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

java.lang.Object
  org.openrdf.query.algebra.QueryModelNodeBase
      org.openrdf.sail.rdbms.algebra.base.RdbmsQueryModelNodeBase
          org.openrdf.sail.rdbms.algebra.base.FromItem

All Implemented Interfaces:

Cloneable, QueryModelNode

Direct Known Subclasses:

JoinItem, UnionItem

public abstract class FromItem
extends RdbmsQueryModelNodeBase

An item in the SQL from clause.

Author:

James Leigh

Constructor Summary

FromItem(String alias)

Method Summary

void	addFilter(SqlExpr filter)
void	addJoin(FromItem join)
void	addJoinBefore(FromItem valueJoin, FromItem join)
List<ColumnVar>	appendVars(List<ColumnVar> vars)
FromItem	clone() Returns a (deep) clone of this query model node.
String	getAlias()
List<SqlExpr>	getFilters()
FromItem	getFromItem(String alias)
FromItem	getFromItemNotInUnion(String alias)
List<FromItem>	getJoins()
String	getSignature() Default implementation of QueryModelNode.getSignature() that prints the name of the node's class.
ColumnVar	getVar(String name)
ColumnVar	getVarForChildren(String name)
boolean	isLeft()
protected void	joinAdded(FromItem valueJoin)
void	removeFilter(SqlExpr sqlExpr)
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.
void	setLeft(boolean left)
<X extends Exception> void	visitChildren(QueryModelVisitor<X> visitor) Dummy implementation of QueryModelNode.visitChildren(org.openrdf.query.algebra.QueryModelVisitor) that does nothing.

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

visit, visit

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

getParentNode, replaceWith, setParentNode, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

FromItem

public FromItem(String alias)

Method Detail

getAlias

public String getAlias()

isLeft

public boolean isLeft()

setLeft

public void setLeft(boolean left)

getFilters

public List<SqlExpr> getFilters()

addFilter

public void addFilter(SqlExpr filter)

getJoins

public List<FromItem> getJoins()

getVarForChildren

public ColumnVar getVarForChildren(String name)

getVar

public ColumnVar getVar(String name)

addJoin

public void addJoin(FromItem join)

addJoinBefore

public void addJoinBefore(FromItem valueJoin,
                          FromItem join)

joinAdded

protected void joinAdded(FromItem valueJoin)

getFromItem

public FromItem getFromItem(String alias)

getFromItemNotInUnion

public FromItem getFromItemNotInUnion(String alias)

removeFilter

public void removeFilter(SqlExpr sqlExpr)

appendVars

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

getSignature

public String getSignature()

Description copied from class: QueryModelNodeBase

Default implementation of QueryModelNode.getSignature() that prints the name of the node's class.

Specified by:

getSignature in interface QueryModelNode

Overrides:

getSignature in class QueryModelNodeBase

Returns:

The node's signature, e.g. SLICE (offset=10, limit=10).

clone

public FromItem 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 QueryModelNodeBase

Returns:

A deep clone of this query model 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) that does nothing. Subclasses should override this method when they have child nodes.

Specified by:

visitChildren in interface QueryModelNode

Overrides:

visitChildren in class QueryModelNodeBase

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 QueryModelNodeBase

Parameters:

current - The current child node.

replacement - The new child node.