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org.objectstyle.cayenne.access.util
Class SelectObserver  

java.lang.Object
  org.objectstyle.cayenne.access.util.DefaultOperationObserver
      org.objectstyle.cayenne.access.util.SelectObserver

All Implemented Interfaces:

org.objectstyle.cayenne.access.OperationHints, org.objectstyle.cayenne.access.OperationObserver

Direct Known Subclasses:

ContextSelectObserver

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public class SelectObserver

extends DefaultOperationObserver

OperationObserver that accumulates select query results provided by callback methods. Later the results can be retrieved via different getResults methods.

This class can serve as a helper for classes that work with DataNode directly, bypassing DataContext. Also it is used by DataContext to implement "data rows" functionality - retrieving data without instantiating and registering DataObjects.

If exceptions happen during the execution, they are immediately rethrown.

For more information see Cayenne User Guide.

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Field Summary
protected  java.util.Map	results
protected  int	selectCount

 

Fields inherited from class org.objectstyle.cayenne.access.util.DefaultOperationObserver

DEFAULT_LOG_LEVEL, globalExceptions, loggingLevel, queryExceptions, transactionCommitted, transactionRolledback

 

Constructor Summary

SelectObserver()

SelectObserver(org.apache.log4j.Level logLevel)

 

Method Summary
void	clear()           Clears fetched objects stored in an internal list.
java.util.Map	getResults()           Returns query results accumulated during query execution with this object as an operation observer.
java.util.List	getResults(org.objectstyle.cayenne.query.Query q)           Returns a list of result snapshots for the specified query, or null if this query has never produced any results.
int	getSelectCount()           Returns a count of select queries that returned results since the last time "clear" was called, or since this object was created.
void	nextDataRows(org.objectstyle.cayenne.query.Query query, java.util.List dataRows)           Stores all objects in dataRows in an internal result list.
void	nextGlobalException(java.lang.Exception ex)           Overrides superclass implementation to rethrow an exception immediately.
void	nextQueryException(org.objectstyle.cayenne.query.Query query, java.lang.Exception ex)           Overrides superclass implementation to rethrow an exception immediately.

 

Methods inherited from class org.objectstyle.cayenne.access.util.DefaultOperationObserver

getGlobalExceptions, getLoggingLevel, getQueryExceptions, hasExceptions, isIteratedResult, isTransactionCommitted, isTransactionRolledback, nextBatchCount, nextCount, nextDataRows, printExceptions, setLoggingLevel, transactionCommitted, transactionRolledback, useAutoCommit

 

Methods inherited from class java.lang.Object

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

 

Field Detail

results

protected java.util.Map results

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selectCount

protected int selectCount

Constructor Detail

SelectObserver

public SelectObserver()

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SelectObserver

public SelectObserver(org.apache.log4j.Level logLevel)

Method Detail

getSelectCount

public int getSelectCount()

Returns a count of select queries that returned results since the last time "clear" was called, or since this object was created.

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getResults

public java.util.List getResults(org.objectstyle.cayenne.query.Query q)

Returns a list of result snapshots for the specified query, or null if this query has never produced any results.

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getResults

public java.util.Map getResults()

Returns query results accumulated during query execution with this object as an operation observer.

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clear

public void clear()

Clears fetched objects stored in an internal list.

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nextDataRows

public void nextDataRows(org.objectstyle.cayenne.query.Query query,
                         java.util.List dataRows)

Stores all objects in dataRows in an internal result list.

Specified by:

nextDataRows in interface org.objectstyle.cayenne.access.OperationObserver

Overrides:

nextDataRows in class DefaultOperationObserver

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nextQueryException

public void nextQueryException(org.objectstyle.cayenne.query.Query query,
                               java.lang.Exception ex)

Overrides superclass implementation to rethrow an exception immediately.

Specified by:

nextQueryException in interface org.objectstyle.cayenne.access.OperationObserver

Overrides:

nextQueryException in class DefaultOperationObserver

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nextGlobalException

public void nextGlobalException(java.lang.Exception ex)

Overrides superclass implementation to rethrow an exception immediately.

Specified by:

nextGlobalException in interface org.objectstyle.cayenne.access.OperationObserver

Overrides:

nextGlobalException in class DefaultOperationObserver

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Home >> All >> org >> objectstyle >> cayenne >> access >> [ util overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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