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java.lang.Objectjhplot.io.HFile
public class HFile
Write or read objects in sequential order using the Java serialization. The objects inside files are gzipped on-fly. The size of serialized files should be significantly smaller than when using HFile class. Use "close()" to flush buffered output stream. Use HFileBrowser to browser all entries in a GUI frame. Normally, files should extension "ser". Files can be viewed using HFileBrowser.
Field Summary | |
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java.io.FileOutputStream |
oof
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java.io.ObjectOutputStream |
oos
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java.io.File |
recordsFile
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Constructor Summary | |
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HFile(java.lang.String file)
Open file for reading objects from a serialized file in sequential order. |
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HFile(java.lang.String file,
java.lang.String option)
Open file for reading objects from a serialized file in sequential order. |
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HFile(java.lang.String file,
java.lang.String option,
boolean compression)
Open a file to write/read objects to/from a serialized file in sequential order. |
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HFile(java.lang.String file,
java.lang.String option,
boolean compression,
int bufferSize)
Open a file to write/read objects to/from a serialized file in sequential order. |
Method Summary | |
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boolean |
close()
Close the file |
int |
getBufferSize()
Get current buffer size for I/O. |
int |
getEntries()
Return processed number of entries |
java.lang.Object |
read()
Get object from a file. |
void |
setFlush(int reset)
Set after how many events data will be flushed. |
boolean |
write(java.lang.Object ob)
Add an object to a file |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public java.io.File recordsFile
public java.io.FileOutputStream oof
public java.io.ObjectOutputStream oos
Constructor Detail |
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public HFile(java.lang.String file, java.lang.String option, boolean compression, int bufferSize)
file
- File nameoption
- Option to create the file. If "w" - write a file (or read)
file, if "r" only read created file.compression
- if true, objects are compressed on-fly using GZIPbufferSize
- set buffer size for I/O. It is best to use buffer sizes that
are multiples of 1024 bytes.public HFile(java.lang.String file, java.lang.String option, boolean compression)
file
- File nameoption
- Option to create the file. If "w" - write a file (or read)
file, if "r" only read created file.compression
- if true, objects are compressed on-fly using GZIPbuffer
- set buffer size for I/O. It is best to use buffer sizes that
are multiples of 1024 bytes.public HFile(java.lang.String file)
file
- File namepublic HFile(java.lang.String file, java.lang.String option)
file
- File nameoption
- Option to create the file. If "w" - write a file (or read)
file, if "r" only read created file.Method Detail |
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public int getBufferSize()
public boolean write(java.lang.Object ob)
ob
- Objectkey
- key for object
public void setFlush(int reset)
reset
- after how many events data will be reset.public int getEntries()
public java.lang.Object read()
public boolean close()
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