java.lang.Object
- org.apache.derby.iapi.services.context.ContextImpl

All Implemented Interfaces:

Context

Direct Known Subclasses:

ClassFactoryContext, CompilerContextImpl, DatabaseContextImpl, EmbedConnectionContext, GenericExecutionContext, GenericLanguageConnectionContext, GenericStatementContext, RAMTransactionContext, ServiceBootContext, SystemContext, XactContext, XATransactionState
```
public abstract class ContextImpl
extends java.lang.Object
implements Context
```
Contexts are created and used to manage the execution environment. They provide a convenient location for storing globals organized by the module using the globals.
We provide this abstract class for other implementations to use so that they can simply add fields and operations on them. To be usable by the context manager, the subclasses must define CleanupOnError and call super() in any constructor.
Contexts assist in cleanup when errors are caught in the outer block.
Contexts implement the sanity interface to check and provide information about their contents.

Field Summary

Fields
Modifier and Type Field Description

private ContextManager myContextManager

private java.lang.String myIdName

Constructor Summary

Constructors
Modifier Constructor Description

protected ContextImpl(ContextManager cm, java.lang.String id)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.StringBuffer`	`appendErrorInfo()`
`ContextManager`	`getContextManager()`	Returns the context manager that has stored this context in its stack.
`java.lang.String`	`getIdName()`	Returns the current id name associated with this context.
`boolean`	`isLastHandler(int severity)`	Return whether or not this context is the "last" handler for a the specified severity level.
`void`	`popMe()`	Pop myself of the context stack.
`void`	`pushMe()`	Push myself onto my context stack.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.derby.iapi.services.context.Context
cleanupOnError

- Field Detail
  - myIdName
```
private final java.lang.String myIdName
```
  - myContextManager
```
private final ContextManager myContextManager
```
- Constructor Detail
  - ContextImpl
```
protected ContextImpl(ContextManager cm,
                      java.lang.String id)
```
- Method Detail
  - getContextManager
```
public final ContextManager getContextManager()
```
    Description copied from interface: Context
    
    Returns the context manager that has stored this context in its stack.
    
    Specified by:
    
    getContextManager in interface Context
    
    See Also:
    
    Context.getContextManager()
  - getIdName
```
public final java.lang.String getIdName()
```
    Description copied from interface: Context
    
    Returns the current id name associated with this context. Contexts are placed into stacks by id, in a context manager. Null if the context is not assigned to an id. Contexts known by context managers are always assigned to an id.
    A default Id name should be defined in each specific context interface as a static final field with the name CONTEXT_ID. For example, see org.apache.derby.iapi.sql.compile.CompilerContext.CONTEXT_ID.
    
    Specified by:
    
    getIdName in interface Context
    
    See Also:
    
    Context.getIdName()
  - pushMe
```
public final void pushMe()
```
    Description copied from interface: Context
    
    Push myself onto my context stack.
    
    Specified by:
    
    pushMe in interface Context
  - popMe
```
public final void popMe()
```
    Description copied from interface: Context
    
    Pop myself of the context stack.
    
    Specified by:
    
    popMe in interface Context
    
    See Also:
    
    Context.popMe()
  - isLastHandler
```
public boolean isLastHandler(int severity)
```
    Description copied from interface: Context
    
    Return whether or not this context is the "last" handler for a the specified severity level. Previously, the context manager would march through all of the contexts in cleanupOnError() and call each of their cleanupOnError() methods. That did not work with server side JDBC, especially for a StatementException, because outer contexts could get cleaned up incorrectly. This functionality is specific to the Language system. Any non-language system contexts should return ExceptionSeverity.NOT_APPLICABLE_SEVERITY. NOTE: Both the LanguageConnectionContext and the JDBC Connection Context are interested in session level errors because they both have clean up to do. This method allows both of them to return false so that all such handlers under them can do their clean up.
    
    Specified by:
    
    isLastHandler in interface Context
    
    See Also:
    
    Context.isLastHandler(int)
  - appendErrorInfo
```
public java.lang.StringBuffer appendErrorInfo()
```

Modifier and Type	Field	Description
`private ContextManager`	`myContextManager`
`private java.lang.String`	`myIdName`

Class ContextImpl

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.derby.iapi.services.context.Context

Field Detail

myIdName

myContextManager

Constructor Detail

ContextImpl

Method Detail

getContextManager

getIdName

pushMe

popMe

isLastHandler

appendErrorInfo