org.openrdf.sail.rdbms.algebra

Class UnionItem

java.lang.Object

org.openrdf.query.algebra.QueryModelNodeBase

org.openrdf.sail.rdbms.algebra.base.RdbmsQueryModelNodeBase

org.openrdf.sail.rdbms.algebra.base.FromItem

org.openrdf.sail.rdbms.algebra.UnionItem

All Implemented Interfaces:

Serializable, Cloneable, QueryModelNode

public class UnionItem
extends FromItem

An SQL UNION expression between two FromItems.

Author:

James Leigh

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
UnionItem(String alias)

Method Summary

Modifier and Type	Method and Description
void	addUnion(FromItem from)
List<ColumnVar>	appendVars(List<ColumnVar> columns)
UnionItem	clone() Returns a (deep) clone of this query model node.
FromItem	getFromItem(String alias)
List<ColumnVar>	getSelectColumns()
List<String>	getSelectVarNames()
List<FromItem>	getUnion()
ColumnVar	getVar(String name)
ColumnVar	getVarForChildren(String name)
void	replaceChildNode(QueryModelNode current, QueryModelNode replacement) Default implementation of QueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this node.
<X extends Exception> void	visit(RdbmsQueryModelVisitorBase<X> visitor)
<X extends Exception> void	visitChildren(QueryModelVisitor<X> visitor) Dummy implementation of QueryModelNode.visitChildren(org.openrdf.query.algebra.QueryModelVisitor<X>) that does nothing.

Methods inherited from class org.openrdf.sail.rdbms.algebra.base.FromItem

addFilter, addJoin, addJoinBefore, getAlias, getFilters, getFromItemNotInUnion, getJoins, getSignature, isLeft, joinAdded, removeFilter, setLeft

Methods inherited from class org.openrdf.sail.rdbms.algebra.base.RdbmsQueryModelNodeBase

visit

Methods inherited from class org.openrdf.query.algebra.QueryModelNodeBase

getParentNode, nullEquals, replaceNodeInList, replaceWith, setParentNode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.query.algebra.QueryModelNode

equals

Constructor Detail

UnionItem

public UnionItem(String alias)

Method Detail

getFromItem

public FromItem getFromItem(String alias)

Overrides:

getFromItem in class FromItem

getSelectVarNames

public List<String> getSelectVarNames()

getSelectColumns

public List<ColumnVar> getSelectColumns()

appendVars

public List<ColumnVar> appendVars(List<ColumnVar> columns)

Overrides:

appendVars in class FromItem

getVar

public ColumnVar getVar(String name)

Overrides:

getVar in class FromItem

getVarForChildren

public ColumnVar getVarForChildren(String name)

Overrides:

getVarForChildren in class FromItem

addUnion

public void addUnion(FromItem from)

getUnion

public List<FromItem> getUnion()

clone

public UnionItem clone()

Description copied from interface: QueryModelNode

Returns a (deep) clone of this query model node. This method recursively clones the entire node tree, starting from this nodes.

Specified by:

clone in interface QueryModelNode

Overrides:

clone in class FromItem

Returns:

A deep clone of this query model node.

visit

public <X extends Exception> void visit(RdbmsQueryModelVisitorBase<X> visitor)
                                 throws X extends Exception

Specified by:

visit in class RdbmsQueryModelNodeBase

Throws:

X extends Exception

replaceChildNode

public void replaceChildNode(QueryModelNode current,
                             QueryModelNode replacement)

Description copied from class: QueryModelNodeBase

Default implementation of QueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this node.

Specified by:

replaceChildNode in interface QueryModelNode

Overrides:

replaceChildNode in class FromItem

Parameters:

current - The current child node.

replacement - The new child node.

visitChildren

public <X extends Exception> void visitChildren(QueryModelVisitor<X> visitor)
                                         throws X extends Exception

Description copied from class: QueryModelNodeBase

Dummy implementation of QueryModelNode.visitChildren(org.openrdf.query.algebra.QueryModelVisitor<X>) that does nothing. Subclasses should override this method when they have child nodes.

Specified by:

visitChildren in interface QueryModelNode

Overrides:

visitChildren in class FromItem

Throws:

X extends Exception