net.ontopia.topicmaps.nav2.impl.basic
Class AbstractFunction

java.lang.Object
  net.ontopia.topicmaps.nav2.impl.basic.AbstractFunction

All Implemented Interfaces:

FunctionIF

Direct Known Subclasses:

DisplayHierarchyFunction, Function, HelloWorldFunction

public abstract class AbstractFunction
extends Object
implements FunctionIF

INTERNAL: Abstract implementation of FunctionIF, which should be the superclass for customized functions.

Subclasses of this abstract function only have to implement the getParameters() and execute() methods.

Since:

1.3.4

Constructor Summary

AbstractFunction()

Method Summary

void	call(javax.servlet.jsp.PageContext pageContext, javax.servlet.jsp.tagext.TagSupport callingTag) INTERNAL: Executes this function in the specified context.
Collection	execute(javax.servlet.jsp.PageContext pageContext, javax.servlet.jsp.tagext.TagSupport callingTag) INTERNAL: Executes this function in the specified context.
ModuleIF	getModule() INTERNAL: Gets the reference to the Module this function belongs to.
String	getName() INTERNAL: Gets the name of this function.
Collection	getParameters() INTERNAL: Return the names of the parameters as an ordered Collection.
String	getReturnVariableName() INTERNAL: Gets the name of the variable to which the return value of the function should be assigned to.
JSPTreeNodeIF	getRootNode() INTERNAL: Gets the rode node of this Function.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractFunction

public AbstractFunction()

Method Detail

getParameters

public Collection getParameters()

Description copied from interface: FunctionIF

INTERNAL: Return the names of the parameters as an ordered Collection.

Specified by:

getParameters in interface FunctionIF

Returns:

Empty list

execute

public Collection execute(javax.servlet.jsp.PageContext pageContext,
                          javax.servlet.jsp.tagext.TagSupport callingTag)
                   throws IOException,
                          javax.servlet.jsp.JspException

Description copied from interface: FunctionIF

INTERNAL: Executes this function in the specified context.

Specified by:

execute in interface FunctionIF

Returns:

Collection The function return value collection. If null is returned, no value will be given to the parent value accepting tag.

Throws:

IOException

javax.servlet.jsp.JspException

call

public void call(javax.servlet.jsp.PageContext pageContext,
                 javax.servlet.jsp.tagext.TagSupport callingTag)
          throws IOException,
                 javax.servlet.jsp.JspException

Description copied from interface: FunctionIF

INTERNAL: Executes this function in the specified context.

Specified by:

call in interface FunctionIF

Throws:

IOException

javax.servlet.jsp.JspException

getName

public String getName()

Description copied from interface: FunctionIF

INTERNAL: Gets the name of this function.

Specified by:

getName in interface FunctionIF

Returns:

null

getReturnVariableName

public String getReturnVariableName()

Description copied from interface: FunctionIF

INTERNAL: Gets the name of the variable to which the return value of the function should be assigned to. Returns null if no return variable name was specified.

Specified by:

getReturnVariableName in interface FunctionIF

Returns:

null

getModule

public ModuleIF getModule()

Description copied from interface: FunctionIF

INTERNAL: Gets the reference to the Module this function belongs to.

Specified by:

getModule in interface FunctionIF

Returns:

null

getRootNode

public JSPTreeNodeIF getRootNode()

Description copied from interface: FunctionIF

INTERNAL: Gets the rode node of this Function.

Specified by:

getRootNode in interface FunctionIF

Returns:

null

toString

public String toString()

Overrides:

toString in class Object