com.pixelmed.dicom

Class StringAttribute

java.lang.Object

com.pixelmed.dicom.Attribute

com.pixelmed.dicom.StringAttribute

Direct Known Subclasses:

AgeStringAttribute, ApplicationEntityAttribute, CodeStringAttribute, DateAttribute, DateTimeAttribute, DecimalStringAttribute, IntegerStringAttribute, StringAttributeAffectedBySpecificCharacterSet, TimeAttribute, UniqueIdentifierAttribute, UniversalResourceAttribute

public abstract class StringAttribute
extends Attribute

An abstract class specializing Attribute for the family of string attributes.

Field Summary

Fields

Modifier and Type	Field and Description
protected SpecificCharacterSet	specificCharacterSet

Fields inherited from class com.pixelmed.dicom.Attribute

valueLength, valueMultiplicity

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	StringAttribute(AttributeTag t) Construct an (empty) attribute; called only by concrete sub-classes.
protected	StringAttribute(AttributeTag t, long vl, DicomInputStream i) Read an attribute from an input stream; called only by concrete sub-classes.
protected	StringAttribute(AttributeTag t, Long vl, DicomInputStream i) Read an attribute from an input stream; called only by concrete sub-classes.
protected	StringAttribute(AttributeTag t, long vl, DicomInputStream i, SpecificCharacterSet specificCharacterSet) Read an attribute from an input stream; called only by concrete sub-classes.
protected	StringAttribute(AttributeTag t, Long vl, DicomInputStream i, SpecificCharacterSet specificCharacterSet) Read an attribute from an input stream; called only by concrete sub-classes.
protected	StringAttribute(AttributeTag t, SpecificCharacterSet specificCharacterSet) Construct an (empty) attribute; called only by concrete sub-classes.

Method Summary

Modifier and Type	Method and Description
void	addValue(byte v) Add a(nother) byte value after any existing values of this attribute.
void	addValue(double v) Add a(nother) double value after any existing values of this attribute.
void	addValue(float v) Add a(nother) float value after any existing values of this attribute.
void	addValue(int v) Add a(nother) int value after any existing values of this attribute.
void	addValue(long v) Add a(nother) long value after any existing values of this attribute.
void	addValue(short v) Add a(nother) short value after any existing values of this attribute.
void	addValue(String v) Add a(nother) String value after any existing values of this attribute.
protected boolean	allowRepairOfIncorrectLength()
protected boolean	allowRepairOfInvalidCharacterReplacement()
boolean	areCharactersInValuesValid()
boolean	areLengthsOfValuesValid()
boolean	areValuesWellFormed()
protected void	flushCachedCopies()
byte[]	getByteValues() Get the values of this attribute as a byte array.
double[]	getDoubleValues() Get the values of this attribute as a double array.
float[]	getFloatValues() Get the values of this attribute as a float array.
int[]	getIntegerValues() Get the values of this attribute as an int array.
protected char	getInvalidCharacterReplacement()
long[]	getLongValues() Get the values of this attribute as a long array.
abstract int	getMaximumLengthOfSingleValue()
String[]	getOriginalStringValues() Get the values of this attribute as strings, the way they were originally inserted or read.
protected byte	getPadByte() Get the appropriate byte for padding a string to an even length.
long	getPaddedVL() Get the value length of this attribute, accounting for the need for even-length padding.
short[]	getShortValues() Get the values of this attribute as a short array.
SpecificCharacterSet	getSpecificCharacterSet() Get the specific character set for this attribute.
String[]	getStringValues(NumberFormat format) Get the values of this attribute as strings.
boolean	isCharacterInValueValid(int c)
boolean	isValid() Do the values of this attribute comply with standard VR requirements? E.g., Are only valid characters are present (for string and text attributes) and length is within limits?
void	removeValues() Remove any existing values, making the attribute empty (zero length).
boolean	repairValues() Repair any existing values of this attribute to make them comply with standard VR requirements.
void	setSpecificCharacterSet(SpecificCharacterSet specificCharacterSet) Set the specific character set for this attribute.
String	toString(DicomDictionary dictionary) Dump the contents of the attribute as a human-readable string.
protected String	translateByteArrayToString(byte[] bytes, int offset, int length) Decode a byte array into a string.
protected byte[]	translateStringToByteArray(String string) Encode a string into a byte array.
void	write(DicomOutputStream o) Write the entire attribute (including values) to the output stream.

Methods inherited from class com.pixelmed.dicom.Attribute

getByteValues, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrDefault, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrEmptyString, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDelimitedStringValuesOrNull, getDoubleValues, getDoubleValues, getElement, getFloatValues, getFloatValues, getGroup, getIntegerValues, getIntegerValues, getLengthOfEncodedValue, getLongValues, getLongValues, 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, getTag, getVL, getVM, getVR, getVRAsString, 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, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

specificCharacterSet

protected SpecificCharacterSet specificCharacterSet

Constructor Detail

StringAttribute

protected StringAttribute(AttributeTag t)

Construct an (empty) attribute; called only by concrete sub-classes.

Parameters:

t - the tag of the attribute

StringAttribute

protected StringAttribute(AttributeTag t,
                          long vl,
                          DicomInputStream i)
                   throws IOException,
                          DicomException

Read an attribute from an input stream; called only by concrete sub-classes.

Parameters:

t - the tag of the attribute

vl - the value length of the attribute

i - the input stream

Throws:

IOException - if an I/O error occurs

DicomException - if a DICOM parsing error occurs

StringAttribute

protected StringAttribute(AttributeTag t,
                          Long vl,
                          DicomInputStream i)
                   throws IOException,
                          DicomException

Read an attribute from an input stream; called only by concrete sub-classes.

Parameters:

t - the tag of the attribute

vl - the value length of the attribute

i - the input stream

Throws:

IOException - if an I/O error occurs

DicomException - if a DICOM parsing error occurs

StringAttribute

protected StringAttribute(AttributeTag t,
                          long vl,
                          DicomInputStream i,
                          SpecificCharacterSet specificCharacterSet)
                   throws IOException,
                          DicomException

Read an attribute from an input stream; called only by concrete sub-classes.

Parameters:

t - the tag of the attribute

vl - the value length of the attribute

i - the input stream

specificCharacterSet - the character set to be used for the text

Throws:

IOException - if an I/O error occurs

DicomException - if a DICOM parsing error occurs

StringAttribute

protected StringAttribute(AttributeTag t,
                          Long vl,
                          DicomInputStream i,
                          SpecificCharacterSet specificCharacterSet)
                   throws IOException,
                          DicomException

Read an attribute from an input stream; called only by concrete sub-classes.

Parameters:

t - the tag of the attribute

vl - the value length of the attribute

i - the input stream

specificCharacterSet - the character set to be used for the text

Throws:

IOException - if an I/O error occurs

DicomException - if a DICOM parsing error occurs

StringAttribute

protected StringAttribute(AttributeTag t,
                          SpecificCharacterSet specificCharacterSet)

Construct an (empty) attribute; called only by concrete sub-classes.

Parameters:

t - the tag of the attribute

specificCharacterSet - the character set to be used for the text

Method Detail

addValue

public void addValue(byte v)
              throws DicomException

Description copied from class: Attribute

Add a(nother) byte value after any existing values of this attribute.

Overrides:

addValue in class Attribute

Parameters:

v - value to add

Throws:

DicomException - not thrown

addValue

public void addValue(double v)
              throws DicomException

Description copied from class: Attribute

Add a(nother) double value after any existing values of this attribute.

Overrides:

addValue in class Attribute

Parameters:

v - value to add

Throws:

DicomException - not thrown

addValue

public void addValue(float v)
              throws DicomException

Description copied from class: Attribute

Add a(nother) float value after any existing values of this attribute.

Overrides:

addValue in class Attribute

Parameters:

v - value to add

Throws:

DicomException - not thrown

addValue

public void addValue(int v)
              throws DicomException

Description copied from class: Attribute

Add a(nother) int value after any existing values of this attribute.

Overrides:

addValue in class Attribute

Parameters:

v - value to add

Throws:

DicomException - not thrown

addValue

public void addValue(long v)
              throws DicomException

Description copied from class: Attribute

Add a(nother) long value after any existing values of this attribute.

Overrides:

addValue in class Attribute

Parameters:

v - value to add

Throws:

DicomException - not thrown

addValue

public void addValue(short v)
              throws DicomException

Description copied from class: Attribute

Add a(nother) short value after any existing values of this attribute.

Overrides:

addValue in class Attribute

Parameters:

v - value to add

Throws:

DicomException - not thrown

addValue

public void addValue(String v)
              throws DicomException

Description copied from class: Attribute

Add a(nother) String value after any existing values of this attribute.

Overrides:

addValue in class Attribute

Parameters:

v - value to add

Throws:

DicomException - if unsupported encoding

allowRepairOfIncorrectLength

protected boolean allowRepairOfIncorrectLength()

allowRepairOfInvalidCharacterReplacement

protected boolean allowRepairOfInvalidCharacterReplacement()

areCharactersInValuesValid

public boolean areCharactersInValuesValid()
                                   throws DicomException

Throws:

DicomException

areLengthsOfValuesValid

public boolean areLengthsOfValuesValid()
                                throws DicomException

Throws:

DicomException

areValuesWellFormed

public boolean areValuesWellFormed()
                            throws DicomException

Throws:

DicomException

flushCachedCopies

protected void flushCachedCopies()

getByteValues

public byte[] getByteValues()
                     throws DicomException

Get the values of this attribute as a byte array.

Returns the originally read byte values, if read from a stream, otherwise converts the string to bytes and pads them.

Overrides:

getByteValues in class Attribute

Returns:

the values as an array of bytes

Throws:

DicomException - if a DICOM parsing error occurs

getDoubleValues

public double[] getDoubleValues()
                         throws DicomException

Description copied from class: Attribute

Get the values of this attribute as a double array.

Overrides:

getDoubleValues in class Attribute

Returns:

the values as an array of double

Throws:

DicomException - not thrown

getFloatValues

public float[] getFloatValues()
                       throws DicomException

Description copied from class: Attribute

Get the values of this attribute as a float array.

Overrides:

getFloatValues in class Attribute

Returns:

the values as an array of float

Throws:

DicomException - not thrown

getIntegerValues

public int[] getIntegerValues()
                       throws DicomException

Description copied from class: Attribute

Get the values of this attribute as an int array.

Overrides:

getIntegerValues in class Attribute

Returns:

the values as an array of int

Throws:

DicomException - not thrown

getInvalidCharacterReplacement

protected char getInvalidCharacterReplacement()

getLongValues

public long[] getLongValues()
                     throws DicomException

Description copied from class: Attribute

Get the values of this attribute as a long array.

Overrides:

getLongValues in class Attribute

Returns:

the values as an array of long

Throws:

DicomException - not thrown

getMaximumLengthOfSingleValue

public abstract int getMaximumLengthOfSingleValue()

getOriginalStringValues

public String[] getOriginalStringValues()
                                 throws DicomException

Get the values of this attribute as strings, the way they were originally inserted or read.

Overrides:

getOriginalStringValues in class Attribute

Returns:

the values as an array of String

Throws:

DicomException - not thrown

getPadByte

protected byte getPadByte()

Get the appropriate byte for padding a string to an even length.

Returns:

the byte pad value appropriate to the VR

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)

getShortValues

public short[] getShortValues()
                       throws DicomException

Description copied from class: Attribute

Get the values of this attribute as a short array.

Overrides:

getShortValues in class Attribute

Returns:

the values as an array of short

Throws:

DicomException - not thrown

getSpecificCharacterSet

public SpecificCharacterSet getSpecificCharacterSet()

Get the specific character set for this attribute.

Returns:

the specific character set, or null if none

getStringValues

public String[] getStringValues(NumberFormat format)
                         throws DicomException

Get the values of this attribute as strings.

The strings are first cleaned up into a canonical form, to remove leading and trailing padding.

Overrides:

getStringValues in class Attribute

Parameters:

format - the format to use for each numerical or decimal value

Returns:

the values as an array of String

Throws:

DicomException - not thrown

isCharacterInValueValid

public boolean isCharacterInValueValid(int c)
                                throws DicomException

Throws:

DicomException

isValid

public boolean isValid()
                throws DicomException

Description copied from class: Attribute

Do the values of this attribute comply with standard VR requirements? E.g., Are only valid characters are present (for string and text attributes) and length is within limits?

Overrides:

isValid in class Attribute

Returns:

true if valid, false if invalid or validation not supported for the attribute type

Throws:

DicomException - if error in DICOM value extraction

removeValues

public void removeValues()
                  throws DicomException

Description copied from class: Attribute

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

Specified by:

removeValues in class Attribute

Throws:

DicomException - not thrown

repairValues

public boolean repairValues()
                     throws DicomException

Description copied from class: Attribute

Repair any existing values of this attribute to make them comply with standard VR requirements. E.g., truncate them if they are too long. N.B., Not all types of attribute support repair.

Overrides:

repairValues in class Attribute

Returns:

true if successfully repaired or was already valid

Throws:

DicomException - if error in DICOM value extraction

setSpecificCharacterSet

public void setSpecificCharacterSet(SpecificCharacterSet specificCharacterSet)

Set the specific character set for this attribute.

Parameters:

specificCharacterSet - the specific character set, or null if none

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

translateByteArrayToString

protected String translateByteArrayToString(byte[] bytes,
                                            int offset,
                                            int length)

Decode a byte array into a string.

Parameters:

bytes - the byte buffer in which the encoded string is located

offset - the offset into the buffer

length - the number of bytes to be decoded

Returns:

the string decoded according to the specified or default specific character set

translateStringToByteArray

protected byte[] translateStringToByteArray(String string)
                                     throws UnsupportedEncodingException

Encode a string into a byte array.

Parameters:

string - the string to be encoded

Returns:

the byte array encoded according to the specified or default specific character set

Throws:

UnsupportedEncodingException - if the encoding is not supported

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 - the output stream

Throws:

IOException - if an I/O error occurs

DicomException - if a DICOM encoding error occurs