org.apache.lucene.store

Class MockIndexInputWrapper

java.lang.Object

org.apache.lucene.store.DataInput

org.apache.lucene.store.IndexInput

org.apache.lucene.store.MockIndexInputWrapper

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Cloneable

public class MockIndexInputWrapper
extends IndexInput

Used by MockDirectoryWrapper to create an input stream that keeps track of when it's been closed.

Constructor Summary

Constructors

Constructor and Description
MockIndexInputWrapper(MockDirectoryWrapper dir, java.lang.String name, IndexInput delegate) Construct an empty output buffer.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone() Returns a clone of this stream.
void	close() Closes the stream to further operations.
void	copyBytes(IndexOutput out, long numBytes) Copies numBytes bytes to the given IndexOutput.
long	getFilePointer() Returns the current position in this file, where the next read will occur.
long	length() The number of bytes in the file.
byte	readByte() Reads and returns a single byte.
void	readBytes(byte[] b, int offset, int len) Reads a specified number of bytes into an array at the specified offset.
void	readBytes(byte[] b, int offset, int len, boolean useBuffer) Reads a specified number of bytes into an array at the specified offset with control over whether the read should be buffered (callers who have their own buffer should pass in "false" for useBuffer).
void	readChars(char[] buffer, int start, int length) Reads Lucene's old "modified UTF-8" encoded characters into an array.
int	readInt() Reads four bytes and returns an int.
long	readLong() Reads eight bytes and returns a long.
java.lang.String	readString() Reads a string.
java.util.Map<java.lang.String,java.lang.String>	readStringStringMap()
int	readVInt() Reads an int stored in variable-length format.
long	readVLong() Reads a long stored in variable-length format.
void	seek(long pos) Sets current position in this file, where the next read will occur.
void	setModifiedUTF8StringsMode() Call this if readString should read characters stored in the old modified UTF8 format (length in java chars and java's modified UTF8 encoding).
void	skipChars(int length) Expert Similar to DataInput.readChars(char[], int, int) but does not do any conversion operations on the bytes it is reading in.

Methods inherited from class org.apache.lucene.store.IndexInput

toString

Methods inherited from class org.apache.lucene.store.DataInput

readShort

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MockIndexInputWrapper

public MockIndexInputWrapper(MockDirectoryWrapper dir,
                             java.lang.String name,
                             IndexInput delegate)

Construct an empty output buffer.

Method Detail

close

public void close()
           throws java.io.IOException

Description copied from class: IndexInput

Closes the stream to further operations.

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in class IndexInput

Throws:

java.io.IOException

clone

public java.lang.Object clone()

Description copied from class: DataInput

Returns a clone of this stream.

Clones of a stream access the same data, and are positioned at the same point as the stream they were cloned from.

Expert: Subclasses must ensure that clones may be positioned at different points in the input from each other and from the stream they were cloned from.

Overrides:

clone in class DataInput

getFilePointer

public long getFilePointer()

Description copied from class: IndexInput

Returns the current position in this file, where the next read will occur.

Specified by:

getFilePointer in class IndexInput

See Also:

IndexInput.seek(long)

seek

public void seek(long pos)
          throws java.io.IOException

Description copied from class: IndexInput

Sets current position in this file, where the next read will occur.

Specified by:

seek in class IndexInput

Throws:

java.io.IOException

See Also:

IndexInput.getFilePointer()

length

public long length()

Description copied from class: IndexInput

The number of bytes in the file.

Specified by:

length in class IndexInput

readByte

public byte readByte()
              throws java.io.IOException

Description copied from class: DataInput

Reads and returns a single byte.

Specified by:

readByte in class DataInput

Throws:

java.io.IOException

See Also:

DataOutput.writeByte(byte)

readBytes

public void readBytes(byte[] b,
                      int offset,
                      int len)
               throws java.io.IOException

Description copied from class: DataInput

Reads a specified number of bytes into an array at the specified offset.

Specified by:

readBytes in class DataInput

Parameters:

b - the array to read bytes into

offset - the offset in the array to start storing bytes

len - the number of bytes to read

Throws:

java.io.IOException

See Also:

DataOutput.writeBytes(byte[],int)

copyBytes

public void copyBytes(IndexOutput out,
                      long numBytes)
               throws java.io.IOException

Description copied from class: IndexInput

Copies numBytes bytes to the given IndexOutput.

NOTE: this method uses an intermediate buffer to copy the bytes. Consider overriding it in your implementation, if you can make a better, optimized copy.

NOTE ensure that there are enough bytes in the input to copy to output. Otherwise, different exceptions may be thrown, depending on the implementation.

Overrides:

copyBytes in class IndexInput

Throws:

java.io.IOException

readBytes

public void readBytes(byte[] b,
                      int offset,
                      int len,
                      boolean useBuffer)
               throws java.io.IOException

Description copied from class: DataInput

Reads a specified number of bytes into an array at the specified offset with control over whether the read should be buffered (callers who have their own buffer should pass in "false" for useBuffer). Currently only BufferedIndexInput respects this parameter.

Overrides:

readBytes in class DataInput

Parameters:

b - the array to read bytes into

offset - the offset in the array to start storing bytes

len - the number of bytes to read

useBuffer - set to false if the caller will handle buffering.

Throws:

java.io.IOException

See Also:

DataOutput.writeBytes(byte[],int)

readInt

public int readInt()
            throws java.io.IOException

Description copied from class: DataInput

Reads four bytes and returns an int.

Overrides:

readInt in class DataInput

Throws:

java.io.IOException

See Also:

DataOutput.writeInt(int)

readVInt

public int readVInt()
             throws java.io.IOException

Description copied from class: DataInput

Reads an int stored in variable-length format. Reads between one and five bytes. Smaller values take fewer bytes. Negative numbers are not supported.

Overrides:

readVInt in class DataInput

Throws:

java.io.IOException

See Also:

DataOutput.writeVInt(int)

readLong

public long readLong()
              throws java.io.IOException

Description copied from class: DataInput

Reads eight bytes and returns a long.

Overrides:

readLong in class DataInput

Throws:

java.io.IOException

See Also:

DataOutput.writeLong(long)

readVLong

public long readVLong()
               throws java.io.IOException

Description copied from class: DataInput

Reads a long stored in variable-length format. Reads between one and nine bytes. Smaller values take fewer bytes. Negative numbers are not supported.

Overrides:

readVLong in class DataInput

Throws:

java.io.IOException

readString

public java.lang.String readString()
                            throws java.io.IOException

Description copied from class: DataInput

Reads a string.

Overrides:

readString in class DataInput

Throws:

java.io.IOException

See Also:

DataOutput.writeString(String)

readStringStringMap

public java.util.Map<java.lang.String,java.lang.String> readStringStringMap()
                                                                     throws java.io.IOException

Overrides:

readStringStringMap in class DataInput

Throws:

java.io.IOException

setModifiedUTF8StringsMode

public void setModifiedUTF8StringsMode()

Description copied from class: DataInput

Call this if readString should read characters stored in the old modified UTF8 format (length in java chars and java's modified UTF8 encoding). This is used for indices written pre-2.4 See LUCENE-510 for details.

Overrides:

setModifiedUTF8StringsMode in class DataInput

readChars

public void readChars(char[] buffer,
                      int start,
                      int length)
               throws java.io.IOException

Description copied from class: DataInput

Reads Lucene's old "modified UTF-8" encoded characters into an array.

Overrides:

readChars in class DataInput

Parameters:

buffer - the array to read characters into

start - the offset in the array to start storing characters

length - the number of characters to read

Throws:

java.io.IOException

See Also:

DataOutput.writeChars(String,int,int)

skipChars

public void skipChars(int length)
               throws java.io.IOException

Description copied from class: IndexInput

Expert Similar to DataInput.readChars(char[], int, int) but does not do any conversion operations on the bytes it is reading in. It still has to invoke DataInput.readByte() just as DataInput.readChars(char[], int, int) does, but it does not need a buffer to store anything and it does not have to do any of the bitwise operations, since we don't actually care what is in the byte except to determine how many more bytes to read

Overrides:

skipChars in class IndexInput

Parameters:

length - The number of chars to read

Throws:

java.io.IOException