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Oracle Fusion Middleware Java API Reference for Oracle TopLink 11g Release 1 (11.1.1) E28847-01 |
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java.lang.Object
org.eclipse.persistence.queries.Cursor
public abstract class Cursor
Purpose: Abstract class for CursoredStream and ScrolableCursor
Field Summary | |
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protected org.eclipse.persistence.internal.sessions.AbstractSession |
executionSession The root session that executed the call for the query. |
protected java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> |
fields The fields expected in the result set. |
protected java.util.Map<java.lang.Object,java.lang.Object> |
initiallyConformingIndex Conforming instances found in memory when building the result. |
protected org.eclipse.persistence.internal.sessions.AbstractRecord |
nextRow Store the next row, for 1-m joining. |
protected java.util.List<java.lang.Object> |
objectCollection Internal collection of objects. |
CursorPolicy |
policy Query policy that initialize the stream. |
protected int |
position Current position in the objectCollection of the stream. |
ReadQuery |
query Read query that initialize the stream. |
protected java.sql.ResultSet |
resultSet The result set (cursor) that holds the handle to the database that the results are read from. |
protected Expression |
selectionCriteriaClone SelectionCriteria & translation row ready for incremental conforming. |
protected org.eclipse.persistence.internal.sessions.AbstractSession |
session The session that executed the query for the stream. |
protected int |
size Cached size of the stream. |
protected java.sql.Statement |
statement The preparedStatement that holds the handle to the database that the results are read from. |
protected org.eclipse.persistence.internal.sessions.AbstractRecord |
translationRow |
Constructor Summary | |
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Cursor() INTERNAL: Default constructor. |
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Cursor(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call, CursorPolicy policy) INTERNAL: |
Method Summary | |
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protected java.lang.Object |
buildAndRegisterObject(org.eclipse.persistence.internal.sessions.AbstractRecord row) INTERNAL: builds and registers an object from a row for cursors. |
void |
clear() PUBLIC: Release all objects read in so far. |
void |
close() PUBLIC: Closes the stream. |
protected void |
finalize() Close in case not closed. |
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor |
getAccessor() INTERNAL: Return the accessor associated with the cursor. |
protected abstract int |
getCursorSize() INTERNAL: Retrieve the size of the open cursor by executing a count on the same query as the cursor. |
org.eclipse.persistence.internal.sessions.AbstractSession |
getExecutionSession() INTERNAL: Returns the session the underlying call was executed on. |
java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> |
getFields() INTERNAL: Return the fields for the stream. |
java.util.Map<java.lang.Object,java.lang.Object> |
getInitiallyConformingIndex() INTERNAL: Conforming instances found in memory when building the result. |
java.util.List<java.lang.Object> |
getObjectCollection() INTERNAL: Return the internal object collection that stores the objects. |
int |
getPageSize() INTERNAL: Return the number of items to be faulted in for the stream. |
CursorPolicy |
getPolicy() INTERNAL: Return the cursor policy. |
abstract int |
getPosition() INTERNAL: Return the position of the stream inside the object collection. |
ReadQuery |
getQuery() INTERNAL: Return the query associated with the stream. |
java.sql.ResultSet |
getResultSet() INTERNAL: Return the result set (cursor). |
Expression |
getSelectionCriteriaClone() INTERNAL: The clone of the selection criteria is needed for in-memory conforming each object read from the Cursor. |
org.eclipse.persistence.internal.sessions.AbstractSession |
getSession() INTERNAL: Return the handle to the session |
protected java.sql.Statement |
getStatement() INTERNAL: Return the Statement. |
protected org.eclipse.persistence.internal.sessions.AbstractRecord |
getTranslationRow() INTERNAL: Gets the translation row the query was executed with, used for incremental conforming. |
boolean |
isClosed() PUBLIC: Return if the stream is closed. |
void |
remove() PUBLIC: Remove is not support with cursors. |
protected abstract java.lang.Object |
retrieveNextObject() INTERNAL: Read the next row from the result set. |
protected void |
setExecutionSession(org.eclipse.persistence.internal.sessions.AbstractSession executionSession) INTERNAL: Sets the session the underlying call was executed on. |
protected void |
setFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> fields) INTERNAL: Set the fields for the stream. |
void |
setInitiallyConformingIndex(java.util.Map<java.lang.Object,java.lang.Object> index) INTERNAL: Conforming instances found in memory when building the result. |
void |
setObjectCollection(java.util.List<java.lang.Object> collection) INTERNAL: Set the internal object collection |
void |
setPolicy(CursorPolicy policy) INTERNAL: Set the cursor policy. |
protected void |
setPosition(int value) INTERNAL: Set the current position of the stream |
protected void |
setResultSet(java.sql.ResultSet result) INTERNAL: Set the result set (cursor) |
void |
setSelectionCriteriaClone(Expression expression) INTERNAL: The clone of the selection criteria is needed for in-memory conforming each object read from the Cursor. |
void |
setSession(org.eclipse.persistence.internal.sessions.AbstractSession databaseSession) INTERNAL: Set the session handle |
void |
setSize(int size) INTERNAL: Set the cache size |
void |
setTranslationRow(org.eclipse.persistence.internal.sessions.AbstractRecord row) INTERNAL: Sets the translation row this query was executed with. |
int |
size() PUBLIC: Retrieve the size of the open cursor by executing a count on the same query as the cursor. |
Methods inherited from class java.lang.Object |
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clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface java.util.Enumeration |
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hasMoreElements, nextElement |
Methods inherited from interface java.util.Iterator |
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hasNext, next |
Field Detail |
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protected transient java.sql.Statement statement
protected transient java.sql.ResultSet resultSet
protected transient org.eclipse.persistence.internal.sessions.AbstractSession session
protected transient org.eclipse.persistence.internal.sessions.AbstractSession executionSession
protected transient java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> fields
protected int size
public transient ReadQuery query
public transient CursorPolicy policy
protected java.util.List<java.lang.Object> objectCollection
protected java.util.Map<java.lang.Object,java.lang.Object> initiallyConformingIndex
protected Expression selectionCriteriaClone
protected org.eclipse.persistence.internal.sessions.AbstractRecord translationRow
protected org.eclipse.persistence.internal.sessions.AbstractRecord nextRow
protected int position
Constructor Detail |
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public Cursor()
public Cursor(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call, CursorPolicy policy)
Method Detail |
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public void close() throws DatabaseException
DatabaseException
protected void finalize() throws DatabaseException
finalize
in class java.lang.Object
DatabaseException
public org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor getAccessor()
protected abstract int getCursorSize() throws DatabaseException, QueryException
DatabaseException
QueryException
public java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> getFields()
public java.util.Map<java.lang.Object,java.lang.Object> getInitiallyConformingIndex()
public java.util.List<java.lang.Object> getObjectCollection()
public int getPageSize()
public CursorPolicy getPolicy()
public abstract int getPosition()
public ReadQuery getQuery()
public java.sql.ResultSet getResultSet()
public Expression getSelectionCriteriaClone()
public org.eclipse.persistence.internal.sessions.AbstractSession getSession()
public org.eclipse.persistence.internal.sessions.AbstractSession getExecutionSession()
protected java.sql.Statement getStatement()
protected org.eclipse.persistence.internal.sessions.AbstractRecord getTranslationRow()
public boolean isClosed()
protected java.lang.Object buildAndRegisterObject(org.eclipse.persistence.internal.sessions.AbstractRecord row)
protected abstract java.lang.Object retrieveNextObject() throws DatabaseException
DatabaseException
protected void setFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> fields)
public void setInitiallyConformingIndex(java.util.Map<java.lang.Object,java.lang.Object> index)
public void setObjectCollection(java.util.List<java.lang.Object> collection)
public void setPolicy(CursorPolicy policy)
protected void setPosition(int value)
protected void setResultSet(java.sql.ResultSet result)
public void setSelectionCriteriaClone(Expression expression)
public void setSession(org.eclipse.persistence.internal.sessions.AbstractSession databaseSession)
protected void setExecutionSession(org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
public void setSize(int size)
public void setTranslationRow(org.eclipse.persistence.internal.sessions.AbstractRecord row)
public int size() throws DatabaseException
DatabaseException
public void remove() throws QueryException
remove
in interface java.util.Iterator
QueryException
public void clear()
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