com.metamatrix.query.sql.lang
Class XQuery

java.lang.Object
  com.metamatrix.query.sql.lang.Command
      com.metamatrix.query.sql.lang.XQuery

All Implemented Interfaces:

LanguageObject, java.io.Serializable, java.lang.Cloneable

public class XQuery
extends Command

An XQuery command object

See Also:

Serialized Form

Field Summary

Fields inherited from class com.metamatrix.query.sql.lang.Command

tempGroupIDs, TYPE_BATCHED_UPDATE, TYPE_CREATE, TYPE_DELETE, TYPE_DROP, TYPE_DYNAMIC, TYPE_INSERT, TYPE_QUERY, TYPE_SQL, TYPE_STORED_PROCEDURE, TYPE_UNKNOWN, TYPE_UPDATE, TYPE_UPDATE_PROCEDURE, TYPE_XQUERY

Constructor Summary

XQuery()

XQuery(java.lang.String xQuery, XQueryExpression compiledXQuery)

Method Summary

void	acceptVisitor(LanguageVisitor visitor) Method for accepting a visitor.
boolean	areResultsCachable() Whether the results are cachable.
java.lang.Object	clone() Return a copy of this SQLQuery.
boolean	equals(java.lang.Object obj) Compare two queries for equality.
XQueryExpression	getCompiledXQuery()
java.util.List	getProjectedSymbols() Get the ordered list of all elements returned by this query.
int	getType() Return type of command to make it easier to build switch statements by command type.
java.lang.String	getXQuery()
int	hashCode() Get hashcode for query.
java.lang.String	toString() Returns a string representation of an instance of this class.
int	updatingModelCount(QueryMetadataInterface metadata) Return the number of updates on physical sources by this command.

Methods inherited from class com.metamatrix.query.sql.lang.Command

addExternalGroupsToContext, addExternalGroupToContext, copyMetadataState, getAllExternalGroups, getExternalGroupContexts, getOption, getSubCommands, getSubCommandsUpdatingModelCount, getSubCommandsUpdatingModelCount, getTemporaryMetadata, getUpdateCommandSymbol, getUpdatesCommandSymbol, getVariableValues, getVirtualGroup, isResolved, printCommandTree, printCommandTree, pushNewResolvingContext, setExternalGroupContexts, setIsResolved, setOption, setTemporaryMetadata, setVariableValues, setVirtualGroup

Methods inherited from class java.lang.Object

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

Constructor Detail

XQuery

public XQuery()

XQuery

public XQuery(java.lang.String xQuery,
              XQueryExpression compiledXQuery)

Method Detail

getXQuery

public java.lang.String getXQuery()

getCompiledXQuery

public XQueryExpression getCompiledXQuery()

getType

public int getType()

Description copied from class: Command

Return type of command to make it easier to build switch statements by command type.

Specified by:

getType in class Command

Returns:

Type from TYPE constants

See Also:

Command.getType()

getProjectedSymbols

public java.util.List getProjectedSymbols()

Description copied from class: Command

Get the ordered list of all elements returned by this query. These elements may be ElementSymbols or ExpressionSymbols but in all cases each represents a single column.

Specified by:

getProjectedSymbols in class Command

Returns:

Ordered list of SingleElementSymbol

See Also:

Command.getProjectedSymbols()

equals

public boolean equals(java.lang.Object obj)

Compare two queries for equality. Queries will only evaluate to equal if they are IDENTICAL.

Overrides:

equals in class java.lang.Object

Parameters:

obj - Other object

Returns:

True if equal

hashCode

public int hashCode()

Get hashcode for query.

Overrides:

hashCode in class java.lang.Object

Returns:

Hash code

clone

public java.lang.Object clone()

Return a copy of this SQLQuery.

Specified by:

clone in interface LanguageObject

Specified by:

clone in class Command

Returns:

Deep or safe clone

acceptVisitor

public void acceptVisitor(LanguageVisitor visitor)

Description copied from interface: LanguageObject

Method for accepting a visitor. It is the responsibility of the language object to call back on the visitor.

Parameters:

visitor - Visitor being used

toString

public java.lang.String toString()

Returns a string representation of an instance of this class.

Overrides:

toString in class Command

Returns:

String representation of object

areResultsCachable

public boolean areResultsCachable()

Description copied from class: Command

Whether the results are cachable.

Specified by:

areResultsCachable in class Command

Returns:

True if the results are cachable; false otherwise.

See Also:

Command.areResultsCachable()

updatingModelCount

public int updatingModelCount(QueryMetadataInterface metadata)
                       throws MetaMatrixComponentException

Description copied from class: Command

Return the number of updates on physical sources by this command.

Specified by:

updatingModelCount in class Command

Parameters:

metadata - QueryMetadataInterface

Returns:

The number of updates on physical sources by this command.

Throws:

MetaMatrixComponentException