atg.repository
Class RepositoryViewImpl

java.lang.Object
  atg.repository.RepositoryViewImpl

All Implemented Interfaces:

NamedQueryView, RepositoryView

Direct Known Subclasses:

IntegrationRepositoryView

public abstract class RepositoryViewImpl
extends java.lang.Object
implements NamedQueryView

This is a basic implementation for the RepositoryView class. It implements properties for all of the settable values.

Field Summary

static java.lang.String	CLASS_VERSION Class version string
protected atg.repository.query.QueryCache	mCache currently active query cache
static java.lang.String	RESOURCE_BUNDLE_NAME

Constructor Summary

RepositoryViewImpl()

Method Summary

void	addNamedQuery(java.lang.String pQueryName, atg.repository.QueryDescriptor pDescriptor) Adds an entry to the named query map
void	addQueryListener(atg.repository.QueryListener pListener) Adds a query event listener from this view.
boolean	canCacheQuery(java.util.List pDependencies) You might override this method to try and deal with a subtle synchronization issue.
void	createNamedQuery(java.lang.String pQueryName, Query pQuery) Creates a named query.
abstract int	executeCountQuery(Query pQuery) Executes a query that returns the number of items that would be returned by given query.
RepositoryItem[]	executeQuery(Query pQuery) Executes the given query and returns an array of the matching RepositoryItems (not ids)
RepositoryItem[]	executeQuery(Query pQuery, int pStartingIndex) Executes the given query and returns an array of matching RepositoryItems, beginning at the starting index element.
RepositoryItem[]	executeQuery(Query pQuery, int pStartingIndex, int pEndingIndex) Executes the given query and returns an array of matching RepositoryItems, which are contained within a total potential result set.
RepositoryItem[]	executeQuery(Query pQuery, int pStartingIndex, int pEndingIndex, SortDirectives pSortDirectives) Executes the given query and returns an array of matching RepositoryItems, which are contained within a total potential result set.
RepositoryItem[]	executeQuery(Query pQuery, int pStartingIndex, SortDirectives pSortDirectives) Executes the given query and returns an array of matching RepositoryItems, beginning at the starting index element.
RepositoryItem[]	executeQuery(Query pQuery, QueryOptions pQueryOptions) Executes the given query and returns an array of the matching RepositoryItems (not ids)
RepositoryItem[]	executeQuery(Query pQuery, SortDirectives pSortDirectives) Executes the given query and returns an array of the matching RepositoryItems (not ids)
abstract RepositoryItem[]	executeUncachedQuery(Query pQuery, QueryOptions pOptions) Subclasses determine how query requests are actually satisfied
RepositoryItem[]	executeUncachedQuery(Query pQuery, QueryOptions pOptions, java.lang.Object[] pParameterValues) This is a stub implementation so that the QueryCache doesn't have to deal with specific RepositoryView implementations when it calls executeUncachedQuery() with variables.
atg.repository.query.QueryCache	getCache() Get property cache
boolean	getCacheQueries()
RepositoryItemDescriptor	getItemDescriptor() Returns the RepositoryItemDescriptor property, which describes the known properties for all the items in the view
Query	getNamedQuery(java.lang.String pQueryName) Gets the Repository Query corresponding to the given name
java.lang.String[]	getNamedQueryNames() Returns the names of all the named queries known by this view
abstract QueryBuilder	getQueryBuilder() Returns a QueryBuilder to use for creating Query objects
int	getQueryCacheSize()
atg.repository.QueryDescriptor	getQueryDescriptor(java.lang.String pQueryName) Gets the QueryDescriptor object associated with the given name.
long	getQueryExpireTimeout()
java.util.List	getQueryListeners() Returns the list of query listeners that are registered on this view.
java.lang.String	getQueryName(Query pQuery) Gets the name associated with the given Query, if any
Repository	getRepository() Get property Repository
java.lang.String	getViewName() Get property ViewName
void	invalidateQueryCache() Removes all entries from the query cache
void	removeNamedQuery(java.lang.String pQueryName) Removes an entry from the named query map
void	removeQueryDependency(atg.repository.query.QueryDependency pList) When a query cache entry is invalidated, we need to remove all cache entries that depend on the same set of properties, the QueryDependency.
void	removeQueryListener(atg.repository.QueryListener pListener) Removes a query event listener from this view.
void	sendQueryEvent(Query pQuery, QueryOptions pQueryOptions, RepositoryItem[] pResults) Sends a QueryEvent
void	setItemDescriptor(RepositoryItemDescriptor pItemDescriptor) Sets the property ItemDescriptor.
void	setQueryCacheSize(int pQueryCacheSize) Sets the property queryCacheSize.
void	setQueryExpireTimeout(long pQueryExpireTimeout) Sets the property query expire timeout.
void	setRepository(Repository pRepository) Set property Repository
void	setViewName(java.lang.String pViewName) Set property ViewName

Methods inherited from class java.lang.Object

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

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

RESOURCE_BUNDLE_NAME

public static final java.lang.String RESOURCE_BUNDLE_NAME

See Also:

Constant Field Values

mCache

protected atg.repository.query.QueryCache mCache

currently active query cache

Constructor Detail

RepositoryViewImpl

public RepositoryViewImpl()

Method Detail

getCache

public atg.repository.query.QueryCache getCache()

Get property cache

Returns:

cache

setViewName

public void setViewName(java.lang.String pViewName)

Set property ViewName

Parameters:

pViewName - new value to set

getViewName

public java.lang.String getViewName()

Get property ViewName

Specified by:

getViewName in interface RepositoryView

Returns:

ViewName

setRepository

public void setRepository(Repository pRepository)

Set property Repository

Parameters:

pRepository - new value to set

getRepository

public Repository getRepository()

Get property Repository

Returns:

Repository

setItemDescriptor

public void setItemDescriptor(RepositoryItemDescriptor pItemDescriptor)

Sets the property ItemDescriptor.

Parameters:

pItemDescriptor - new value to set

getItemDescriptor

public RepositoryItemDescriptor getItemDescriptor()

Description copied from interface: RepositoryView

Returns the RepositoryItemDescriptor property, which describes the known properties for all the items in the view

Specified by:

getItemDescriptor in interface RepositoryView

Returns:

The value of the property ItemDescriptor.

getCacheQueries

public boolean getCacheQueries()

Returns:

The value of the property CacheQueries. You disable query caching by setting QueryCacheSize to 0.

setQueryCacheSize

public void setQueryCacheSize(int pQueryCacheSize)

Sets the property queryCacheSize. This is the maximum number of queries to cache for this repository view. A value of 0 means to disable caching of queries. A value of -1 means to cache an unlimited number of queries for this view.

Parameters:

pQueryCacheSize - new value to set

getQueryCacheSize

public int getQueryCacheSize()

Returns:

The value of the property QueryCacheSize.

setQueryExpireTimeout

public void setQueryExpireTimeout(long pQueryExpireTimeout)

Sets the property query expire timeout. This is the maximum number of milliseconds a query can live in the cache

getQueryExpireTimeout

public long getQueryExpireTimeout()

Returns:

The value of the property QueryExpireTimeout.

addNamedQuery

public void addNamedQuery(java.lang.String pQueryName,
                          atg.repository.QueryDescriptor pDescriptor)

Adds an entry to the named query map

Parameters:

pQueryName - the name of the query to add

pDescriptor - the query descriptor describing the query

removeNamedQuery

public void removeNamedQuery(java.lang.String pQueryName)

Removes an entry from the named query map

Parameters:

pQueryName - the name of the query to remove

executeQuery

public RepositoryItem[] executeQuery(Query pQuery)
                              throws RepositoryException

Executes the given query and returns an array of the matching RepositoryItems (not ids)

Specified by:

executeQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

Returns:

null if no items could be found to match the query or if the repository does not support query operations

Throws:

RepositoryException - if there is an error while performing the query operation

executeQuery

public RepositoryItem[] executeQuery(Query pQuery,
                                     SortDirectives pSortDirectives)
                              throws RepositoryException

Executes the given query and returns an array of the matching RepositoryItems (not ids)

Specified by:

executeQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

pSortDirectives - the directives to sort the result set with

Returns:

null if no items could be found to match the query or if the repository does not support query operations

Throws:

RepositoryException - if there is an error while performing the query operation

executeQuery

public RepositoryItem[] executeQuery(Query pQuery,
                                     int pStartingIndex)
                              throws RepositoryException

Executes the given query and returns an array of matching RepositoryItems, beginning at the starting index element.

Specified by:

executeQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

pStartingIndex - the beginning index, inclusive

Returns:

null if no items could be found to match the query or if the repository does not support query operations

Throws:

RepositoryException - if there is an error while performing the query operation

executeQuery

public RepositoryItem[] executeQuery(Query pQuery,
                                     int pStartingIndex,
                                     SortDirectives pSortDirectives)
                              throws RepositoryException

Executes the given query and returns an array of matching RepositoryItems, beginning at the starting index element.

Specified by:

executeQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

pStartingIndex - the beginning index, inclusive

pSortDirectives - the directives to sort the result set with

Returns:

null if no items could be found to match the query or if the repository does not support query operations

Throws:

RepositoryException - if there is an error while performing the query operation

executeQuery

public RepositoryItem[] executeQuery(Query pQuery,
                                     int pStartingIndex,
                                     int pEndingIndex)
                              throws RepositoryException

Executes the given query and returns an array of matching RepositoryItems, which are contained within a total potential result set. For example used if one wanted to retrieve elements 50-60 from a query which could return 100 elements.

Specified by:

executeQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

pStartingIndex - the beginning index, inclusive

pEndingIndex - the ending index, exclusive.

Returns:

null if no items could be found to match the query or if the repository does not support query operations

Throws:

RepositoryException - if there is an error while performing the query operation

getQueryBuilder

public abstract QueryBuilder getQueryBuilder()

Returns a QueryBuilder to use for creating Query objects

Specified by:

getQueryBuilder in interface RepositoryView

Returns:

null if the RepositoryView does not support query operations

executeQuery

public RepositoryItem[] executeQuery(Query pQuery,
                                     int pStartingIndex,
                                     int pEndingIndex,
                                     SortDirectives pSortDirectives)
                              throws RepositoryException

Executes the given query and returns an array of matching RepositoryItems, which are contained within a total potential result set. For example used if one wanted to retrieve elements 50-60 from a query which could return 100 elements.

Specified by:

executeQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

pStartingIndex - the beginning index, inclusive

pEndingIndex - the ending index, exclusive.

pSortDirectives - the directives to sort the result set with

Returns:

null if no items could be found to match the query or if the RepositoryView does not support query operations

Throws:

RepositoryException - if there is an error while performing the query operation

executeQuery

public RepositoryItem[] executeQuery(Query pQuery,
                                     QueryOptions pQueryOptions)
                              throws RepositoryException

Executes the given query and returns an array of the matching RepositoryItems (not ids)

Specified by:

executeQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

pQueryOptions - A set of options that may modify the query

Returns:

null if no items could be found to match the query or if the RepositoryView does not support query operations

Throws:

RepositoryException - if there is an error while performing the query operation

createNamedQuery

public void createNamedQuery(java.lang.String pQueryName,
                             Query pQuery)

Creates a named query. This identifies an association between a String name and a Repository Query object. Users can then execute the named Query over and over again without having to rebuild the Query object or its QueryExpressions

Specified by:

createNamedQuery in interface NamedQueryView

Parameters:

pQueryName - the name of the query

pQuery - the Query object associated with the name

getNamedQuery

public Query getNamedQuery(java.lang.String pQueryName)

Gets the Repository Query corresponding to the given name

Specified by:

getNamedQuery in interface NamedQueryView

Parameters:

pQueryName - the name of the query to retrieve

Returns:

the Repository Query identified by pQueryName or null if no Query exists by that name

getQueryName

public java.lang.String getQueryName(Query pQuery)

Gets the name associated with the given Query, if any

Specified by:

getQueryName in interface NamedQueryView

Parameters:

pQuery - the query to get the name for

Returns:

the name associated with the given Query, or null if the Query has no name associated with it

getNamedQueryNames

public java.lang.String[] getNamedQueryNames()

Returns the names of all the named queries known by this view

Specified by:

getNamedQueryNames in interface NamedQueryView

Returns:

an array of names for all the named queries known by this view

getQueryDescriptor

public atg.repository.QueryDescriptor getQueryDescriptor(java.lang.String pQueryName)

Gets the QueryDescriptor object associated with the given name. If no such descriptor exists in this particular view, then any parent views will be checked as well.

Specified by:

getQueryDescriptor in interface NamedQueryView

Parameters:

pQueryName - the name of the named query to get the QueryDescriptor for

Returns:

the QueryDescriptor for the given name, or null if none exists

executeCountQuery

public abstract int executeCountQuery(Query pQuery)
                               throws RepositoryException

Executes a query that returns the number of items that would be returned by given query.

Specified by:

executeCountQuery in interface RepositoryView

Parameters:

pQuery - the query to execute

Returns:

The number of RepositoryItems that would be returned by executeQuery(pQuery)

Throws:

RepositoryException - if there is an error while performing the query operation

executeUncachedQuery

public abstract RepositoryItem[] executeUncachedQuery(Query pQuery,
                                                      QueryOptions pOptions)
                                               throws RepositoryException

Subclasses determine how query requests are actually satisfied

Throws:

RepositoryException

executeUncachedQuery

public RepositoryItem[] executeUncachedQuery(Query pQuery,
                                             QueryOptions pOptions,
                                             java.lang.Object[] pParameterValues)
                                      throws RepositoryException

This is a stub implementation so that the QueryCache doesn't have to deal with specific RepositoryView implementations when it calls executeUncachedQuery() with variables. Those methods should never be called by non-variable enabled repositories anyway, so this is a precaution

Parameters:

pQuery - the query to execute

pQueryOptions - A set of options that may modify the query

pParameterValues - values of any parameter expressions that are in the given query. Each expression is replaced in the order that it is encountered with the corresponding parameter value e.g. the first parameter is replaced with pParameterValues[0], the second parameter is replaced with pParameterValues[1], etc.

Throws:

RepositoryException

invalidateQueryCache

public void invalidateQueryCache()

Removes all entries from the query cache

canCacheQuery

public boolean canCacheQuery(java.util.List pDependencies)

You might override this method to try and deal with a subtle synchronization issue. In the midst of a transaction, if you've modified items in that transaction, queries you make will show these new results. This might cause the query to be cached prematurely with the new information, or worse the transaction could be rolled back and those changes would have been commited in the query cache. This method also checks to make sure that the query is itself cacheable based on what we found out from the nested query nodes.

removeQueryDependency

public void removeQueryDependency(atg.repository.query.QueryDependency pList)

When a query cache entry is invalidated, we need to remove all cache entries that depend on the same set of properties, the QueryDependency. We also remove our notion of these properties since who knows if anyone will make a query with this set of properties again.

In some cases, it might make sense to leave the property list around so that we don't have to add the listeners, but I think it is simpler/safer to just clean up the mess.

Parameters:

pList - dependencies to use in finding entries to invalidate

addQueryListener

public void addQueryListener(atg.repository.QueryListener pListener)

Adds a query event listener from this view.

removeQueryListener

public void removeQueryListener(atg.repository.QueryListener pListener)

Removes a query event listener from this view.

getQueryListeners

public java.util.List getQueryListeners()

Returns the list of query listeners that are registered on this view.

sendQueryEvent

public void sendQueryEvent(Query pQuery,
                           QueryOptions pQueryOptions,
                           RepositoryItem[] pResults)

Sends a QueryEvent