Package helma.objectmodel.db
Class WrappedNodeManager
- java.lang.Object
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- helma.objectmodel.db.WrappedNodeManager
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public final class WrappedNodeManager extends java.lang.Object
A wrapper around NodeManager that catches most Exceptions, or rethrows them as RuntimeExceptions. The idea behind this is that we don't care a lot about Exception classes, since Hop programming is done in JavaScript which doesn't know about them (except for the exception message).
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Constructor Summary
Constructors Constructor Description WrappedNodeManager(NodeManager nmgr)
Creates a new WrappedNodeManager object.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
countNodes(Node home, Relation rel)
Count the nodes contained in the given Node's collection specified by the given Relation.void
deleteNode(Node node)
Delete a node from the databasevoid
evictKey(Key key)
Evict the object with the given key from the object cachevoid
evictNode(Node node)
Evict a node from the object cachevoid
evictNodeByKey(Key key)
Completely evict the object with the given key from the object cachejava.lang.String
generateID(DbMapping map)
Generate a new id for an object specified by the DbMappingjava.lang.Object[]
getCacheEntries()
Get an array of all objects in the object cacheDbMapping
getDbMapping(java.lang.String name)
Get the DbMapping corresponding to a type nameNode
getNode(Key key)
Get a node given its keyNode
getNode(Node home, java.lang.String id, Relation rel)
Get the node specified by the given id and Relation.Node
getNode(java.lang.String id, DbMapping dbmap)
Get a node given its id and DbMappingjava.util.List
getNodeIDs(Node home, Relation rel)
Get a list of IDs of nodes contained in the given Node's collection specified by the given Relation.java.util.List
getNodes(Node home, Relation rel)
Get the list of nodes contained in the collection of the given Node specified by the given Relation.java.util.Vector
getPropertyNames(Node home, Relation rel)
Get a list of property names from the given node.Node
getRootNode()
Gets the application's root node.boolean
isRootNode(Node node)
Checks if the given node is the application's root node.void
logEvent(java.lang.String msg)
Write an entry to the application's event logvoid
prefetchNodes(Node node, Relation rel, SubnodeList list, int start, int length)
void
registerNode(Node node)
Register a node with the object cache using its primary key.void
registerNode(Node node, Key key)
Register a node with the object cache using the given key.
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Constructor Detail
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WrappedNodeManager
public WrappedNodeManager(NodeManager nmgr)
Creates a new WrappedNodeManager object.- Parameters:
nmgr
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Method Detail
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getNode
public Node getNode(java.lang.String id, DbMapping dbmap)
Get a node given its id and DbMapping- Parameters:
id
-dbmap
-- Returns:
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getNode
public Node getNode(Node home, java.lang.String id, Relation rel)
Get the node specified by the given id and Relation.- Parameters:
home
-id
-rel
-- Returns:
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getNodes
public java.util.List getNodes(Node home, Relation rel)
Get the list of nodes contained in the collection of the given Node specified by the given Relation.- Parameters:
home
-rel
-- Returns:
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getNodeIDs
public java.util.List getNodeIDs(Node home, Relation rel)
Get a list of IDs of nodes contained in the given Node's collection specified by the given Relation.- Parameters:
home
-rel
-- Returns:
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countNodes
public int countNodes(Node home, Relation rel)
Count the nodes contained in the given Node's collection specified by the given Relation.- Parameters:
home
-rel
-- Returns:
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prefetchNodes
public void prefetchNodes(Node node, Relation rel, SubnodeList list, int start, int length)
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deleteNode
public void deleteNode(Node node)
Delete a node from the database- Parameters:
node
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getPropertyNames
public java.util.Vector getPropertyNames(Node home, Relation rel)
Get a list of property names from the given node. TODO: this retrieves access names of child nodes, not property names- Parameters:
home
-rel
-- Returns:
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registerNode
public void registerNode(Node node)
Register a node with the object cache using its primary key.- Parameters:
node
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registerNode
public void registerNode(Node node, Key key)
Register a node with the object cache using the given key.- Parameters:
node
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evictNode
public void evictNode(Node node)
Evict a node from the object cache- Parameters:
node
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evictNodeByKey
public void evictNodeByKey(Key key)
Completely evict the object with the given key from the object cache- Parameters:
key
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evictKey
public void evictKey(Key key)
Evict the object with the given key from the object cache- Parameters:
key
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generateID
public java.lang.String generateID(DbMapping map)
Generate a new id for an object specified by the DbMapping- Parameters:
map
- the DbMapping to generate an id for- Returns:
- a new unique id
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getRootNode
public Node getRootNode()
Gets the application's root node.
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isRootNode
public boolean isRootNode(Node node)
Checks if the given node is the application's root node.
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getCacheEntries
public java.lang.Object[] getCacheEntries()
Get an array of all objects in the object cache
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logEvent
public void logEvent(java.lang.String msg)
Write an entry to the application's event log- Parameters:
msg
- event message
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getDbMapping
public DbMapping getDbMapping(java.lang.String name)
Get the DbMapping corresponding to a type name- Parameters:
name
- a type name- Returns:
- the corresponding DbMapping
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