de.intarsys.tools.locator

Class LocatorViewport

java.lang.Object

de.intarsys.tools.locator.CommonLocator

de.intarsys.tools.locator.LocatorViewport

All Implemented Interfaces:

IAdapterSupport, ISynchronizable, ILocator

public class LocatorViewport
extends CommonLocator
implements IAdapterSupport

A viewport implementation for ILocator. This object defines a range of bytes visible to the client of the viewport.

Constructor Summary

Constructors

Constructor and Description
LocatorViewport(ILocator delegate)

Method Summary

Modifier and Type	Method and Description
void	delete() Delete the artifact referenced by this.
boolean	exists() Answer true if the location designated by this exists.
<T> T	getAdapter(java.lang.Class<T> clazz) Return an object of type clazz that represents the receiver.
ILocator	getChild(java.lang.String name) The locator for the resource name within the context of this.
ILocator	getDelegate()
long	getEnd()
java.lang.String	getFullName() The full physical name of this.
java.io.InputStream	getInputStream() Return an InputStream on the data represented by the receiver.
long	getLength() Returns the length of this data container or -1 if unknown
java.lang.String	getLocalName() The local name of the receiver within its parent.
java.lang.String	getName()
java.io.OutputStream	getOutputStream() Return an OutputStream on the location represented by the receiver.
ILocator	getParent() The ILocator that is one hierarchy level up or null.
IRandomAccess	getRandomAccess() The IRandomAccess for this.
java.io.Reader	getReader() A Reader on the data represented by the receiver.
java.io.Reader	getReader(java.lang.String encoding) A Reader on the data represented by the receiver for the given encoding.
long	getStart()
java.lang.String	getType() The type of the resource.
java.lang.String	getTypedName() The qualified local name of the receiver within its parent that includes the type specification for the destination if appropriate.
java.io.Writer	getWriter() A Writer on the location represented by the receiver.
java.io.Writer	getWriter(java.lang.String encoding) A Writer on the location represented by the receiver for the given encoding.
boolean	isDirectory() Answer true if the location designated by this is a directory.
boolean	isOutOfSynch() true if the component is out of synch.
boolean	isReadOnly() true if the specified resource is read only.
ILocator[]	listLocators(ILocatorNameFilter filter) Return an array of ILocator that are children of the receiver that conform to filter.
void	rename(java.lang.String newName) Rename the complete physical name to newName.
protected void	setDelegate(ILocator delegate)
void	setEnd(long end)
void	setName(java.lang.String name)
void	setStart(long start)
void	synch() Perform a synchronization with the components physical resources.
java.net.URL	toURL() The location designated by this as an URL.

Methods inherited from class de.intarsys.tools.locator.CommonLocator

createTempFileLocator, setReadOnly

Methods inherited from class java.lang.Object

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

Constructor Detail

LocatorViewport

public LocatorViewport(ILocator delegate)

Method Detail

delete

public void delete()
            throws java.io.IOException

Description copied from interface: ILocator

Delete the artifact referenced by this.

Specified by:

delete in interface ILocator

Overrides:

delete in class CommonLocator

Throws:

java.io.IOException

exists

public boolean exists()

Description copied from interface: ILocator

Answer true if the location designated by this exists.

Specified by:

exists in interface ILocator

Returns:

Answer true if the location designated by this exists.

getAdapter

public <T> T getAdapter(java.lang.Class<T> clazz)

Description copied from interface: IAdapterSupport

Return an object of type clazz that represents the receiver.

This method should return null if adaption is not possible.

Specified by:

getAdapter in interface IAdapterSupport

Returns:

Return an object of type clazz that represents the receiver.

getChild

public ILocator getChild(java.lang.String name)

Description copied from interface: ILocator

The locator for the resource name within the context of this. This may for example be an ILocator to a file within a directory.

Specified by:

getChild in interface ILocator

Parameters:

name - The name of the resource to be located.

Returns:

The ILocator for the resource with the name "name" within the context of this.

getDelegate

public ILocator getDelegate()

getEnd

public long getEnd()

getFullName

public java.lang.String getFullName()

Description copied from interface: ILocator

The full physical name of this.

This method returns a representation that is proprietary to the underlying physical representation, for example a file name, a SQL statement or so on.

Specified by:

getFullName in interface ILocator

Returns:

The full physical name of the receiver.

getInputStream

public java.io.InputStream getInputStream()
                                   throws java.io.IOException

Description copied from interface: ILocator

Return an InputStream on the data represented by the receiver.

Specified by:

getInputStream in interface ILocator

Returns:

An InputStream on the data represented by the receiver.

Throws:

java.io.IOException

getLength

public long getLength()

Description copied from interface: ILocator

Returns the length of this data container or -1 if unknown

Specified by:

getLength in interface ILocator

Overrides:

getLength in class CommonLocator

Returns:

the length of this data container, measured in bytes.

getLocalName

public java.lang.String getLocalName()

Description copied from interface: ILocator

The local name of the receiver within its parent.

Specified by:

getLocalName in interface ILocator

Returns:

The local name of the receiver within its parent.

getName

public java.lang.String getName()

getOutputStream

public java.io.OutputStream getOutputStream()
                                     throws java.io.IOException

Description copied from interface: ILocator

Return an OutputStream on the location represented by the receiver.

Specified by:

getOutputStream in interface ILocator

Returns:

An OutputStream on the location represented by the receiver.

Throws:

java.io.IOException

getParent

public ILocator getParent()

Description copied from interface: ILocator

The ILocator that is one hierarchy level up or null. This may be for example the directory where the currently designated resource is found.

Specified by:

getParent in interface ILocator

Returns:

The ILocatorthat is one hierarchy level up or null.

getRandomAccess

public IRandomAccess getRandomAccess()
                              throws java.io.IOException

Description copied from interface: ILocator

The IRandomAccess for this.

Specified by:

getRandomAccess in interface ILocator

Returns:

The IRandomAccess for this.

Throws:

java.io.IOException

getReader

public java.io.Reader getReader()
                         throws java.io.IOException

Description copied from interface: ILocator

A Reader on the data represented by the receiver.

Specified by:

getReader in interface ILocator

Returns:

A Reader on the data represented by the receiver.

Throws:

java.io.IOException

getReader

public java.io.Reader getReader(java.lang.String encoding)
                         throws java.io.IOException

Description copied from interface: ILocator

A Reader on the data represented by the receiver for the given encoding.

Specified by:

getReader in interface ILocator

Parameters:

encoding - The encoding.

Returns:

A Reader on the data represented by the receiver for the given encoding.

Throws:

java.io.IOException

getStart

public long getStart()

getType

public java.lang.String getType()

Description copied from interface: ILocator

The type of the resource. This may be for example a mime type or the file extension of the underlying file.

Specified by:

getType in interface ILocator

Returns:

The type of the resource

getTypedName

public java.lang.String getTypedName()

Description copied from interface: ILocator

The qualified local name of the receiver within its parent that includes the type specification for the destination if appropriate. This is for example a filename with its correct suffix. Some locator may return the same name as "getLocalName".

Specified by:

getTypedName in interface ILocator

Returns:

The qualified local name of the receiver within its parent that includes the type specification for the destination if appropriate.

getWriter

public java.io.Writer getWriter()
                         throws java.io.IOException

Description copied from interface: ILocator

A Writer on the location represented by the receiver.

Specified by:

getWriter in interface ILocator

Returns:

A Writer on the location represented by the receiver.

Throws:

java.io.IOException

getWriter

public java.io.Writer getWriter(java.lang.String encoding)
                         throws java.io.IOException

Description copied from interface: ILocator

A Writer on the location represented by the receiver for the given encoding.

Specified by:

getWriter in interface ILocator

Parameters:

encoding - The encoding.

Returns:

A Writer on the location represented by the receiver for the given encoding.

Throws:

java.io.IOException

isDirectory

public boolean isDirectory()

Description copied from interface: ILocator

Answer true if the location designated by this is a directory. A directory location serves as a container for other resources, you can never getInputStream on this.

Specified by:

isDirectory in interface ILocator

Returns:

Answer true if the location designated by this is a directory.

isOutOfSynch

public boolean isOutOfSynch()

Description copied from interface: ISynchronizable

true if the component is out of synch.

Specified by:

isOutOfSynch in interface ISynchronizable

Returns:

true if the component is out of synch.

isReadOnly

public boolean isReadOnly()

Description copied from interface: ILocator

true if the specified resource is read only.

Specified by:

isReadOnly in interface ILocator

Overrides:

isReadOnly in class CommonLocator

Returns:

true if the specified resource is read only.

listLocators

public ILocator[] listLocators(ILocatorNameFilter filter)
                        throws java.io.IOException

Description copied from interface: ILocator

Return an array of ILocator that are children of the receiver that conform to filter. This method never returns null.

Specified by:

listLocators in interface ILocator

Parameters:

filter - The filter used to examine the child resources.

Returns:

An array of ILocator objects that conform to the filter argument.

Throws:

java.io.IOException

rename

public void rename(java.lang.String newName)
            throws java.io.IOException

Description copied from interface: ILocator

Rename the complete physical name to newName.

Specified by:

rename in interface ILocator

Overrides:

rename in class CommonLocator

Parameters:

newName - The new name of the ILocator. The new name is expected to contain both local and type part of the name.

Throws:

java.io.IOException

setDelegate

protected void setDelegate(ILocator delegate)

setEnd

public void setEnd(long end)

setName

public void setName(java.lang.String name)

setStart

public void setStart(long start)

synch

public void synch()

Description copied from interface: ISynchronizable

Perform a synchronization with the components physical resources.

In case of a scheduled synchronization this may be called by an external daemon.

Specified by:

synch in interface ISynchronizable

toURL

public java.net.URL toURL()

Description copied from interface: ILocator

The location designated by this as an URL.

Specified by:

toURL in interface ILocator

Returns:

The location designated by this as an URL.