org.osgi.service.repository

Interface ExpressionCombiner

@ProviderType
public interface ExpressionCombiner

An ExpressionCombiner can be used to combine requirement expressions into a single complex requirement expression using the and, or and not operators.

Since:

1.1

"ThreadSafe"

Method Summary

Methods

Modifier and Type	Method and Description
AndExpression	and(RequirementExpression expr1, RequirementExpression expr2) Combine two RequirementExpressions into a requirement expression using the and operator.
AndExpression	and(RequirementExpression expr1, RequirementExpression expr2, RequirementExpression... moreExprs) Combine multiple RequirementExpressions into a requirement expression using the and operator.
IdentityExpression	identity(Requirement req) Wrap a Requirement in an IdentityExpression.
NotExpression	not(RequirementExpression expr) Return the negation of a RequirementExpression.
OrExpression	or(RequirementExpression expr1, RequirementExpression expr2) Combine two RequirementExpressions into a requirement expression using the or operator.
OrExpression	or(RequirementExpression expr1, RequirementExpression expr2, RequirementExpression... moreExprs) Combine multiple RequirementExpressions into a requirement expression using the or operator.

Method Detail

and

AndExpression and(RequirementExpression expr1,
                RequirementExpression expr2)

Combine two RequirementExpressions into a requirement expression using the and operator.

Parameters:

expr1 - The first requirement expression to combine into the returned requirement expression.

expr2 - The second requirement expression to combine into the returned requirement expression

Returns:

An AndExpression representing an and of the specified requirement expressions.

and

AndExpression and(RequirementExpression expr1,
                RequirementExpression expr2,
                RequirementExpression... moreExprs)

Combine multiple RequirementExpressions into a requirement expression using the and operator.

Parameters:

expr1 - The first requirement expression to combine into the returned requirement expression.

expr2 - The second requirement expression to combine into the returned requirement expression

moreExprs - Optional, additional requirement expressions to combine into the returned requirement expression.

Returns:

An AndExpression representing an and of the specified requirement expressions.

identity

IdentityExpression identity(Requirement req)

Wrap a Requirement in an IdentityExpression. This can be useful when working with a combination of Requirements and RequirementExpresions.

Parameters:

req - The requirement to wrap in a requirement expression.

Returns:

An IdentityExpression representing the specified requirement.

not

NotExpression not(RequirementExpression expr)

Return the negation of a RequirementExpression.

Parameters:

expr - The requirement expression to negate.

Returns:

A NotExpression representing the not of the specified requirement expression.

or

OrExpression or(RequirementExpression expr1,
              RequirementExpression expr2)

Combine two RequirementExpressions into a requirement expression using the or operator.

Parameters:

expr1 - The first requirement expression to combine into the returned requirement expression.

expr2 - The second requirement expression to combine into the returned requirement expression

Returns:

An OrExpression representing an or of the specified requirement expressions.

or

OrExpression or(RequirementExpression expr1,
              RequirementExpression expr2,
              RequirementExpression... moreExprs)

Combine multiple RequirementExpressions into a requirement expression using the or operator.

Parameters:

expr1 - The first requirement expression to combine into the returned requirement expression.

expr2 - The second requirement expression to combine into the returned requirement expression

moreExprs - Optional, additional requirement expressions to combine into the returned requirement expression.

Returns:

An OrExpression representing an or of the specified requirement expressions.