SimpleJavaFileObject (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Standard Ed. 6

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javax.tools
Class SimpleJavaFileObject

java.lang.Object
  javax.tools.SimpleJavaFileObject

All Implemented Interfaces:: FileObject, JavaFileObject

public class SimpleJavaFileObject
extends Object
implements JavaFileObject
extends Object
implements JavaFileObject

Provides simple implementations for most methods in JavaFileObject. This class is designed to be subclassed and used as a basis for JavaFileObject implementations. Subclasses can override the implementation and specification of any method of this class as long as the general contract of JavaFileObject is obeyed.

Since:: 1.6

Nested Class Summary

Nested classes/interfaces inherited from interface javax.tools.JavaFileObject

JavaFileObject.Kind

Field Summary

protected JavaFileObject.Kind kind
          The kind of this file object.

protected URI uri
          A URI for this file object.

Constructor Summary

protected SimpleJavaFileObject(URI uri, JavaFileObject.Kind kind)
          Construct a SimpleJavaFileObject of the given kind and with the given URI.

Method Summary

boolean delete()
          This implementation does nothing.

Modifier getAccessLevel()
          This implementation returns null.

CharSequence getCharContent(boolean ignoreEncodingErrors)
          This implementation always throws UnsupportedOperationException.

JavaFileObject.Kind getKind()
          Gets the kind of this file object.

long getLastModified()
          This implementation returns 0L.

String getName()
          Gets a user-friendly name for this file object.

NestingKind getNestingKind()
          This implementation returns null.

boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind)
          This implementation compares the path of its URI to the given simple name.

InputStream openInputStream()
          This implementation always throws UnsupportedOperationException.

OutputStream openOutputStream()
          This implementation always throws UnsupportedOperationException.

Reader openReader(boolean ignoreEncodingErrors)
          Wraps the result of getCharContent(boolean) in a Reader.

Writer openWriter()
          Wraps the result of openOutputStream in a Writer.

String toString()
          Returns a string representation of the object.

URI toUri()
          Returns a URI identifying this file object.

Methods inherited from class java.lang.Object

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

Nested classes/interfaces inherited from interface javax.tools.JavaFileObject
`JavaFileObject.Kind`

Field Summary
`protected JavaFileObject.Kind`	`kind` The kind of this file object.
`protected URI`	`uri` A URI for this file object.

Constructor Summary
`protected`	`SimpleJavaFileObject(URI uri, JavaFileObject.Kind kind)` Construct a SimpleJavaFileObject of the given kind and with the given URI.

Method Summary
`boolean`	`delete()` This implementation does nothing.
`Modifier`	`getAccessLevel()` This implementation returns `null`.
`CharSequence`	`getCharContent(boolean ignoreEncodingErrors)` This implementation always throws UnsupportedOperationException.
`JavaFileObject.Kind`	`getKind()` Gets the kind of this file object.
`long`	`getLastModified()` This implementation returns `0L`.
`String`	`getName()` Gets a user-friendly name for this file object.
`NestingKind`	`getNestingKind()` This implementation returns `null`.
`boolean`	`isNameCompatible(String simpleName, JavaFileObject.Kind kind)` This implementation compares the path of its URI to the given simple name.
`InputStream`	`openInputStream()` This implementation always throws UnsupportedOperationException.
`OutputStream`	`openOutputStream()` This implementation always throws UnsupportedOperationException.
`Reader`	`openReader(boolean ignoreEncodingErrors)` Wraps the result of getCharContent(boolean) in a Reader.
`Writer`	`openWriter()` Wraps the result of openOutputStream in a Writer.
`String`	`toString()` Returns a string representation of the object.
`URI`	`toUri()` Returns a URI identifying this file object.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

uri

protected final URI uri

A URI for this file object.

kind

protected final JavaFileObject.Kind kind

The kind of this file object.

Constructor Detail

SimpleJavaFileObject

protected SimpleJavaFileObject(URI uri,
                               JavaFileObject.Kind kind)

Construct a SimpleJavaFileObject of the given kind and with the given URI.

Parameters:: uri - the URI for this file object; kind - the kind of this file object

Method Detail

toUri

public URI toUri()

Description copied from interface: FileObject

Returns a URI identifying this file object.

Specified by:: toUri in interface FileObject

Returns:: a URI

getName

public String getName()

Description copied from interface: FileObject

Gets a user-friendly name for this file object. The exact value returned is not specified but implementations should take care to preserve names as given by the user. For example, if the user writes the filename "BobsApp\Test.java" on the command line, this method should return "BobsApp\Test.java" whereas the toUri method might return file:///C:/Documents%20and%20Settings/UncleBob/BobsApp/Test.java.

Specified by:: getName in interface FileObject

Returns:: a user-friendly name

openInputStream

public InputStream openInputStream()
                            throws IOException

This implementation always throws UnsupportedOperationException. Subclasses can change this behavior as long as the contract of FileObject is obeyed.

Specified by:: openInputStream in interface FileObject

Returns:: an InputStream
Throws:: IOException - if an I/O error occurred

openOutputStream

public OutputStream openOutputStream()
                              throws IOException

This implementation always throws UnsupportedOperationException. Subclasses can change this behavior as long as the contract of FileObject is obeyed.

Specified by:: openOutputStream in interface FileObject

Returns:: an OutputStream
Throws:: IOException - if an I/O error occurred

openReader

public Reader openReader(boolean ignoreEncodingErrors)
                  throws IOException

Wraps the result of getCharContent(boolean) in a Reader. Subclasses can change this behavior as long as the contract of FileObject is obeyed.

Specified by:: openReader in interface FileObject

Parameters:: ignoreEncodingErrors - ignore encoding errors if true
Returns:: a Reader wrapping the result of getCharContent
Throws:: IllegalStateException - if this file object was opened for writing and does not support reading; UnsupportedOperationException - if this kind of file object does not support character access; IOException - if an I/O error occurred

getCharContent

public CharSequence getCharContent(boolean ignoreEncodingErrors)
                            throws IOException

This implementation always throws UnsupportedOperationException. Subclasses can change this behavior as long as the contract of FileObject is obeyed.

Specified by:: getCharContent in interface FileObject

Parameters:: ignoreEncodingErrors - ignore encoding errors if true
Returns:: a CharSequence if available; null otherwise
Throws:: IOException - if an I/O error occurred

openWriter

public Writer openWriter()
                  throws IOException

Wraps the result of openOutputStream in a Writer. Subclasses can change this behavior as long as the contract of FileObject is obeyed.

Specified by:: openWriter in interface FileObject

Returns:: a Writer wrapping the result of openOutputStream
Throws:: IllegalStateException - if this file object was opened for reading and does not support writing; UnsupportedOperationException - if this kind of file object does not support character access; IOException - if an I/O error occurred

getLastModified

public long getLastModified()

This implementation returns 0L. Subclasses can change this behavior as long as the contract of FileObject is obeyed.

Specified by:: getLastModified in interface FileObject

Returns:: 0L

delete

public boolean delete()

This implementation does nothing. Subclasses can change this behavior as long as the contract of FileObject is obeyed.

Specified by:: delete in interface FileObject

Returns:: false

getKind

public JavaFileObject.Kind getKind()

Description copied from interface: JavaFileObject

Gets the kind of this file object.

Specified by:: getKind in interface JavaFileObject

Returns:: this.kind

isNameCompatible

public boolean isNameCompatible(String simpleName,
                                JavaFileObject.Kind kind)

This implementation compares the path of its URI to the given simple name. This method returns true if the given kind is equal to the kind of this object, and if the path is equal to simpleName + kind.extension or if it ends with "/" + simpleName + kind.extension.

This method calls getKind() and toUri() and does not access the fields uri and kind directly.

Subclasses can change this behavior as long as the contract of JavaFileObject is obeyed.

Specified by:: isNameCompatible in interface JavaFileObject

Parameters:: simpleName - a simple name of a class; kind - a kind
Returns:: true if this file object is compatible; false otherwise

getNestingKind

public NestingKind getNestingKind()

This implementation returns null. Subclasses can change this behavior as long as the contract of JavaFileObject is obeyed.

Specified by:: getNestingKind in interface JavaFileObject

Returns:: the nesting kind, or null if the nesting kind is not known

getAccessLevel

public Modifier getAccessLevel()

This implementation returns null. Subclasses can change this behavior as long as the contract of JavaFileObject is obeyed.

Specified by:: getAccessLevel in interface JavaFileObject

Returns:: the access level

toString

public String toString()

Description copied from class: Object

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Overrides:: toString in class Object

Returns:: a string representation of the object.

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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

SimpleJavaFileObject (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

javax.tools Class SimpleJavaFileObject

uri

kind

SimpleJavaFileObject

toUri

getName

openInputStream

openOutputStream

openReader

getCharContent

openWriter

getLastModified

delete

getKind

isNameCompatible

getNestingKind

getAccessLevel

toString

javax.tools
Class SimpleJavaFileObject