Package org.h2.schema

Class FunctionAlias

java.lang.Object

org.h2.engine.DbObject

org.h2.schema.SchemaObject

org.h2.schema.UserDefinedFunction

org.h2.schema.FunctionAlias

All Implemented Interfaces:

HasSQL

public final class FunctionAlias
extends UserDefinedFunction

Represents a user-defined function, or alias.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FunctionAlias.JavaMethod	There may be multiple Java methods that match a function name.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	deterministic
private FunctionAlias.JavaMethod[]	javaMethods
private java.lang.String	methodName
private java.lang.String	source

Fields inherited from class org.h2.schema.UserDefinedFunction

className

Fields inherited from class org.h2.engine.DbObject

AGGREGATE, comment, COMMENT, CONSTANT, CONSTRAINT, database, DOMAIN, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, SYNONYM, TABLE_OR_VIEW, trace, TRIGGER, USER

Fields inherited from interface org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

Constructor Summary

Constructors

Modifier	Constructor	Description
private	FunctionAlias(Schema schema, int id, java.lang.String name)

Method Summary

Modifier and Type	Method	Description
FunctionAlias.JavaMethod	findJavaMethod(Expression[] args)	Find the Java method that matches the arguments.
java.lang.String	getCreateSQL()	Construct the CREATE ...
java.lang.String	getDropSQL()	Construct a DROP ...
java.lang.String	getJavaMethodName()
FunctionAlias.JavaMethod[]	getJavaMethods()	Get the Java methods mapped by this function.
private static java.lang.String	getMethodSignature(java.lang.reflect.Method m)
java.lang.String	getSource()
int	getType()	Get the object type.
private void	init(boolean force)
boolean	isDeterministic()
private void	load()
private void	loadClass()
private void	loadFromSource()
static FunctionAlias	newInstance(Schema schema, int id, java.lang.String name, java.lang.String javaClassMethod, boolean force)	Create a new alias based on a method name.
static FunctionAlias	newInstanceFromSource(Schema schema, int id, java.lang.String name, java.lang.String source, boolean force)	Create a new alias based on source code.
void	removeChildrenAndResources(SessionLocal session)	Delete all dependent children objects and resources of this object.
void	setDeterministic(boolean deterministic)

Methods inherited from class org.h2.schema.UserDefinedFunction

checkRename, getCreateSQLForCopy, getJavaClassName

Methods inherited from class org.h2.schema.SchemaObject

getSchema, getSQL, getSQL, isHidden

Methods inherited from class org.h2.engine.DbObject

getChildren, getComment, getCreateSQLForMeta, getDatabase, getId, getModificationId, getName, invalidate, isTemporary, isValid, rename, setComment, setModified, setObjectName, setTemporary, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Field Detail

methodName

private java.lang.String methodName

source

private java.lang.String source

javaMethods

private FunctionAlias.JavaMethod[] javaMethods

deterministic

private boolean deterministic

Constructor Detail

FunctionAlias

private FunctionAlias(Schema schema,
                      int id,
                      java.lang.String name)

Method Detail

newInstance

public static FunctionAlias newInstance(Schema schema,
                                        int id,
                                        java.lang.String name,
                                        java.lang.String javaClassMethod,
                                        boolean force)

Create a new alias based on a method name.

Parameters:

schema - the schema

id - the id

name - the name

javaClassMethod - the class and method name

force - create the object even if the class or method does not exist

Returns:

the database object

newInstanceFromSource

public static FunctionAlias newInstanceFromSource(Schema schema,
                                                  int id,
                                                  java.lang.String name,
                                                  java.lang.String source,
                                                  boolean force)

Create a new alias based on source code.

Parameters:

schema - the schema

id - the id

name - the name

source - the source code

force - create the object even if the class or method does not exist

Returns:

the database object

init

private void init(boolean force)

load

private void load()

loadFromSource

private void loadFromSource()

loadClass

private void loadClass()

getMethodSignature

private static java.lang.String getMethodSignature(java.lang.reflect.Method m)

getDropSQL

public java.lang.String getDropSQL()

Description copied from class: DbObject

Construct a DROP ... SQL statement for this object.

Overrides:

getDropSQL in class DbObject

Returns:

the SQL statement

getCreateSQL

public java.lang.String getCreateSQL()

Description copied from class: DbObject

Construct the CREATE ... SQL statement for this object.

Specified by:

getCreateSQL in class DbObject

Returns:

the SQL statement

getType

public int getType()

Description copied from class: DbObject

Get the object type.

Specified by:

getType in class DbObject

Returns:

the object type

removeChildrenAndResources

public void removeChildrenAndResources(SessionLocal session)

Description copied from class: DbObject

Delete all dependent children objects and resources of this object.

Specified by:

removeChildrenAndResources in class DbObject

Parameters:

session - the session

findJavaMethod

public FunctionAlias.JavaMethod findJavaMethod(Expression[] args)

Find the Java method that matches the arguments.

Parameters:

args - the argument list

Returns:

the Java method

Throws:

DbException - if no matching method could be found

getJavaMethodName

public java.lang.String getJavaMethodName()

getJavaMethods

public FunctionAlias.JavaMethod[] getJavaMethods()

Get the Java methods mapped by this function.

Returns:

the Java methods.

setDeterministic

public void setDeterministic(boolean deterministic)

isDeterministic

public boolean isDeterministic()

getSource

public java.lang.String getSource()