Builder-pattern for BooleanExpressions in Query API
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Key: QI-271
URL: http://issues.ops4j.org/browse/QI-271
Project: Qi4j
Issue Type: Improvement
Components: Query
Affects Versions: 1.1
Environment: Qi4j.
Reporter: Stanislav Muhametsin
Assignee: Stanislav Muhametsin
Fix For: 1.3
Currently building boolean expressions (at least more complicated ones) is a
bit painful. Improve it by extending the builder-pattern to boolean
expressions. The interface would be something like this
{code:title=BooleanBuilder.java}
public interface BooleanBuilder
{
public BooleanBuilder and(BooleanExpression another);
public BooleanBuilder or(BooleanExpression another);
public BooleanBuilder not();
public BooleanBuilder reset(BooleanExpression newExp);
public BooleanExpression getCurrent();
}
{code}
The atomic BooleanExpressions could still be created from QueryExpressions, or
maybe introduce an own 'BooleanFactory", to say, unit of work.
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