Package org.apache.derby.impl.io.vfmem
Class DataStoreEntry
- java.lang.Object
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- org.apache.derby.impl.io.vfmem.DataStoreEntry
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public class DataStoreEntry extends java.lang.Object
A data store entry representing either a file or a directory.If the entry is a directory, it doesn't create a data object.
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Field Summary
Fields Modifier and Type Field Description private boolean
isDir
Tells if this entry is a directory or a regular file.private boolean
isReadOnly
Tells if this entry is read-only or not.private java.lang.String
path
The path of this entry.private boolean
released
Tells if the entry has been released or not.private BlockedByteArray
src
The data of the entry.
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Constructor Summary
Constructors Constructor Description DataStoreEntry(java.lang.String path, boolean isDir)
Creates a new data store entry.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description private void
checkIfReleased()
Checks if this entry has been released.(package private) BlockedByteArrayInputStream
getInputStream()
Returns an input stream to read from this entry.(package private) BlockedByteArrayOutputStream
getOutputStream(boolean append)
Returns an output stream to write into this entry.boolean
isDirectory()
Tells if this entry is a directory.boolean
isReadOnly()
Tells if this entry is read-only.long
length()
Returns the length of this entry.(package private) void
release()
Relases this entry.void
setLength(long newLength)
Sets the length of this entry.void
setReadOnly()
Makes this entry read-only.
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Field Detail
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path
private final java.lang.String path
The path of this entry.
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isDir
private final boolean isDir
Tells if this entry is a directory or a regular file.
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isReadOnly
private boolean isReadOnly
Tells if this entry is read-only or not.
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src
private final BlockedByteArray src
The data of the entry.
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released
private volatile boolean released
Tells if the entry has been released or not.
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Method Detail
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isDirectory
public boolean isDirectory()
Tells if this entry is a directory.- Returns:
true
if directory,false
otherwise.
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getInputStream
BlockedByteArrayInputStream getInputStream() throws java.io.FileNotFoundException
Returns an input stream to read from this entry.- Returns:
- An
InputStream
-object. - Throws:
java.io.FileNotFoundException
- if this entry is a directory
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getOutputStream
BlockedByteArrayOutputStream getOutputStream(boolean append) throws java.io.FileNotFoundException
Returns an output stream to write into this entry.- Parameters:
append
- tells whether the entry should be appended or not- Returns:
- An
OutputStream
-object. - Throws:
java.io.FileNotFoundException
- if this entry is a directory, or is read-only
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length
public long length()
Returns the length of this entry.- Returns:
- The length in bytes.
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setReadOnly
public void setReadOnly()
Makes this entry read-only.
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isReadOnly
public boolean isReadOnly()
Tells if this entry is read-only.- Returns:
true
is read-only,false
if not.
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release
void release()
Relases this entry.
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setLength
public void setLength(long newLength)
Sets the length of this entry.- Parameters:
newLength
- the length in number of bytes
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checkIfReleased
private void checkIfReleased()
Checks if this entry has been released.- Throws:
java.lang.IllegalStateException
- if the entry has been released
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