Package com.querydsl.core.types

Expression types

See: Description

Interface Summary

Interface	Description
CollectionExpression<T extends Collection<E>,E>	CollectionExpression represents Collection typed expressions
Constant<T>	Constant represents a general constant expression.
EntityPath<T>	EntityPath is the common interface for entity path expressions
Expression<T>	Expression defines a general typed expression in a Query instance.
FactoryExpression<T>	FactoryExpression represents factory expressions such as JavaBean or Constructor projections
MapExpression<K,V>	MapExpression represents Map typed expressions
Operation<T>	Operation represents an operation with operator and arguments
Operator	Operator represents operator symbols.
ParameterizedExpression<T>	ParameterizedExpression is a common interface for expressions with generic type parameters
ParamExpression<T>	ParamExpression defines named and unnamed parameters in queries
Path<T>	Path represents a path expression.
Predicate	Predicate is the common interface for Boolean typed expressions
ProjectionRole<T>	Defines a custom projection for an Expression type.
SubQueryExpression<T>	SubQueryExpression represents a sub query.
TemplateExpression<T>	TemplateExpression provides base types for custom expressions with integrated serialization templates
Visitor<R,C>	Visitor defines a visitor signature for Expression instances.

Class Summary

Class	Description
ArrayConstructorExpression<T>	ArrayConstructorExpression extends FactoryExpressionBase to represent array initializers
ConstantImpl<T>	ConstantImpl is the default implementation of the Constant interface
ConstructorExpression<T>	ConstructorExpression represents a constructor invocation
ExpressionBase<T>	ExpressionBase is the base class for immutable Expression implementations
ExpressionUtils	ExpressionUtils provides utilities for constructing common operation instances.
FactoryExpressionBase<T>	Common superclass for FactoryExpression implementations
FactoryExpressionUtils	Utility class to expand FactoryExpression constructor arguments and compress FactoryExpression invocation arguments
FactoryExpressionUtils.FactoryExpressionAdapter<T>	FactoryExpressionAdapter provides an adapter implementation of the FactoryExpression interface
HashCodeVisitor	HashCodeVisitor is used for hashCode generation in Expression implementations.
JavaTemplates	JavaTemplates extends Templates to provide Java syntax compliant serialization of Querydsl expressions
MappingProjection<T>	Projection template that allows implementing arbitrary mapping of rows to result objects.
MutableExpressionBase<T>	MutableExpressionBase is the base class for mutable Expression implementations
NullExpression<T>	NullExpression defines a general null expression
OperationImpl<T>	OperationImpl is the default implementation of the Operation interface
OrderSpecifier<T extends Comparable>	OrderSpecifier represents an order-by-element in a Query instance
ParameterizedPathImpl<T>	ParameterizedPathImpl represents Path instances with a parameterized generic type
ParamExpressionImpl<T>	ParamExpressionImpl defines a parameter in a query with an optional name
ParamsVisitor	Copies ParameterExpression bindings from subexpressions to QueryMetadata in the context
PathExtractor	Extracts the first path that occurs in an expression via breadth first search
PathImpl<T>	PathImpl defines a default implementation of the Path interface
PathMetadata	PathMetadata provides metadata for Path expressions.
PathMetadataFactory	PathMetadataFactory is a factory class for Path construction
PredicateOperation	PredicateOperation provides a Boolean typed Operation implementation
PredicateTemplate	PredicateTemplate provides a Boolean typed TemplateExpression implementation
Projections	Factory class for FactoryExpression instances
QBean<T>	QBean is a JavaBean populating projection type
QList	QList represents a projection of type List
QMap	QMap represents a projection of type Map
QTuple	QTuple represents a projection of type Tuple
SubQueryExpressionImpl<T>	SubQueryExpressionImpl is the default implementation of the SubQueryExpression interface
Template	Template provides serialization templates for Operation, TemplateExpression and Path serialization
Template.AsString	Expression as string
Template.ByIndex	Argument by index
Template.Element	General template element
Template.Operation	Math operation
Template.OperationConst	Math operation with constant
Template.StaticText	Static text element
Template.Transformed	Transformed expression
TemplateExpressionImpl<T>	Default implementation of the TemplateExpression interface
TemplateFactory	TemplateFactory is a factory for Template instances
Templates	Templates provides operator patterns for query expression serialization
Templates.Precedence	Precedence order based on Java language operator precedence
ToStringVisitor	ToStringVisitor is used for toString() serialization in Expression implementations.
ValidatingVisitor	ValidatingVisitor visits expressions and ensures that only known path instances are used

Enum Summary

Enum	Description
Ops	Ops provides the operators for the fluent query grammar.
Ops.AggOps	Aggregation operators
Ops.DateTimeOps	Date and time operators
Ops.MathOps	Math operators
Ops.QuantOps	Quantification operators
Ops.StringOps	String operators
Order	Order defines ascending and descending order
OrderSpecifier.NullHandling	Behaviour for order of null values
PathType	PathType represents the relation of a Path to its parent

Exception Summary

Exception	Description
ExpressionException	ExpressionException is thrown for Expression construction issues
ParamNotSetException	ParamNotSetException is thrown when unbound parameters are found before query execution

Package com.querydsl.core.types Description

Expression types