org.pentaho.reporting.libraries.repository.file
Class FileContentItem

java.lang.Object
  org.pentaho.reporting.libraries.repository.file.FileContentEntity
      org.pentaho.reporting.libraries.repository.file.FileContentItem

All Implemented Interfaces:

Serializable, ContentEntity, ContentItem

public class FileContentItem
extends FileContentEntity
implements ContentItem

A content item wrapping a file.

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

FileContentItem(ContentLocation parent, File backend)
Creates a new file based content item for the given file and parent location.

Method Summary

InputStream	getInputStream() Tries to open and return a input stream for reading from the content item.
String	getMimeType() Returns the mime type for the content entity.
OutputStream	getOutputStream() Tries to open and return a output stream for writing into the content item.
boolean	isReadable() Checks, whether the content item is readable.
boolean	isWriteable() Checks, whether the content item is writable.

Methods inherited from class org.pentaho.reporting.libraries.repository.file.FileContentEntity

delete, getAttribute, getContentId, getName, getParent, getRepository, setAttribute

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.pentaho.reporting.libraries.repository.ContentEntity

delete, getAttribute, getContentId, getName, getParent, getRepository, setAttribute

Constructor Detail

FileContentItem

public FileContentItem(ContentLocation parent,
                       File backend)

Creates a new file based content item for the given file and parent location.

Parameters:

parent - the parent.

backend - the backend.

Method Detail

getMimeType

public String getMimeType()
                   throws ContentIOException

Description copied from interface: ContentItem

Returns the mime type for the content entity. If the repository does not store mimetypes, this call usually uses the repositories MimeRegistry to resolve the mimetype.

Specified by:

getMimeType in interface ContentItem

Returns:

the mime type.

Throws:

ContentIOException - if an error occured.

getOutputStream

public OutputStream getOutputStream()
                             throws ContentIOException,
                                    IOException

Description copied from interface: ContentItem

Tries to open and return a output stream for writing into the content item. This call will fail if the item is not writeable. Whether opening multiple output streams at the same time is possible is implementation dependent, but it is generally not recommended to try this.

Having both an input and output stream open at the same time is not guaranteed to work. Generally if you need to append data, first open the inputstream and copy the content to a temporary location and then write the content along with the appended content to the new output stream.

Specified by:

getOutputStream in interface ContentItem

Returns:

the output stream for writing the item.

Throws:

ContentIOException - if an repository related error prevents the creation of the output stream.

IOException - if an IO error occurs.

getInputStream

public InputStream getInputStream()
                           throws ContentIOException,
                                  IOException

Description copied from interface: ContentItem

Tries to open and return a input stream for reading from the content item. This call will fail if the item is not readable. Whether opening multiple input streams at the same time is possible is implementation dependent.

Having both an input and output stream open at the same time is not guaranteed to work. Generally if you need to append data, first open the inputstream and copy the content to a temporary location and then write the content along with the appended content to the new output stream.

Specified by:

getInputStream in interface ContentItem

Returns:

the input stream for reading from the item.

Throws:

ContentIOException - if an repository related error prevents the creation of the input stream.

IOException - if an IO error occurs.

isReadable

public boolean isReadable()

Description copied from interface: ContentItem

Checks, whether the content item is readable. A content item that is not readable will never return a valid inputstream and any call to getInputStream is bound to fail.

Specified by:

isReadable in interface ContentItem

Returns:

true, if the content item is readable, false otherwise.

isWriteable

public boolean isWriteable()

Description copied from interface: ContentItem

Checks, whether the content item is writable. A content item that is not writable will never return a valid outputstream and any call to getOutputStream is bound to fail.

Specified by:

isWriteable in interface ContentItem

Returns:

true, if the content item is writeable, false otherwise.