com.pixelmed.dicom

Class OtherByteAttributeMultipleFilesOnDisk

java.lang.Object

com.pixelmed.dicom.Attribute

com.pixelmed.dicom.OtherByteAttributeMultipleFilesOnDisk

public class OtherByteAttributeMultipleFilesOnDisk
extends Attribute

A concrete class specializing Attribute for Other Byte (OB) attributes whose values are not memory resident but rather are stored in multiple files on disk.

See Also:

Attribute, AttributeFactory, AttributeList

Field Summary

Fields

Modifier and Type	Field and Description
protected long[]	byteOffsets
protected boolean	deleteFilesWhenNoLongerNeeded
protected File[]	files
protected long[]	lengths

Fields inherited from class com.pixelmed.dicom.Attribute

valueLength, valueMultiplicity

Constructor Summary

Constructors

Constructor and Description
OtherByteAttributeMultipleFilesOnDisk(AttributeTag t) Construct an (empty) attribute.
OtherByteAttributeMultipleFilesOnDisk(AttributeTag t, File[] files) Read an attribute from a set of files.
OtherByteAttributeMultipleFilesOnDisk(AttributeTag t, File[] files, long[] byteOffsets, long[] lengths) Read an attribute from a set of files.
OtherByteAttributeMultipleFilesOnDisk(AttributeTag t, String[] fileNames) Read an attribute from a set of files.
OtherByteAttributeMultipleFilesOnDisk(AttributeTag t, String[] fileNames, long[] byteOffsets, long[] lengths) Read an attribute from a set of files.

Method Summary

Modifier and Type	Method and Description
void	deleteFilesWhenNoLongerNeeded()
protected void	finalize()
long[]	getByteOffsets()
byte[]	getByteValues() Get the values of this attribute as a byte array.
File[]	getFiles()
long[]	getLengths()
long	getPaddedVL() Get the value length of this attribute, accounting for the need for even-length padding.
byte[]	getVR() Get the value representation of this attribute (OB).
void	removeValues() Remove any existing values, making the attribute empty (zero length).
void	setFiles(File[] files, long[] byteOffsets, long[] lengths)
String	toString(DicomDictionary dictionary) Dump the contents of the attribute as a human-readable string.
void	write(DicomOutputStream o) Write the entire attribute (including values) to the output stream.

Methods inherited from class com.pixelmed.dicom.Attribute

addValue, addValue, addValue, addValue, addValue, addValue, addValue, getByteValues, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDoubleValues, getDoubleValues, getDoubleValues, getElement, getFloatValues, getFloatValues, getFloatValues, getGroup, getIntegerValues, getIntegerValues, getIntegerValues, getLengthOfEncodedValue, getLongValues, getLongValues, getLongValues, getOriginalStringValues, getShortValues, getSingleDoubleValueOrDefault, getSingleDoubleValueOrDefault, getSingleDoubleValueOrDefault, getSingleFloatValueOrDefault, getSingleFloatValueOrDefault, getSingleFloatValueOrDefault, getSingleIntegerValueOrDefault, getSingleIntegerValueOrDefault, getSingleIntegerValueOrDefault, getSingleLongValueOrDefault, getSingleLongValueOrDefault, getSingleLongValueOrDefault, getSingleStringValueOrDefault, getSingleStringValueOrDefault, getSingleStringValueOrDefault, getSingleStringValueOrDefault, getSingleStringValueOrDefault, getSingleStringValueOrDefault, getSingleStringValueOrEmptyString, getSingleStringValueOrEmptyString, getSingleStringValueOrEmptyString, getSingleStringValueOrEmptyString, getSingleStringValueOrEmptyString, getSingleStringValueOrEmptyString, getSingleStringValueOrNull, getSingleStringValueOrNull, getSingleStringValueOrNull, getSingleStringValueOrNull, getSingleStringValueOrNull, getSingleStringValueOrNull, getStringValues, getStringValues, getStringValues, getStringValues, getStringValues, getStringValues, getTag, getVL, getVM, getVRAsString, isValid, repairValues, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValues, setValues, setValues, setValues, setValues, setValues, setValues, toString, writeBase

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

byteOffsets

protected long[] byteOffsets

deleteFilesWhenNoLongerNeeded

protected boolean deleteFilesWhenNoLongerNeeded

files

protected File[] files

lengths

protected long[] lengths

Constructor Detail

OtherByteAttributeMultipleFilesOnDisk

public OtherByteAttributeMultipleFilesOnDisk(AttributeTag t)

Construct an (empty) attribute.

Parameters:

t - the tag of the attribute

OtherByteAttributeMultipleFilesOnDisk

public OtherByteAttributeMultipleFilesOnDisk(AttributeTag t,
                                             File[] files)
                                      throws IOException,
                                             DicomException

Read an attribute from a set of files.

Parameters:

t - the tag of the attribute

files - the input files

Throws:

IOException

DicomException

OtherByteAttributeMultipleFilesOnDisk

public OtherByteAttributeMultipleFilesOnDisk(AttributeTag t,
                                             File[] files,
                                             long[] byteOffsets,
                                             long[] lengths)
                                      throws IOException,
                                             DicomException

Read an attribute from a set of files.

Parameters:

t - the tag of the attribute

files - the input files

byteOffsets - the byte offsets in the files of the start of the data, one entry for each file, or null if 0 for all files

lengths - the lengths in the files from the the start of the data, one entry for each file, or null if the remaining file length after the byteOffset, if any

Throws:

IOException

DicomException

OtherByteAttributeMultipleFilesOnDisk

public OtherByteAttributeMultipleFilesOnDisk(AttributeTag t,
                                             String[] fileNames)
                                      throws IOException,
                                             DicomException

Read an attribute from a set of files.

Parameters:

t - the tag of the attribute

fileNames - the input files

Throws:

IOException

DicomException

OtherByteAttributeMultipleFilesOnDisk

public OtherByteAttributeMultipleFilesOnDisk(AttributeTag t,
                                             String[] fileNames,
                                             long[] byteOffsets,
                                             long[] lengths)
                                      throws IOException,
                                             DicomException

Read an attribute from a set of files.

Parameters:

t - the tag of the attribute

fileNames - the input files

byteOffsets - the byte offsets in the files of the start of the data, one entry for each file, or null if 0 for all files

lengths - the lengths in the files from the the start of the data, one entry for each file, or null if the remaining file length after the byteOffset, if any

Throws:

IOException

DicomException

Method Detail

deleteFilesWhenNoLongerNeeded

public void deleteFilesWhenNoLongerNeeded()

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable

getByteOffsets

public long[] getByteOffsets()

Returns:

the per-file byte offsets to the frame data

getByteValues

public byte[] getByteValues()
                     throws DicomException

Get the values of this attribute as a byte array.

This allocates a new array of sufficient length, which may fail if it is too large, and defeats the point of leaving the byte values on disk in the first place. However, it is a fallback for when the caller does not want to go to the trouble of creating a MappedByteBuffer from the file, or more likely is not even aware that the attribute values have been left on disk.

Overrides:

getByteValues in class Attribute

Returns:

the values as an array of bytes

Throws:

DicomException - thrown if values cannot be read

getFiles

public File[] getFiles()

Returns:

the files containing the data

getLengths

public long[] getLengths()

Returns:

the per-file lengths of the data for each frame (after the byte offset) in bytes

getPaddedVL

public long getPaddedVL()

Description copied from class: Attribute

Get the value length of this attribute, accounting for the need for even-length padding.

Overrides:

getPaddedVL in class Attribute

Returns:

the value length (padded to an even length)

getVR

public byte[] getVR()

Get the value representation of this attribute (OB).

Overrides:

getVR in class Attribute

Returns:

'O','B' in ASCII as a two byte array; see ValueRepresentation

removeValues

public void removeValues()

Description copied from class: Attribute

Remove any existing values, making the attribute empty (zero length).

Specified by:

removeValues in class Attribute

setFiles

public void setFiles(File[] files,
                     long[] byteOffsets,
                     long[] lengths)
              throws IOException

Parameters:

files - the input files

byteOffsets - the byte offsets in the files of the start of the data, one entry for each file, or null if 0 for all files

lengths - the lengths in the files from the the start of the data, one entry for each file, or null if the remaining file length after the byteOffset, if any

Throws:

IOException

toString

public String toString(DicomDictionary dictionary)

Description copied from class: Attribute

Dump the contents of the attribute as a human-readable string.

No new line is appended.

The result is of the form:

 (0xgggg,0xeeee) Name VR=<XX> VL=<0xnnnn> <...>
 

For example:

 (0x0018,0x0020) ScanningSequence VR=<CS> VL=<0x2> <GR>
 

Overrides:

toString in class Attribute

Parameters:

dictionary - the dictionary to use to look up the name

Returns:

a single String value

write

public void write(DicomOutputStream o)
           throws DicomException,
                  IOException

Description copied from class: Attribute

Write the entire attribute (including values) to the output stream.

Specified by:

write in class Attribute

Parameters:

o -

Throws:

IOException

DicomException