gov.nasa.worldwind.cache
Class BasicDataFileStore.PostProcessor

java.lang.Object
  gov.nasa.worldwind.retrieve.AbstractRetrievalPostProcessor
      gov.nasa.worldwind.cache.BasicDataFileStore.PostProcessor

All Implemented Interfaces:

RetrievalPostProcessor

Enclosing class:

BasicDataFileStore

protected class BasicDataFileStore.PostProcessor
extends AbstractRetrievalPostProcessor

Field Summary

protected String	address
protected URL	localFileUrl
protected File	outputFile
protected URL	retrievalUrl
protected boolean	saveInLocalCache

Fields inherited from class gov.nasa.worldwind.retrieve.AbstractRetrievalPostProcessor

avList, retriever

Constructor Summary

BasicDataFileStore.PostProcessor(String address, URL url, boolean saveInLocalCache)

Method Summary

protected File	doGetOutputFile() Abstract method that subclasses must provide to identify the output file for the post-processor's retrieval content.
protected ByteBuffer	handleSuccessfulRetrieval() Process the retrieved data if it has been retrieved successfully.
protected ByteBuffer	handleTextContent() Handles Text content.
protected File	makeOutputFile()
protected void	markResourceAbsent() Marks the retrieval target absent.
protected boolean	overwriteExistingFile() Indicates whether the retrieved data should be written to the output file if a file of the same name already exists.
protected boolean	saveBuffer() Saves the retrieved and possibly transformed data.

Methods inherited from class gov.nasa.worldwind.retrieve.AbstractRetrievalPostProcessor

convertToDDS, getFileLock, getOutputFile, getRetriever, handleApplicationContent, handleContent, handleContentException, handleHTMLContent, handleImageContent, handleInvalidResponseCode, handleUnknownContentType, handleUnsuccessfulRetrieval, handleWMSExceptionContent, handleXMLContent, handleZipContent, isDeleteOnExit, isPrimaryContentType, isWMSException, logTextBuffer, run, saveBuffer, saveDDS, transformPixels, validateHTTPResponseCode, validateJarResponseCode, validateResponseCode

Methods inherited from class java.lang.Object

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

Field Detail

address

protected String address

localFileUrl

protected URL localFileUrl

outputFile

protected File outputFile

retrievalUrl

protected URL retrievalUrl

saveInLocalCache

protected boolean saveInLocalCache

Constructor Detail

BasicDataFileStore.PostProcessor

public BasicDataFileStore.PostProcessor(String address,
                                        URL url,
                                        boolean saveInLocalCache)

Method Detail

doGetOutputFile

protected File doGetOutputFile()

Description copied from class: AbstractRetrievalPostProcessor

Abstract method that subclasses must provide to identify the output file for the post-processor's retrieval content.

Specified by:

doGetOutputFile in class AbstractRetrievalPostProcessor

Returns:

the output file.

handleSuccessfulRetrieval

protected ByteBuffer handleSuccessfulRetrieval()

Description copied from class: AbstractRetrievalPostProcessor

Process the retrieved data if it has been retrieved successfully.

Overrides:

handleSuccessfulRetrieval in class AbstractRetrievalPostProcessor

Returns:

a buffer containing the downloaded data, perhaps converted during content handling.

handleTextContent

protected ByteBuffer handleTextContent()
                                throws IOException

Handles Text content. If the content type is text/xml, AbstractRetrievalPostProcessor.handleXMLContent() is called. If the content type is text/html, AbstractRetrievalPostProcessor.handleHTMLContent() is called. For all other sub-types the content is logged as a message with level Level.SEVERE. Overridden to save text files in the cache.

Overrides:

handleTextContent in class AbstractRetrievalPostProcessor

Returns:

a buffer containing the retrieved text.

Throws:

IOException - if an IO error occurs while processing the data.

makeOutputFile

protected File makeOutputFile()

markResourceAbsent

protected void markResourceAbsent()

Description copied from class: AbstractRetrievalPostProcessor

Marks the retrieval target absent. Subclasses should override this method if they keep track of absent-resources. The default implementation does nothing.

Overrides:

markResourceAbsent in class AbstractRetrievalPostProcessor

overwriteExistingFile

protected boolean overwriteExistingFile()

Description copied from class: AbstractRetrievalPostProcessor

Indicates whether the retrieved data should be written to the output file if a file of the same name already exists. The default implementation of this method returns false (files are not overwritten).

Overrides:

overwriteExistingFile in class AbstractRetrievalPostProcessor

Returns:

true if an existing file should be overwritten, otherwise false.

saveBuffer

protected boolean saveBuffer()
                      throws IOException

Description copied from class: AbstractRetrievalPostProcessor

Saves the retrieved and possibly transformed data. The data may have been transformed during content handling.

The default implementation of this method simply calls AbstractRetrievalPostProcessor.saveBuffer(java.nio.ByteBuffer) with an argument of null.

Overrides:

saveBuffer in class AbstractRetrievalPostProcessor

Returns:

true if the buffer was saved, false if the output file could not be determined or already exists and not overwritten.

Throws:

IOException - if an IO error occurs while attempting to save the buffer.