Package org.apache.openjpa.kernel.exps

OpenJPA Expression Tree

Interface Summary

Interface	Description
AggregateListener	An aggregate listener aggregates data produced by an ExpressionQuery.
Arguments	Multiple arguments to a function call.
Constant	Interface for any query constant value.
Expression	Interface for a set of conditions that must be met for the query to be true.
ExpressionFactory	The ExpressionFactory must be implemented by a particular runtime to form Expressions in its native query language.
ExpressionParser	Parser for query languages that will be used by a ExpressionQuery.
ExpressionVisitor	Visits nodes of a query expression tree.
FilterListener	A filter listener extends expression filters with custom functionality.
Literal	Interface for any literal value.
Parameter	A query parameter.
Path	A path represents a traversal into fields of a candidate object.
Resolver	A Resolver is used to resolve listeners and class or entity names that appear in a query.
Subquery	Query value representing a subquery.
Value	Interface for any non-operator in a query filter, including constants, variables, and object fields.

Class Summary

Class	Description
AbstractExpressionBuilder	Abstract base class to help build expressions.
AbstractExpressionVisitor	No-op abstract visitor meant for easy extension.
CandidatePath	A path represents a traversal into fields of a candidate object.
CandidatePath.Traversal	Represents a traversal through a field.
Coalesce	An in-memory representation of a coalesce expression
Context	JPQL / Criteria Query Context
Exp	An in-memory representation of an Expression.
InMemoryExpressionFactory	Expression factory implementation that can be used to execute queries in memory.
NullIf	An in-memory representation of a nullif expression
QueryExpressions	Struct to hold the state of a parsed expression query.
SimpleCase	An in-memory representation of a simple case expression
StringContains	Deprecated. Use matches() instead.
Val	An in-memory representation of a Value.
WhenCondition
WhenScalar
WildcardMatch	Deprecated. Use matches() instead.