.api.expression.Expression

and, combine, or

Field Detail

conjunction

private final Conjunction conjunction

terms

private final List<Expression> terms

Constructor Detail

ConjunctionExpression

private ConjunctionExpression(Conjunction conjunction,
                              List<Expression> terms)

The constructor.

Parameters:

conjunction - - see getConjunction().

terms - the terms to combine.

Method Detail

getConjunction

public Conjunction getConjunction()

Returns:

the Conjunction.

getTerms

public List<Expression> getTerms()

Returns:

an unmodifiable List of the Expression-Terms to combine with the conjunction.

negate

public Expression negate()

Specified by:

negate in interface Expression

Returns:

the negation of this Expression.

evaluate

public boolean evaluate()

Specified by:

evaluate in interface Expression

Returns:

true if the expression is fulfilled, false otherwise.

See Also:

Predicate.test(Object)

combine

public Expression combine(Conjunction conj,
                          Collection<Expression> expressions)

Specified by:

combine in interface Expression

Parameters:

conj - the Conjunction.

expressions - the Collection of the Expressions to combine with this one.

Returns:

a new Expression combining this Expression with the given Expressions using the given Conjunction.

isConstant

public boolean isConstant()

Specified by:

isConstant in interface Expression

Returns:

true if this is a constant expression that evaluates to a fixed result, false otherwise.

valueOf

public static Expression valueOf(Conjunction conjunction,
                                 Expression... expressions)

Parameters:

conjunction - the conjunction.

expressions - the Expression terms.

Returns:

the new Expression. May be reduced and therefore does not have to be an instance of ConjunctionExpression.

valueOf

public static Expression valueOf(Conjunction conjunction,
                                 Collection<Expression> expressions)

Parameters:

conjunction - the conjunction.

expressions - the Expression terms.

Returns:

the new Expression. May be reduced and therefore does not have to be an instance of ConjunctionExpression.

valueOf

public static Expression valueOf(Expression expression,
                                 Conjunction conjunction,
                                 Collection<Expression> expressions)

Parameters:

expression - the start expression to combine with the given Expression-Collection.

conjunction - the conjunction.

expressions - the Expression terms.

Returns:

the new Expression. May be reduced and therefore does not have to be an instance of ConjunctionExpression.

valueOf

private static Expression valueOf(List<Expression> children,
                                  Conjunction conjunction,
                                  Collection<Expression> expressions)

format

public void format(ExpressionFormatter formatter,
                   Bracketing bracketing)

Specified by:

format in interface Expression

Parameters:

formatter - the ExpressionFormatter where to append this Expression.

bracketing - the Bracketing.