com.metamatrix.query.mapping.relational
Class QueryNode

java.lang.Object
  com.metamatrix.query.mapping.relational.QueryNode

All Implemented Interfaces:

java.io.Serializable

public class QueryNode
extends java.lang.Object
implements java.io.Serializable

The QueryNode represents a virtual or temporary group in the modeler. QueryNodes may be nested to indicate data queries built from other virtual or temporary groups. The root node of a tree of QueryNode objects should be defining a virtual group. Leaves should be other physical or virtual groups. Internal nodes of the tree are temporary groups.

A QueryNode must have a group name and a query. It may have a command (just used for convenient storage during conversion - this is not persisted). It may optionally have children and bindings.

See Also:

Serialized Form

Constructor Summary

QueryNode(java.lang.String groupName, java.lang.String query)
Construct a query node with the required parameters.

Method Summary

void	addBinding(java.lang.String binding) Add parameter binding to this node.
boolean	equals(java.lang.Object obj) Check whether nodes are equal based on their group name and children.
java.util.List	getBindings() Get list of bindings.
Command	getCommand() Get command corresponding to query, may be null
java.lang.String	getGroupName() Get fully-qualified group name
java.lang.String	getQuery() Get SQL query
int	hashCode() Get hash code for node
void	setBindings(java.util.List bindings) Set all of the bindings (existing are dropped)
void	setCommand(Command command) Set command - this is provided as a convenient place to cache this command during conversion.
void	setQuery(java.lang.String query) Set the SQL query
java.lang.String	toString() Print plantree structure starting at this node

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

QueryNode

public QueryNode(java.lang.String groupName,
                 java.lang.String query)

Construct a query node with the required parameters.

Parameters:

groupName - Fully qualified group name

query - SQL query

Method Detail

getGroupName

public java.lang.String getGroupName()

Get fully-qualified group name

Returns:

group name

getQuery

public java.lang.String getQuery()

Get SQL query

Returns:

SQL query

setQuery

public void setQuery(java.lang.String query)

Set the SQL query

Parameters:

String - query

addBinding

public void addBinding(java.lang.String binding)

Add parameter binding to this node. Bindings should be added in the order they appear in the query.

Parameters:

binding - Binding reference

getBindings

public java.util.List getBindings()

Get list of bindings.

Returns:

bindings

setBindings

public void setBindings(java.util.List bindings)

Set all of the bindings (existing are dropped)

Parameters:

bindings - New bindings

setCommand

public void setCommand(Command command)

Set command - this is provided as a convenient place to cache this command during conversion.

Parameters:

command - Command corresponding to query

getCommand

public Command getCommand()

Get command corresponding to query, may be null

Returns:

command Command corresponding to query

hashCode

public int hashCode()

Get hash code for node

Overrides:

hashCode in class java.lang.Object

Returns:

hash code

equals

public boolean equals(java.lang.Object obj)

Check whether nodes are equal based on their group name and children.

Overrides:

equals in class java.lang.Object

Parameters:

obj - Other node to compare with

Returns:

True if equal

toString

public java.lang.String toString()

Print plantree structure starting at this node

Overrides:

toString in class java.lang.Object

Returns:

String representing this node and all children under this node