Package org.apache.tools.ant

Class UnknownElement

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.Task
org.apache.tools.ant.UnknownElement
All Implemented Interfaces:
Cloneable
public class UnknownElement extends Task
Wrapper class that holds all the information necessary to create a task or data type that did not exist when Ant started, or one which has had its definition updated to use a different implementation class.

  • Constructor Details

    • UnknownElement

      public UnknownElement(String elementName)
      Creates an UnknownElement for the given element name.
      Parameters:
      elementName - The name of the unknown element. Must not be null.

  • Method Details

    • getChildren

      public List<UnknownElement> getChildren()
      Returns:
      the list of nested UnknownElements for this UnknownElement.

    • getTag

      public String getTag()
      Returns the name of the XML element which generated this unknown element.
      Returns:
      the name of the XML element which generated this unknown element.

    • getNamespace

      public String getNamespace()
      Return the namespace of the XML element associated with this component.
      Returns:
      Namespace URI used in the xmlns declaration.

    • setNamespace

      public void setNamespace(String namespace)
      Set the namespace of the XML element associated with this component. This method is typically called by the XML processor. If the namespace is "ant:current", the component helper is used to get the current antlib uri.
      Parameters:
      namespace - URI used in the xmlns declaration.

    • getQName

      public String getQName()
      Return the qname of the XML element associated with this component.
      Returns:
      namespace Qname used in the element declaration.

    • setQName

      public void setQName(String qname)
      Set the namespace qname of the XML element. This method is typically called by the XML processor.
      Parameters:
      qname - the qualified name of the element

    • getWrapper

      public RuntimeConfigurable getWrapper()
      Get the RuntimeConfigurable instance for this UnknownElement, containing the configuration information.
      Overrides:
      getWrapper in class Task
      Returns:
      the configuration info.

    • maybeConfigure

      public void maybeConfigure() throws BuildException
      Creates the real object instance and child elements, then configures the attributes and text of the real object. This unknown element is then replaced with the real object in the containing target's list of children.
      Overrides:
      maybeConfigure in class Task
      Throws:
      BuildException - if the configuration fails

    • configure

      public void configure(Object realObject)
      Configure the given object from this UnknownElement
      Parameters:
      realObject - the real object this UnknownElement is representing.

    • handleOutput

      protected void handleOutput(String output)
      Handles output sent to System.out by this task or its real task.
      Overrides:
      handleOutput in class Task
      Parameters:
      output - The output to log. Should not be null.

    • handleInput

      protected int handleInput(byte[] buffer, int offset, int length) throws IOException
      Delegate to realThing if present and if it as task.
      Overrides:
      handleInput in class Task
      Parameters:
      buffer - the buffer into which data is to be read.
      offset - the offset into the buffer at which data is stored.
      length - the amount of data to read.
      Returns:
      the number of bytes read.
      Throws:
      IOException - if the data cannot be read.
      Since:
      Ant 1.6
      See Also:

    • handleFlush

      protected void handleFlush(String output)
      Handles output sent to System.out by this task or its real task.
      Overrides:
      handleFlush in class Task
      Parameters:
      output - The output to log. Should not be null.

    • handleErrorOutput

      protected void handleErrorOutput(String output)
      Handles error output sent to System.err by this task or its real task.
      Overrides:
      handleErrorOutput in class Task
      Parameters:
      output - The error output to log. Should not be null.

    • handleErrorFlush

      protected void handleErrorFlush(String output)
      Handles error output sent to System.err by this task or its real task.
      Overrides:
      handleErrorFlush in class Task
      Parameters:
      output - The error output to log. Should not be null.

    • execute

      public void execute()
      Executes the real object if it's a task. If it's not a task (e.g. a data type) then this method does nothing.
      Overrides:
      execute in class Task

    • addChild

      public void addChild(UnknownElement child)
      Adds a child element to this element.
      Parameters:
      child - The child element to add. Must not be null.

    • handleChildren

      protected void handleChildren(Object parent, RuntimeConfigurable parentWrapper) throws BuildException
      Creates child elements, creates children of the children (recursively), and sets attributes of the child elements.
      Parameters:
      parent - The configured object for the parent. Must not be null.
      parentWrapper - The wrapper containing child wrappers to be configured. Must not be null if there are any children.
      Throws:
      BuildException - if the children cannot be configured.

    • getComponentName

      protected String getComponentName()
      Returns:
      the component name - uses ProjectHelper#genComponentName()

    • applyPreSet

      public void applyPreSet(UnknownElement u)
      This is used then the realobject of the UE is a PreSetDefinition. This is also used when a presetdef is used on a presetdef The attributes, elements and text are applied to this UE.
      Parameters:
      u - an UnknownElement containing the attributes, elements and text

    • makeObject

      protected Object makeObject(UnknownElement ue, RuntimeConfigurable w)
      Creates a named task or data type. If the real object is a task, it is configured up to the init() stage.
      Parameters:
      ue - The unknown element to create the real object for. Must not be null.
      w - Ignored in this implementation.
      Returns:
      the task or data type represented by the given unknown element.

    • makeTask

      protected Task makeTask(UnknownElement ue, RuntimeConfigurable w)
      Creates a named task and configures it up to the init() stage.
      Parameters:
      ue - The UnknownElement to create the real task for. Must not be null.
      w - Ignored.
      Returns:
      the task specified by the given unknown element, or null if the task name is not recognised.

    • getNotFoundException

      protected BuildException getNotFoundException(String what, String name)
      Returns a very verbose exception for when a task/data type cannot be found.
      Parameters:
      what - The kind of thing being created. For example, when a task name could not be found, this would be "task". Should not be null.
      name - The name of the element which could not be found. Should not be null.
      Returns:
      a detailed description of what might have caused the problem.

    • getTaskName

      public String getTaskName()
      Returns the name to use in logging messages.
      Overrides:
      getTaskName in class Task
      Returns:
      the name to use in logging messages.

    • getTask

      public Task getTask()
      Returns the task instance after it has been created and if it is a task.
      Returns:
      a task instance or null if the real object is not a task.

    • getRealThing

      public Object getRealThing()
      Return the configured object
      Returns:
      the real thing whatever it is
      Since:
      ant 1.6

    • setRealThing

      public void setRealThing(Object realThing)
      Set the configured object
      Parameters:
      realThing - the configured object
      Since:
      ant 1.7

    • similar

      public boolean similar(Object obj)
      like contents equals, but ignores project
      Parameters:
      obj - the object to check against
      Returns:
      true if this UnknownElement has the same contents the other

    • copy

      public UnknownElement copy(Project newProject)
      Make a copy of the unknown element and set it in the new project.
      Parameters:
      newProject - the project to create the UE in.
      Returns:
      the copied UE.