Javah (Apache Ant API)

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org.apache.tools.ant.taskdefs.optional
Class Javah

java.lang.Object
  org.apache.tools.ant.ProjectComponent
      org.apache.tools.ant.Task
          org.apache.tools.ant.taskdefs.optional.Javah

All Implemented Interfaces:: java.lang.Cloneable

public class Javah
extends Task
extends Task

Generates JNI header files using javah. This task can take the following arguments:

classname - the fully-qualified name of a class
outputFile - Concatenates the resulting header or source files for all the classes listed into this file
destdir - Sets the directory where javah saves the header files or the stub files
classpath
bootclasspath
force - Specifies that output files should always be written (JDK1.2 only)
old - Specifies that old JDK1.0-style header files should be generated (otherwise output file contain JNI-style native method function prototypes) (JDK1.2 only)
stubs - generate C declarations from the Java object file (used with old)
verbose - causes javah to print a message to stdout concerning the status of the generated files
extdirs - Override location of installed extensions

Of these arguments, either outputFile or destdir is required, but not both. More than one classname may be specified, using a comma-separated list or by using <class name="xxx"> elements within the task.

When this task executes, it will generate C header and source files that are needed to implement native methods.

Nested Class Summary
`class`	`Javah.ClassArgument` A class corresponding the the nested "class" element.

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
`Javah()` No arg constructor.

Method Summary
`ImplementationSpecificArgument`	`createArg()` Adds an implementation specific command-line argument.
`Path`	`createBootclasspath()` Adds path to bootstrap class files.
`Javah.ClassArgument`	`createClass()` Adds class to process.
`Path`	`createClasspath()` Path to use for classpath.
`void`	`execute()` Execute the task
`Path`	`getBootclasspath()` The bootclasspath to use.
`java.lang.String[]`	`getClasses()` Names of the classes to process.
`Path`	`getClasspath()` The classpath to use.
`java.lang.String[]`	`getCurrentArgs()` Returns the (implementation specific) settings given as nested arg elements.
`java.io.File`	`getDestdir()` The destination directory, if any.
`boolean`	`getForce()` Whether output files should always be written.
`boolean`	`getOld()` Whether old JDK1.0-style header files should be generated.
`java.io.File`	`getOutputfile()` The destination file, if any.
`boolean`	`getStubs()` Whether C declarations from the Java object file should be generated.
`boolean`	`getVerbose()` Whether verbose output should get generated.
`void`	`logAndAddFiles(Commandline cmd)` Logs the compilation parameters, adds the files to compile and logs the "niceSourceList"
`protected void`	`logAndAddFilesToCompile(Commandline cmd)` Logs the compilation parameters, adds the files to compile and logs the "niceSourceList"
`void`	`setBootclasspath(Path src)` location of bootstrap class files.
`void`	`setBootClasspathRef(Reference r)` To the bootstrap path, this adds a reference to a classpath defined elsewhere.
`void`	`setClass(java.lang.String cls)` the fully-qualified name of the class (or classes, separated by commas).
`void`	`setClasspath(Path src)` the classpath to use.
`void`	`setClasspathRef(Reference r)` Adds a reference to a classpath defined elsewhere.
`void`	`setDestdir(java.io.File destDir)` Set the destination directory into which the Java source files should be compiled.
`void`	`setForce(boolean force)` If true, output files should always be written (JDK1.2 only).
`void`	`setImplementation(java.lang.String impl)` Choose the implementation for this particular task.
`void`	`setOld(boolean old)` If true, specifies that old JDK1.0-style header files should be generated.
`void`	`setOutputFile(java.io.File outputFile)` Concatenates the resulting header or source files for all the classes listed into this file.
`void`	`setStubs(boolean stubs)` If true, generate C declarations from the Java object file (used with old).
`void`	`setVerbose(boolean verbose)` If true, causes Javah to print a message concerning the status of the generated files.

Methods inherited from class org.apache.tools.ant.Task
`bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, 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

Javah

public Javah()

No arg constructor.

Method Detail

setClass

public void setClass(java.lang.String cls)

the fully-qualified name of the class (or classes, separated by commas).

Parameters:: cls - the classname (or classnames).

createClass

public Javah.ClassArgument createClass()

Adds class to process.

Returns:: a ClassArgument to be configured.

getClasses

public java.lang.String[] getClasses()

Names of the classes to process.

Returns:: the array of classes.
Since:: Ant 1.6.3

setDestdir

public void setDestdir(java.io.File destDir)

Set the destination directory into which the Java source files should be compiled.

Parameters:: destDir - the destination directory.

getDestdir

public java.io.File getDestdir()

The destination directory, if any.

Returns:: the destination directory.
Since:: Ant 1.6.3

setClasspath

public void setClasspath(Path src)

the classpath to use.

Parameters:: src - the classpath.

createClasspath

public Path createClasspath()

Path to use for classpath.

Returns:: a path to be configured.

setClasspathRef

public void setClasspathRef(Reference r)

Adds a reference to a classpath defined elsewhere.

Parameters:: r - a reference to a classpath.
To do:: this needs to be documented in the HTML docs.

getClasspath

public Path getClasspath()

The classpath to use.

Returns:: the classpath.
Since:: Ant 1.6.3

setBootclasspath

public void setBootclasspath(Path src)

location of bootstrap class files.

Parameters:: src - the bootstrap classpath.

createBootclasspath

public Path createBootclasspath()

Adds path to bootstrap class files.

Returns:: a path to be configured.

setBootClasspathRef

public void setBootClasspathRef(Reference r)

To the bootstrap path, this adds a reference to a classpath defined elsewhere.

Parameters:: r - a reference to a classpath
To do:: this needs to be documented in the HTML.

getBootclasspath

public Path getBootclasspath()

The bootclasspath to use.

Returns:: the bootclass path.
Since:: Ant 1.6.3

setOutputFile

public void setOutputFile(java.io.File outputFile)

Concatenates the resulting header or source files for all the classes listed into this file.

Parameters:: outputFile - the output file.

getOutputfile

public java.io.File getOutputfile()

The destination file, if any.

Returns:: the destination file.
Since:: Ant 1.6.3

setForce

public void setForce(boolean force)

If true, output files should always be written (JDK1.2 only).

Parameters:: force - the value to use.

getForce

public boolean getForce()

Whether output files should always be written.

Returns:: the force attribute.
Since:: Ant 1.6.3

setOld

public void setOld(boolean old)

If true, specifies that old JDK1.0-style header files should be generated. (otherwise output file contain JNI-style native method function prototypes) (JDK1.2 only).

Parameters:: old - if true use old 1.0 style header files.

getOld

public boolean getOld()

Whether old JDK1.0-style header files should be generated.

Returns:: the old attribute.
Since:: Ant 1.6.3

setStubs

public void setStubs(boolean stubs)

If true, generate C declarations from the Java object file (used with old).

Parameters:: stubs - if true, generated C declarations.

getStubs

public boolean getStubs()

Whether C declarations from the Java object file should be generated.

Returns:: the stubs attribute.
Since:: Ant 1.6.3

setVerbose

public void setVerbose(boolean verbose)

If true, causes Javah to print a message concerning the status of the generated files.

Parameters:: verbose - if true, do verbose printing.

getVerbose

public boolean getVerbose()

Whether verbose output should get generated.

Returns:: the verbose attribute.
Since:: Ant 1.6.3

setImplementation

public void setImplementation(java.lang.String impl)

Choose the implementation for this particular task.

Parameters:: impl - the name of the implemenation.
Since:: Ant 1.6.3

createArg

public ImplementationSpecificArgument createArg()

Adds an implementation specific command-line argument.

Returns:: a ImplementationSpecificArgument to be configured.
Since:: Ant 1.6.3

getCurrentArgs

public java.lang.String[] getCurrentArgs()

Returns the (implementation specific) settings given as nested arg elements.

Returns:: the arguments.
Since:: Ant 1.6.3

execute

public void execute()
             throws BuildException

Execute the task

Overrides:: execute in class Task

Throws:: BuildException - is there is a problem in the task execution.

logAndAddFiles

public void logAndAddFiles(Commandline cmd)

Logs the compilation parameters, adds the files to compile and logs the "niceSourceList"

Parameters:: cmd - the command line.

logAndAddFilesToCompile

protected void logAndAddFilesToCompile(Commandline cmd)