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java.lang.Objectorg.basex.io.TableAccess
org.basex.io.TableDiskAccess
public final class TableDiskAccess
This class stores the table on disk and reads it block-wise.
Constructor Summary | |
---|---|
TableDiskAccess(java.lang.String nm,
java.lang.String f)
Constructor. |
Method Summary | |
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int |
blocks()
Return the number of used blocks; needed for JUnit tests. |
void |
close()
Closes the table access. |
void |
delete(int first,
int nr)
Delete a range of entries. |
void |
flush()
Flushes the table contents. |
void |
insert(int pre,
byte[] entries)
Insert entries. |
int |
read1(int pos,
int off)
Reads a byte from the specified position and returns it as integer. |
int |
read2(int pos,
int off)
Reads a short value from the specified position and returns it as integer. |
int |
read4(int pos,
int off)
Reads an integer value from the specified position. |
long |
read5(int pos,
int off)
Reads an integer value from the specified position. |
int |
size()
Return the entryCount; needed for JUnit tests. |
void |
write1(int pos,
int off,
int v)
Writes a byte to the specified position. |
void |
write2(int pos,
int off,
int v)
Writes 2 bytes to the specified position. |
void |
write4(int pos,
int off,
int v)
Writes an integer value to the specified position. |
void |
write5(int pos,
int off,
long v)
Writes a 5-byte value to the specified position. |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public TableDiskAccess(java.lang.String nm, java.lang.String f) throws java.io.IOException
nm
- name of the databasef
- prefix for all files (no ending)
java.io.IOException
- in case files cannot be readMethod Detail |
---|
public void flush() throws java.io.IOException
TableAccess
flush
in class TableAccess
java.io.IOException
- in case of write errorspublic void close() throws java.io.IOException
TableAccess
close
in class TableAccess
java.io.IOException
- in case of write errorspublic int read1(int pos, int off)
TableAccess
read1
in class TableAccess
pos
- pre valueoff
- offset
public int read2(int pos, int off)
TableAccess
read2
in class TableAccess
pos
- pre valueoff
- offset
public int read4(int pos, int off)
TableAccess
read4
in class TableAccess
pos
- pre valueoff
- offset
public long read5(int pos, int off)
TableAccess
read5
in class TableAccess
pos
- pre valueoff
- offset
public void write1(int pos, int off, int v)
TableAccess
write1
in class TableAccess
pos
- pre valueoff
- offsetv
- value to be writtenpublic void write2(int pos, int off, int v)
TableAccess
write2
in class TableAccess
pos
- pre valueoff
- offsetv
- value to be writtenpublic void write4(int pos, int off, int v)
TableAccess
write4
in class TableAccess
pos
- pre valueoff
- offsetv
- value to be writtenpublic void write5(int pos, int off, long v)
TableAccess
write5
in class TableAccess
pos
- pre valueoff
- offsetv
- value to be writtenpublic void delete(int first, int nr)
TableAccess
delete
in class TableAccess
first
- pre value of the first node to deletenr
- number of entries to be deletedpublic void insert(int pre, byte[] entries)
TableAccess
insert
in class TableAccess
pre
- pre value of node to insert afterentries
- array of bytes containing the entries to insertpublic int size()
public int blocks()
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