Package opendap.dap

Class Attribute

java.lang.Object

opendap.dap.DAPNode

opendap.dap.Attribute

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

Alias

public class Attribute
extends DAPNode

An Attribute holds information about a single attribute in an AttributeTable. It has a type, and contains either a Vector of Strings containing the attribute's values, or a reference to an AttributeTable, if the Attribute is a container. An Attribute may also be created as an alias pointing to another Attribute of any type, including container.

See Also:

AttributeTable, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class opendap.dap.DAPNode

DAPNode.CloneMap

Field Summary

Fields

Modifier and Type	Field	Description
static int	ALIAS	Alias attribute type.
static int	BYTE	Byte attribute type.
static int	CONTAINER	Container attribute type.
static int	FLOAT32	Float32 attribute type.
static int	FLOAT64	Float64 attribute type.
static int	INT16	Int16 attribute type.
static int	INT32	Int32 attribute type.
static int	STRING	String attribute type.
static int	UINT16	UInt16 attribute type.
static int	UINT32	UInt32 attribute type.
static int	UNKNOWN	Unknown attribute type.
static int	URL	URL attribute type.

Fields inherited from class opendap.dap.DAPNode

_nameClear, _nameEncoded, log

Constructor Summary

Constructors

Constructor	Description
Attribute(int type, String clearname, String value)	Construct an Attribute with the given type and initial value.
Attribute(int type, String clearname, String value, boolean check)	Construct an Attribute with the given type and initial value.
Attribute(String clearname, int type)	Construct an empty attribute with the given type.
Attribute(String clearname, AttributeTable container)	Construct a container attribute.
Attribute(AttributeTable container)	Deprecated. Use the ctor with the name.

Method Summary

Modifier and Type	Method	Description
void	appendValue(String value)	Append a value to this attribute.
void	appendValue(String value, boolean check)	Append a value to this attribute.
DAPNode	cloneDAG(DAPNode.CloneMap map)	Returns a clone of this Attribute.
void	deleteValueAt(int index)	Remove the i'th String from this attribute.
AttributeTable	getContainer()	Returns the AttributeTable container.
AttributeTable	getContainerN()	Returns the AttributeTable container.
int	getNumVal()	Returns the nummber of values held in this attribute.
int	getType()	Returns the attribute type constant.
String	getTypeString()	Returns the attribute type as a String.
static int	getTypeVal(String s)	Returns the attribute type as a String.
String	getValueAt(int index)	Returns the attribute value at index.
String	getValueAtN(int index)	Returns the attribute value at index.
Enumeration	getValues()	Returns the values of this attribute as an Enumeration of String.
Iterator	getValuesIterator()	Returns the values of this attribute as an Enumeration of String.
boolean	isAlias()	Returns true if the attribute is an alias.
boolean	isContainer()	Returns true if the attribute is a container.
void	print(OutputStream os)	Print the attribute on the given OutputStream with four spaces of indentation.
void	print(OutputStream os, String pad)	Print the attribute on the given OutputStream.
void	print(PrintWriter os)	Print the attribute on the given PrintWriter with four spaces of indentation.
void	print(PrintWriter os, String pad)
void	printXML(OutputStream os)
void	printXML(OutputStream os, String pad)
void	printXML(PrintWriter pw)
void	printXML(PrintWriter pw, String pad)
void	printXML(PrintWriter pw, String pad, boolean constrained)

Methods inherited from class opendap.dap.DAPNode

clone, cloneDAG, getClearName, getEncodedName, getParent, isProject, setClearName, setEncodedName, setParent, setProject, setProject, setProjected

Methods inherited from class java.lang.Object

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

Field Detail

UNKNOWN

public static final int UNKNOWN

Unknown attribute type. This is currently unused.

See Also:

Constant Field Values

ALIAS

public static final int ALIAS

Alias attribute type. This is an attribute that works like a UNIX style soft link to another attribute.

See Also:

Constant Field Values

CONTAINER

public static final int CONTAINER

Container attribute type. This Attribute holds an AttributeTable.

See Also:

Constant Field Values

BYTE

public static final int BYTE

Byte attribute type. Holds an unsigned Byte.

See Also:

Constant Field Values

INT16

public static final int INT16

Int16 attribute type. Holds a signed Short.

See Also:

Constant Field Values

UINT16

public static final int UINT16

UInt16 attribute type. Holds an unsigned Short.

See Also:

Constant Field Values

INT32

public static final int INT32

Int32 attribute type. Holds a signed Integer.

See Also:

Constant Field Values

UINT32

public static final int UINT32

UInt32 attribute type. Holds an unsigned Integer.

See Also:

Constant Field Values

FLOAT32

public static final int FLOAT32

Float32 attribute type. Holds a Float.

See Also:

Constant Field Values

FLOAT64

public static final int FLOAT64

Float64 attribute type. Holds a Double.

See Also:

Constant Field Values

STRING

public static final int STRING

String attribute type. Holds a String.

See Also:

Constant Field Values

URL

public static final int URL

URL attribute type. Holds a String representing a URL.

See Also:

Constant Field Values

Constructor Detail

Attribute

public Attribute(AttributeTable container)

Deprecated.

Use the ctor with the name.

Construct a container attribute.

Parameters:

container - the AttributeTable container.

Attribute

public Attribute(int type,
                 String clearname,
                 String value,
                 boolean check)
          throws AttributeBadValueException

Construct an Attribute with the given type and initial value.

Parameters:

type - the type of attribute to create. Use one of the type constants defined by this class.

clearname - the name of the attribute.

value - the initial value of this attribute. Use the appendValue method to create a vector of values.

check - if true, check the value and throw AttributeBadValueException if it's not valid; if false do not check its validity.

Throws:

AttributeBadValueException - thrown if the value is not a legal member of type

Attribute

public Attribute(int type,
                 String clearname,
                 String value)
          throws AttributeBadValueException

Construct an Attribute with the given type and initial value. Checks the value of the attribute and throws an exception if it's not valid.

Parameters:

type - the type of attribute to create. Use one of the type constants defined by this class.

clearname - the name of the attribute.

value - the initial value of this attribute. Use the appendValue method to create a vector of values.

Throws:

AttributeBadValueException - thrown if the value is not a legal member of type

Attribute

public Attribute(String clearname,
                 AttributeTable container)

Construct a container attribute.

Parameters:

container - the AttributeTable container.

Attribute

public Attribute(String clearname,
                 int type)
          throws IllegalArgumentException

Construct an empty attribute with the given type.

Parameters:

type - the type of attribute to create. Use one of the type constants defined by this class, other than CONTAINER.

Throws:

IllegalArgumentException - thrown if type is CONTAINER. To construct an empty container attribute, first construct and empty AttributeTable and then use that to construct the Attribute.

Method Detail

getTypeString

public final String getTypeString()

Returns the attribute type as a String.

Returns:

the attribute type String.

getTypeVal

public static final int getTypeVal(String s)

Returns the attribute type as a String.

Returns:

the attribute type String.

getType

public int getType()

Returns the attribute type constant.

Returns:

the attribute type constant.

isContainer

public boolean isContainer()

Returns true if the attribute is a container.

Returns:

true if the attribute is a container.

isAlias

public boolean isAlias()

Returns true if the attribute is an alias.

Returns:

true if the attribute is an alias.

getContainer

public AttributeTable getContainer()
                            throws NoSuchAttributeException

Returns the AttributeTable container.

Returns:

the AttributeTable container.

Throws:

NoSuchAttributeException - If the instance of Attribute on which it is called is not a container.

getContainerN

public AttributeTable getContainerN()

Returns the AttributeTable container.

Returns:

the AttributeTable container, or null if not a container.

getValues

public Enumeration getValues()
                      throws NoSuchAttributeException

Returns the values of this attribute as an Enumeration of String.

Returns:

an Enumeration of String.

Throws:

NoSuchAttributeException

getValuesIterator

public Iterator getValuesIterator()

Returns the values of this attribute as an Enumeration of String.

Returns:

an Iterator of String , or null if a container..

getNumVal

public int getNumVal()
              throws NoSuchAttributeException

Returns the nummber of values held in this attribute.

Returns:

the attribute String at index.

Throws:

NoSuchAttributeException

getValueAt

public String getValueAt(int index)
                  throws NoSuchAttributeException

Returns the attribute value at index.

Parameters:

index - the index of the attribute value to return.

Returns:

the attribute String at index.

Throws:

NoSuchAttributeException

getValueAtN

public String getValueAtN(int index)

Returns the attribute value at index.

Parameters:

index - the index of the attribute value to return.

Returns:

the attribute String at index, or null if a container..

appendValue

public void appendValue(String value)
                 throws NoSuchAttributeException,
                        AttributeBadValueException

Append a value to this attribute. Always checks the validity of the attribute's value.

Parameters:

value - the attribute String to add.

Throws:

AttributeBadValueException - thrown if the value is not a legal member of type

NoSuchAttributeException

appendValue

public void appendValue(String value,
                        boolean check)
                 throws NoSuchAttributeException,
                        AttributeBadValueException

Append a value to this attribute.

Parameters:

value - the attribute String to add.

check - if true, check the validity of he attribute's value, if false don't.

Throws:

AttributeBadValueException - thrown if the value is not a legal member of type

NoSuchAttributeException

deleteValueAt

public void deleteValueAt(int index)
                   throws AttributeBadValueException,
                          NoSuchAttributeException

Remove the i'th String from this attribute.

Parameters:

index - the index of the value to remove.

Throws:

AttributeBadValueException

NoSuchAttributeException

print

public void print(PrintWriter os,
                  String pad)

print

public final void print(OutputStream os,
                        String pad)

Print the attribute on the given OutputStream.

Parameters:

os - the OutputStream to use for output.

pad - the number of spaces to indent each line.

print

public final void print(PrintWriter os)

Print the attribute on the given PrintWriter with four spaces of indentation.

Parameters:

os - the PrintWriter to use for output.

print

public final void print(OutputStream os)

Print the attribute on the given OutputStream with four spaces of indentation.

Parameters:

os - the OutputStream to use for output.

printXML

public void printXML(OutputStream os)

printXML

public void printXML(OutputStream os,
                     String pad)

printXML

public void printXML(PrintWriter pw)

printXML

public void printXML(PrintWriter pw,
                     String pad)

printXML

public void printXML(PrintWriter pw,
                     String pad,
                     boolean constrained)

cloneDAG

public DAPNode cloneDAG(DAPNode.CloneMap map)
                 throws CloneNotSupportedException

Returns a clone of this Attribute. See DAPNode.cloneDag()

Overrides:

cloneDAG in class DAPNode

Parameters:

map - track previously cloned nodes

Returns:

a clone of this Attribute.

Throws:

CloneNotSupportedException