Definer (Apache Ant API)
Date: 2016-04-09

org.apache.tools.ant.taskdefs

## Class Definer

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.Task
    - - org.apache.tools.ant.taskdefs.AntlibDefinition
      - - org.apache.tools.ant.taskdefs.DefBase
        - - org.apache.tools.ant.taskdefs.Definer

- All Implemented Interfaces:
    java.lang.Cloneable
  Direct Known Subclasses:
    Componentdef, Typedef

      public abstract class Definer
      extends DefBase

  Base class for Taskdef and Typedef - handles all the attributes for Typedef. The uri and class handling is handled by DefBase
  Since:
    Ant 1.4

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `Definer.Format` Enumerated type for format attribute
    `static class` | `Definer.OnError` Enumerated type for onError attribute

  - ### Field Summary

    - ### Fields inherited from class org.apache.tools.ant.Task

      `target, taskName, taskType, wrapper`

    - ### Fields inherited from class org.apache.tools.ant.ProjectComponent

      `description, location, project`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `Definer()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `addDefinition(java.lang.ClassLoader al, java.lang.String name, java.lang.String classname)` Add a definition using the attributes of Definer
    `void` | `execute()` Run the definition.
    `java.lang.String` | `getClassname()` Returns the classname of the object we are defining.
    `java.io.File` | `getFile()`
    `java.lang.String` | `getName()`
    `java.lang.String` | `getResource()`
    `protected void` | `loadProperties(java.lang.ClassLoader al, java.net.URL url)` Load type definitions as properties from a URL.
    `static java.lang.String` | `makeResourceFromURI(java.lang.String uri)` This is where the logic to map from a URI to an antlib resource is kept.
    `void` | `setAdapter(java.lang.String adapter)` Set the class name of the adapter class.
    `protected void` | `setAdapterClass(java.lang.Class<?> adapterClass)` Set the adapter class.
    `void` | `setAdaptTo(java.lang.String adaptTo)` Set the classname of the class that the definition must be compatible with, either directly or by use of the adapter class.
    `protected void` | `setAdaptToClass(java.lang.Class<?> adaptToClass)` Set the class for adaptToClass, to be used by derived classes, used instead of the adaptTo attribute.
    `void` | `setAntlib(java.lang.String antlib)` Antlib attribute, sets resource and uri.
    `void` | `setClassname(java.lang.String classname)` The full class name of the object being defined.
    `void` | `setFile(java.io.File file)` Name of the property file to load ant name/classname pairs from.
    `void` | `setFormat(Definer.Format format)` Sets the format of the file or resource
    `void` | `setName(java.lang.String name)` Name of the definition
    `void` | `setOnError(Definer.OnError onError)` What to do if there is an error in loading the class.
    `void` | `setResource(java.lang.String res)` Name of the property resource to load ant name/classname pairs from.
    `protected void` | `setRestrict(boolean restrict)` The restrict attribute.

    - ### Methods inherited from class org.apache.tools.ant.taskdefs.DefBase

      `createClasspath, createLoader, getClasspath, getClasspathId, getLoaderId, hasCpDelegate, init, isReverseLoader, setClasspath, setClasspathRef, setLoaderRef, setReverseLoader`

    - ### Methods inherited from class org.apache.tools.ant.taskdefs.AntlibDefinition

      `getAntlibClassLoader, getURI, setAntlibClassLoader, setURI`

    - ### Methods inherited from class org.apache.tools.ant.Task

      `bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

    - ### Methods inherited from class org.apache.tools.ant.ProjectComponent

      `clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject`

    - ### Methods inherited from class java.lang.Object

      `equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### Definer

          public Definer()

  - ### Method Detail

    - #### setRestrict

          protected void setRestrict(boolean restrict)

      The restrict attribute. If this is true, only use this definition in add(X).
      Parameters:
        `restrict` - the value to set.

    - #### setOnError

          public void setOnError(Definer.OnError onError)

      What to do if there is an error in loading the class.
      - error - throw build exception
      - report - output at warning level
      - ignore - output at debug level
      Parameters:
        `onError` - an `OnError` value

    - #### setFormat

          public void setFormat(Definer.Format format)

      Sets the format of the file or resource
      Parameters:
        `format` - the enumerated value - xml or properties

    - #### getName

          public java.lang.String getName()

      Returns:
        the name for this definition

    - #### getFile

          public java.io.File getFile()

      Returns:
        the file containing definitions

    - #### getResource

          public java.lang.String getResource()

      Returns:
        the resource containing definitions

    - #### execute

          public void execute()
                       throws BuildException

      Run the definition.
      Overrides:
        `execute` in class `Task`
      Throws:
        `BuildException` - if an error occurs

    - #### makeResourceFromURI

          public static java.lang.String makeResourceFromURI(java.lang.String uri)

      This is where the logic to map from a URI to an antlib resource is kept.
      Parameters:
        `uri` - the xml namespace uri that to convert.
      Returns:
        the name of a resource. It may not exist

    - #### loadProperties

          protected void loadProperties(java.lang.ClassLoader al,
                            java.net.URL url)

      Load type definitions as properties from a URL.
      Parameters:
        `al` - the classloader to use
        `url` - the url to get the definitions from

    - #### setFile

          public void setFile(java.io.File file)

      Name of the property file to load ant name/classname pairs from.
      Parameters:
        `file` - the file

    - #### setResource

          public void setResource(java.lang.String res)

      Name of the property resource to load ant name/classname pairs from.
      Parameters:
        `res` - the resource to use

    - #### setAntlib

          public void setAntlib(java.lang.String antlib)

      Antlib attribute, sets resource and uri. uri is set the antlib value and, resource is set to the antlib.xml resource in the classpath. For example antlib="antlib:org.acme.bland.cola" corresponds to uri="antlib:org.acme.bland.cola" resource="org/acme/bland/cola/antlib.xml". ASF Bugzilla Bug 31999
      Parameters:
        `antlib` - the value to set.

    - #### setName

          public void setName(java.lang.String name)

      Name of the definition
      Parameters:
        `name` - the name of the definition

    - #### getClassname

          public java.lang.String getClassname()

      Returns the classname of the object we are defining. May be `null`.
      Returns:
        the class name

    - #### setClassname

          public void setClassname(java.lang.String classname)

      The full class name of the object being defined. Required, unless file or resource have been specified.
      Parameters:
        `classname` - the name of the class

    - #### setAdapter

          public void setAdapter(java.lang.String adapter)

      Set the class name of the adapter class. An adapter class is used to proxy the definition class. It is used if the definition class is not assignable to the adaptto class, or if the adaptto class is not present.
      Parameters:
        `adapter` - the name of the adapter class

    - #### setAdapterClass

          protected void setAdapterClass(java.lang.Class<?> adapterClass)

      Set the adapter class.
      Parameters:
        `adapterClass` - the class to use to adapt the definition class

    - #### setAdaptTo

          public void setAdaptTo(java.lang.String adaptTo)

      Set the classname of the class that the definition must be compatible with, either directly or by use of the adapter class.
      Parameters:
        `adaptTo` - the name of the adaptto class

    - #### setAdaptToClass

          protected void setAdaptToClass(java.lang.Class<?> adaptToClass)

      Set the class for adaptToClass, to be used by derived classes, used instead of the adaptTo attribute.
      Parameters:
        `adaptToClass` - the class for adaptor.

    - #### addDefinition

          protected void addDefinition(java.lang.ClassLoader al,
                           java.lang.String name,
                           java.lang.String classname)
                                throws BuildException

      Add a definition using the attributes of Definer
      Parameters:
        `al` - the ClassLoader to use
        `name` - the name of the definition
        `classname` - the classname of the definition
      Throws:
        `BuildException` - if an error occurs