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When deleting a document in NPOIFS, free the underlying blocks

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1590160 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2014-04-25 22:00:30 +00:00
parent fb89f2c2aa
commit 0bdc025279
3 changed files with 32 additions and 9 deletions
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4
src/java/org/apache/poi/poifs/filesystem/DirectoryNode.java
View File

@ -295,7 +295,11 @@ public class DirectoryNode
if(_ofilesystem != null) {
_ofilesystem.remove(entry);
} else {
try {
_nfilesystem.remove(entry);
} catch (IOException e) {
// TODO Work out how to report this, given we can't change the method signature...
}
}
}
return rval;

8
src/java/org/apache/poi/poifs/filesystem/NPOIFSDocument.java
View File

@ -128,6 +128,14 @@ public final class NPOIFSDocument implements POIFSViewable {
_property.setStartBlock(_stream.getStartBlock());
}
/**
* Frees the underlying stream and property
*/
void free() throws IOException {
_stream.free();
_property.setStartBlock(POIFSConstants.END_OF_CHAIN);
}
int getDocumentBlockSize() {
return _block_size;
}

15
src/java/org/apache/poi/poifs/filesystem/NPOIFSFileSystem.java
View File

@ -44,6 +44,7 @@ import org.apache.poi.poifs.nio.ByteArrayBackedDataSource;
import org.apache.poi.poifs.nio.DataSource;
import org.apache.poi.poifs.nio.FileBackedDataSource;
import org.apache.poi.poifs.property.DirectoryProperty;
import org.apache.poi.poifs.property.DocumentProperty;
import org.apache.poi.poifs.property.NPropertyTable;
import org.apache.poi.poifs.storage.BATBlock;
import org.apache.poi.poifs.storage.BATBlock.BATBlockAndIndex;
@ -431,7 +432,11 @@ public class NPOIFSFileSystem extends BlockStore
// The header block doesn't count, so add one
long blockWanted = offset + 1;
long startAt = blockWanted * bigBlockSize.getBigBlockSize();
try {
return _data.read(bigBlockSize.getBigBlockSize(), startAt);
} catch (IndexOutOfBoundsException e) {
throw new IndexOutOfBoundsException("Block " + offset + " not found - " + e);
}
}
/**
@ -820,9 +825,15 @@ public class NPOIFSFileSystem extends BlockStore
*
* @param entry to be removed
*/
void remove(EntryNode entry)
void remove(EntryNode entry) throws IOException
{
// If it's a document, free the blocks
if (entry instanceof DocumentEntry) {
NPOIFSDocument doc = new NPOIFSDocument((DocumentProperty)entry.getProperty(), this);
doc.free();
}
// Now zap it from the properties list
_property_table.removeProperty(entry.getProperty());
}