Modifier and Type	Class and Description
private static interface	DerbyConcatFunction.StringJoinTemplate
private static interface	DerbyConcatFunction.StringTransformer

Modifier and Type	Field and Description
private static final DerbyConcatFunction.StringTransformer	CAST_STRING_TRANSFORMER
private static final DerbyConcatFunction.StringTransformer	NO_TRANSFORM_STRING_TRANSFORMER

Access	Constructor and Description
public	DerbyConcatFunction()

Method Summary

Modifier and Type	Method and Description
public Type	getReturnType(Type The type of the first argument argumentType, Mapping The mapping source. mapping) Implements org.hibernate.dialect.function.SQLFunction.getReturnType. The return type of the function.
public boolean	hasArguments() Implements org.hibernate.dialect.function.SQLFunction.hasArguments. Does this function have any arguments?
public boolean	hasParenthesesIfNoArguments() Implements org.hibernate.dialect.function.SQLFunction.hasParenthesesIfNoArguments. If there are no arguments, are parentheses required?
private static String	join(Iterator<E> elements, DerbyConcatFunction.StringTransformer elementTransformer, DerbyConcatFunction.StringJoinTemplate template)
public String	render(Type The type of the first argument argumentType, List<E> The function arguments args, SessionFactoryImplementor The SessionFactory factory) Implements org.hibernate.dialect.function.SQLFunction.render. Deprecated as a consequence of `SessionFactoryImplementor` being deprecated. Render the function call as SQL fragment.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

CAST_STRING_TRANSFORMER	back to summary
private static final DerbyConcatFunction.StringTransformer CAST_STRING_TRANSFORMER

NO_TRANSFORM_STRING_TRANSFORMER	back to summary
private static final DerbyConcatFunction.StringTransformer NO_TRANSFORM_STRING_TRANSFORMER

Constructor Detail

DerbyConcatFunction	back to summary
public DerbyConcatFunction()

Method Detail

getReturnType back to summary

getReturnType	back to summary
public Type getReturnType(Type argumentType, Mapping mapping) throws QueryException Implements org.hibernate.dialect.function.SQLFunction.getReturnType. Doc from org.hibernate.dialect.function.SQLFunction.getReturnType. The return type of the function. May be either a concrete type which is preset, or variable depending upon the type of the first function argument. Note, the 'firstArgumentType' parameter should match the one passed into `render` Here we always return `StandardBasicTypes#STRING`. Parameters argumentType:Type The type of the first argument mapping:Mapping The mapping source. Returns:Type The type to be expected as a return. Annotations @Override Exceptions QueryException: Indicates an issue resolving the return type.

public Type getReturnType(Type argumentType, Mapping mapping) throws QueryException

Implements org.hibernate.dialect.function.SQLFunction.getReturnType.

Doc from org.hibernate.dialect.function.SQLFunction.getReturnType.

The return type of the function. May be either a concrete type which is preset, or variable depending upon the type of the first function argument.

Note, the 'firstArgumentType' parameter should match the one passed into render

Here we always return StandardBasicTypes#STRING.

Parameters

argumentType:Type: The type of the first argument
mapping:Mapping: The mapping source.

Returns:Type

The type to be expected as a return.

Annotations

@Override

Exceptions

QueryException:: Indicates an issue resolving the return type.

hasArguments back to summary

hasArguments	back to summary
public boolean hasArguments() Implements org.hibernate.dialect.function.SQLFunction.hasArguments. Doc from org.hibernate.dialect.function.SQLFunction.hasArguments. Does this function have any arguments? Here we always return `true` Returns:boolean True if the function expects to have parameters; false otherwise. Annotations @Override

public boolean hasArguments()

Implements org.hibernate.dialect.function.SQLFunction.hasArguments.

Doc from org.hibernate.dialect.function.SQLFunction.hasArguments.

Does this function have any arguments?

Here we always return true

Returns:boolean

True if the function expects to have parameters; false otherwise.

Annotations

@Override

hasParenthesesIfNoArguments back to summary

hasParenthesesIfNoArguments	back to summary
public boolean hasParenthesesIfNoArguments() Implements org.hibernate.dialect.function.SQLFunction.hasParenthesesIfNoArguments. Doc from org.hibernate.dialect.function.SQLFunction.hasParenthesesIfNoArguments. If there are no arguments, are parentheses required? Here we always return `true` Returns:boolean True if a no-arg call of this function requires parentheses. Annotations @Override

public boolean hasParenthesesIfNoArguments()

Implements org.hibernate.dialect.function.SQLFunction.hasParenthesesIfNoArguments.

Doc from org.hibernate.dialect.function.SQLFunction.hasParenthesesIfNoArguments.

If there are no arguments, are parentheses required?

Here we always return true

Returns:boolean

True if a no-arg call of this function requires parentheses.

Annotations

@Override

join	back to summary
private static String join(Iterator<E> elements, DerbyConcatFunction.StringTransformer elementTransformer, DerbyConcatFunction.StringJoinTemplate template)

render back to summary

render	back to summary
public String render(Type argumentType, List<E> args, SessionFactoryImplementor factory) throws QueryException Implements org.hibernate.dialect.function.SQLFunction.render. Doc from org.hibernate.dialect.function.SQLFunction.render. Deprecated as a consequence of `SessionFactoryImplementor` being deprecated. See corresponding docs for further information. Render the function call as SQL fragment. Note, the 'firstArgumentType' parameter should match the one passed into `getReturnType` Here's the meat.. The whole reason we have a separate impl for this for Derby is to re-define this method. The logic here says that if not all the incoming args are dynamic parameters (i.e. `?`) then we simply use the Derby concat operator (`\|\|`) on the unchanged arg elements. However, if all the args are dynamic parameters, then we need to wrap the individual arg elements in `cast` function calls, use the concatenation operator on the `cast` returns, and then wrap that whole thing in a call to the Derby `varchar` function. Parameters argumentType:Type The type of the first argument args:List<E> The function arguments factory:SessionFactoryImplementor The SessionFactory Returns:String The rendered function call Annotations @Override Exceptions QueryException: Indicates a problem rendering the function call.

public String render(Type argumentType, List<E> args, SessionFactoryImplementor factory) throws QueryException

Implements org.hibernate.dialect.function.SQLFunction.render.

Doc from org.hibernate.dialect.function.SQLFunction.render.

Deprecated

as a consequence of SessionFactoryImplementor being deprecated. See corresponding docs for further information.

Render the function call as SQL fragment.

Note, the 'firstArgumentType' parameter should match the one passed into getReturnType

Here's the meat.. The whole reason we have a separate impl for this for Derby is to re-define this method. The logic here says that if not all the incoming args are dynamic parameters (i.e. ?) then we simply use the Derby concat operator (||) on the unchanged arg elements. However, if all the args are dynamic parameters, then we need to wrap the individual arg elements in cast function calls, use the concatenation operator on the cast returns, and then wrap that whole thing in a call to the Derby varchar function.

Parameters

argumentType:Type: The type of the first argument
args:List<E>: The function arguments
factory:SessionFactoryImplementor: The SessionFactory

Returns:String

The rendered function call

Annotations

@Override

Exceptions

QueryException:: Indicates a problem rendering the function call.

org.hibernate.dialect.function back to summary

private Interface DerbyConcatFunction.StringJoinTemplate

Method Summary

Modifier and Type	Method and Description
public String	Returns: Value for property 'beginning'. getBeginning() Getter for property 'beginning'.
public String	Returns: Value for property 'ending'. getEnding() Getter for property 'ending'.
public String	Returns: Value for property 'separator'. getSeparator() Getter for property 'separator'.

Method Detail

getBeginning	back to summary
public String getBeginning() Getter for property 'beginning'. Returns:String Value for property 'beginning'.

getBeginning

back to summary

public String getBeginning()

Getter for property 'beginning'.

Returns:String: Value for property 'beginning'.

getEnding	back to summary
public String getEnding() Getter for property 'ending'. Returns:String Value for property 'ending'.

getEnding

back to summary

public String getEnding()

Getter for property 'ending'.

Returns:String: Value for property 'ending'.

getSeparator	back to summary
public String getSeparator() Getter for property 'separator'. Returns:String Value for property 'separator'.

getSeparator

back to summary

public String getSeparator()

Getter for property 'separator'.

Returns:String: Value for property 'separator'.

public Class DerbyConcatFunction

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private Interface DerbyConcatFunction.StringJoinTemplate

Method Summary

Method Detail

private Interface DerbyConcatFunction.StringTransformer

Method Summary

Method Detail