org.apache.olingo.server.core.uri.queryoption.apply

Class AggregateExpressionImpl

java.lang.Object

org.apache.olingo.server.core.uri.queryoption.apply.AggregateExpressionImpl

All Implemented Interfaces:

AggregateExpression, Expression, VisitableExpression

public class AggregateExpressionImpl
extends Object
implements AggregateExpression

Represents an aggregate expression.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.olingo.server.api.uri.queryoption.apply.AggregateExpression

AggregateExpression.StandardMethod

Constructor Summary

Constructors

Constructor and Description
AggregateExpressionImpl()

Method Summary

Modifier and Type	Method and Description
<T> T	accept(ExpressionVisitor<T> visitor) Method VisitableExpression.accept(ExpressionVisitor) is called when traversing the expression tree.
AggregateExpressionImpl	addFrom(AggregateExpression from)
String	getAlias() Gets the name of the aggregate if an alias name has been set.
FullQualifiedName	getCustomMethod() Gets the name of the custom aggregation method if used.
Expression	getExpression() Gets the common expression to be aggregated.
List<AggregateExpression>	getFrom() Gets the aggregate expressions for from.
AggregateExpression	getInlineAggregateExpression() Gets the inline aggregation expression to be applied to the target of the path if used.
List<UriResource>	getPath() Gets the path prefix and the path segment.
AggregateExpression.StandardMethod	getStandardMethod() Gets the standard aggregation method if used.
AggregateExpressionImpl	setAlias(String alias)
AggregateExpressionImpl	setCustomMethod(FullQualifiedName customMethod)
AggregateExpressionImpl	setExpression(Expression expression)
AggregateExpressionImpl	setInlineAggregateExpression(AggregateExpression aggregateExpression)
AggregateExpressionImpl	setPath(UriInfo uriInfo)
AggregateExpressionImpl	setStandardMethod(AggregateExpression.StandardMethod standardMethod)

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregateExpressionImpl

public AggregateExpressionImpl()

Method Detail

getPath

public List<UriResource> getPath()

Description copied from interface: AggregateExpression

Gets the path prefix and the path segment.

Specified by:

getPath in interface AggregateExpression

Returns:

a (potentially empty) list of path segments (and never null)

setPath

public AggregateExpressionImpl setPath(UriInfo uriInfo)

getExpression

public Expression getExpression()

Description copied from interface: AggregateExpression

Gets the common expression to be aggregated.

Specified by:

getExpression in interface AggregateExpression

Returns:

an Expression that could be null

setExpression

public AggregateExpressionImpl setExpression(Expression expression)

getStandardMethod

public AggregateExpression.StandardMethod getStandardMethod()

Description copied from interface: AggregateExpression

Gets the standard aggregation method if used.

Specified by:

getStandardMethod in interface AggregateExpression

Returns:

a AggregateExpression.StandardMethod or null

See Also:

AggregateExpression.getCustomMethod()

setStandardMethod

public AggregateExpressionImpl setStandardMethod(AggregateExpression.StandardMethod standardMethod)

getCustomMethod

public FullQualifiedName getCustomMethod()

Description copied from interface: AggregateExpression

Gets the name of the custom aggregation method if used.

Specified by:

getCustomMethod in interface AggregateExpression

Returns:

a FullQualifiedName or null

See Also:

AggregateExpression.getStandardMethod()

setCustomMethod

public AggregateExpressionImpl setCustomMethod(FullQualifiedName customMethod)

getInlineAggregateExpression

public AggregateExpression getInlineAggregateExpression()

Description copied from interface: AggregateExpression

Gets the inline aggregation expression to be applied to the target of the path if used.

Specified by:

getInlineAggregateExpression in interface AggregateExpression

Returns:

an aggregation expression or null

See Also:

AggregateExpression.getPath()

setInlineAggregateExpression

public AggregateExpressionImpl setInlineAggregateExpression(AggregateExpression aggregateExpression)

getFrom

public List<AggregateExpression> getFrom()

Description copied from interface: AggregateExpression

Gets the aggregate expressions for from.

Specified by:

getFrom in interface AggregateExpression

Returns:

a (potentially empty) list of aggregate expressions (but never null)

addFrom

public AggregateExpressionImpl addFrom(AggregateExpression from)

getAlias

public String getAlias()

Description copied from interface: AggregateExpression

Gets the name of the aggregate if an alias name has been set.

Specified by:

getAlias in interface AggregateExpression

Returns:

an identifier String or null

setAlias

public AggregateExpressionImpl setAlias(String alias)

accept

public <T> T accept(ExpressionVisitor<T> visitor)
             throws ExpressionVisitException,
                    ODataApplicationException

Description copied from interface: VisitableExpression

Method VisitableExpression.accept(ExpressionVisitor) is called when traversing the expression tree. This method is invoked on each expression used as node in an expression tree. The implementations should behave as follows:

Call accept on all sub nodes and store the returned Objects which are of the generic type T Call the appropriate method on the ExpressionVisitor instance and provide the stored return objects to that instance Return the object which should be passed to the processing algorithm of the parent expression node

Specified by:

accept in interface VisitableExpression

Parameters:

visitor - Visitor object (implementing ExpressionVisitor) whose methods are called during traversing a expression node of the expression tree.

Returns:

Object of type T which should be passed to the processing algorithm of the parent expression node

Throws:

ExpressionVisitException - Exception occurred in the OData library while traversing the tree

ODataApplicationException - Exception thrown by the application who implemented the visitor