org.outerj.daisy.query.model
Class IsLinked

java.lang.Object
  org.outerj.daisy.query.model.AbstractPredicateExpr
      org.outerj.daisy.query.model.IsLinked

All Implemented Interfaces:

Expression, PredicateExpr

public class IsLinked
extends AbstractPredicateExpr

Constructor Summary

IsLinked(boolean linked)

Method Summary

Tristate	appliesTo(org.outerj.daisy.repository.Document document) Checks if this conditionl expression could evaluate to true for a document, without really knowing everything about the document.
int	bindSql(java.sql.PreparedStatement stmt, int bindPos, org.outerj.daisy.repository.query.EvaluationContext evaluationContext)
boolean	evaluate(org.outerj.daisy.repository.Document document, org.outerj.daisy.repository.Version version, org.outerj.daisy.repository.query.EvaluationContext evaluationContext) Evaluates the expression for the given document and version.
void	generateSql(java.lang.StringBuffer sql, SqlGenerationContext context)
AclConditionViolation	isAclAllowed() Checks if this PredicateExpr only uses stuff allowed in ACL object conditions.
void	prepare(QueryContext context) Needs to be called before usage of other methods.

Methods inherited from class org.outerj.daisy.query.model.AbstractPredicateExpr

getColumn, getLine, getLocation, setLocation

Methods inherited from class java.lang.Object

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

Constructor Detail

IsLinked

public IsLinked(boolean linked)

Method Detail

prepare

public void prepare(QueryContext context)
             throws org.outerj.daisy.repository.query.QueryException

Description copied from interface: PredicateExpr

Needs to be called before usage of other methods.

Throws:

org.outerj.daisy.repository.query.QueryException

evaluate

public boolean evaluate(org.outerj.daisy.repository.Document document,
                        org.outerj.daisy.repository.Version version,
                        org.outerj.daisy.repository.query.EvaluationContext evaluationContext)
                 throws org.outerj.daisy.repository.query.QueryException

Description copied from interface: PredicateExpr

Evaluates the expression for the given document and version. The version parameter is allowed to be null, in which case version-dependent information will be retrieved from the document object.

Throws:

org.outerj.daisy.repository.query.QueryException

generateSql

public void generateSql(java.lang.StringBuffer sql,
                        SqlGenerationContext context)
                 throws org.outerj.daisy.repository.query.QueryException

Throws:

org.outerj.daisy.repository.query.QueryException

bindSql

public int bindSql(java.sql.PreparedStatement stmt,
                   int bindPos,
                   org.outerj.daisy.repository.query.EvaluationContext evaluationContext)
            throws java.sql.SQLException

bindPos - the binding position on which to bind the next value

Returns:

the next binding position

Throws:

java.sql.SQLException

isAclAllowed

public AclConditionViolation isAclAllowed()

Description copied from interface: PredicateExpr

Checks if this PredicateExpr only uses stuff allowed in ACL object conditions. Returns null if successfull.

appliesTo

public Tristate appliesTo(org.outerj.daisy.repository.Document document)

Description copied from interface: PredicateExpr

Checks if this conditionl expression could evaluate to true for a document, without really knowing everything about the document. The supplied Document object only needs to return the document type and collections, the other methods do not need to be implemented.

The result can be:

• yes, if the expression is guaranteed to evaluate to true for such a document. For example, the simple expression 'true' will always be true regardless of the document.
• no,if the expression is guaranteed to evaluate to false for such a document. For example, the expression test "documentType = 'abc'" but the supplied document object is of another type.
• maybe, if the epxression could apply but the exact outcome depends on further information. For example, when the expression depends on the value of a field.