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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK 11g Release 2 (11.1.2.1.0) E17493-02 |
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java.lang.Object oracle.javatools.buffer.ReadTextBufferDecorator
public abstract class ReadTextBufferDecorator
The ReadTextBufferDecorator
is a base decorator for a
ReadTextBuffer
. This allows additional behavior to be added
to a ReadTextBuffer
.
Field Summary | |
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protected ReadTextBuffer |
_rbuffer
The delegate ReadTextBuffer. |
Fields inherited from interface oracle.javatools.buffer.ReadTextBuffer |
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LOCK_STATUS_NONE, LOCK_STATUS_READ, LOCK_STATUS_UNSUPPORTED, LOCK_STATUS_WRITE |
Constructor Summary | |
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ReadTextBufferDecorator(ReadTextBuffer buffer)
Constructs the decorator for the delegate buffer. |
Method Summary | |
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char |
getChar(int offset)
Fetches the character from the given offset. |
char[] |
getChars(int offset,
int length)
Fetches a number of characters from the indicated offset in the buffer. |
int |
getLength()
Fetches the number of characters in this buffer. |
int |
getLockStatus()
Fetch the lock status for the current thread only. |
java.lang.String |
getString(int offset,
int length)
Fetches a number of characters from the indicated offset in the buffer and returns it as a String. |
void |
getText(int offset,
int length,
javax.swing.text.Segment segment)
Fetches the text contained within the given section of the TextBuffer The Segment object is
provided by the caller. |
void |
readLock()
Attempts to acquire a read lock on this text buffer for the purposes of reading the buffer - this is a blocking call. |
void |
readLockInterruptibly()
Attempts to acquire a read lock on this text buffer for the purposes of reading the buffer - this is a blocking call. |
void |
readUnlock()
Releases a held read lock on this text buffer. |
boolean |
tryReadLock()
Attempts to acquire a read lock on this buffer in a non-blocking manner. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected final ReadTextBuffer _rbuffer
Constructor Detail |
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public ReadTextBufferDecorator(ReadTextBuffer buffer)
buffer
- the buffer that the decorator delegates toMethod Detail |
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public int getLength()
getLength
in interface ReadTextBuffer
public char getChar(int offset) throws java.lang.IndexOutOfBoundsException
getChar
in interface ReadTextBuffer
offset
- the offset in the buffer to get the character from
java.lang.IndexOutOfBoundsException
- if offset is invalidpublic char[] getChars(int offset, int length) throws java.lang.IndexOutOfBoundsException
getChars
in interface ReadTextBuffer
offset
- the offset in the buffer to start fromlength
- number of characters to fetch
java.lang.IndexOutOfBoundsException
- if offset or length are invalidpublic java.lang.String getString(int offset, int length) throws java.lang.IndexOutOfBoundsException
getString
in interface ReadTextBuffer
offset
- the offset in the buffer to start fromlength
- number of characters to fetch
java.lang.IndexOutOfBoundsException
- if offset or length are invalidpublic void getText(int offset, int length, javax.swing.text.Segment segment) throws java.lang.IndexOutOfBoundsException
TextBuffer
The Segment
object is
provided by the caller.
getText
in interface ReadTextBuffer
offset
- the offset into the buffer representing the desired
start of the data >= 0length
- the length of the desired data >= 0segment
- the caller's Segment object to return the data in
java.lang.IndexOutOfBoundsException
Document.getText(int, int)
public void readLock()
Note that for TextBuffer
objects, a call to
readLock() must be matched by a call to readUnlock() even if
nested within a writeLock()/writeUnlock(). This is to help
guarantee correctness.
readLock
in interface ReadTextBuffer
TextBuffer.getLineMap()
,
TextBuffer.writeLock()
public void readLockInterruptibly() throws java.lang.InterruptedException
Note that for TextBuffer
objects, a call to
readLock() must be matched by a call to readUnlock() even if
nested within a writeLock()/writeUnlock(). This is to help
guarantee correctness.
readLockInterruptibly
in interface ReadTextBuffer
java.lang.InterruptedException
- if the current thread is in or gets put in
the interrupted state. The interrupted state
is cleared when this exception is thrown.TextBuffer.getLineMap()
,
TextBuffer.writeLock()
public boolean tryReadLock()
tryReadLock()
(i.e.,
where it returns true) must be matched by a call to
readUnlock()
.
tryReadLock
in interface ReadTextBuffer
readLock()
public void readUnlock()
readUnlock
in interface ReadTextBuffer
public int getLockStatus()
getLockStatus
in interface ReadTextBuffer
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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK 11g Release 2 (11.1.2.1.0) E17493-02 |
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