net.dpml.metro.info
Class EntryDescriptor

java.lang.Object
  net.dpml.metro.info.EntryDescriptor

All Implemented Interfaces:

Comparable, Serializable

public final class EntryDescriptor

extends Object

implements Serializable, Comparable

A descriptor that describes a value that must be placed in components Context. It contains information about;

• key: the key that component uses to look up entry
• classname: the class/interface of the entry
• isOptional: true if entry is optional rather than required

Version:

1.0.1

Author:

Digital Product Meta Library

See Also:

Serialized Form

Field Summary

static String	GET Constant prefix for get operations.
static boolean	OPTIONAL Optional constant.
static boolean	REQUIRED Required constant.

Constructor Summary

EntryDescriptor(String key, String classname)
Construct an non-volotile required EntryDescriptor.

EntryDescriptor(String key, String classname, boolean optional)
Construct an non-volotile EntryDescriptor.

EntryDescriptor(String key, String classname, boolean optional, boolean isVolatile)
Construct an EntryDescriptor.

Method Summary

int	compareTo(Object other) Compare this entry with another entry.
boolean	equals(Object other) Test is the supplied object is equal to this object.
String	getClassname() Return the type of value that is stored in the context entry.
static String	getEntryKey(Method method) Utility function that covers a supplied method to a entry name.
String	getKey() Return the key that Component uses to lookup entry.
boolean	getOptional() Return true if entry is optional, false otherwise.
boolean	getVolatile() Return true if entry is volotile.
int	hashCode() Return the hashcode for the object.
boolean	isOptional() Return true if entry is optional, false otherwise.
boolean	isRequired() Return true if entry is required, false otherwise.
boolean	isVolatile() Return true if entry is volotile.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

GET

public static final String GET

Constant prefix for get operations.

See Also:

Constant Field Values

OPTIONAL

public static final boolean OPTIONAL

Optional constant.

See Also:

Constant Field Values

REQUIRED

public static final boolean REQUIRED

Required constant.

See Also:

Constant Field Values

Constructor Detail

EntryDescriptor

public EntryDescriptor(String key,
                       String classname)
                throws NullPointerException

Construct an non-volotile required EntryDescriptor.

Parameters:

key - the context entry key

classname - the classname of the context entry

Throws:

NullPointerException - if the key or type value are null

EntryDescriptor

public EntryDescriptor(String key,
                       String classname,
                       boolean optional)
                throws NullPointerException

Construct an non-volotile EntryDescriptor.

Parameters:

key - the context entry key

classname - the classname of the context entry

optional - TRUE if this is an optional entry

Throws:

NullPointerException - if the key or type value are null

EntryDescriptor

public EntryDescriptor(String key,
                       String classname,
                       boolean optional,
                       boolean isVolatile)
                throws NullPointerException

Construct an EntryDescriptor.

Parameters:

key - the context entry key

classname - the classname of the context entry

optional - TRUE if this is an optional entry

isVolatile - TRUE if the entry is consider to be immutable

Throws:

NullPointerException - if the key or type value are null

Method Detail

getEntryKey

public static String getEntryKey(Method method)

Utility function that covers a supplied method to a entry name.

Parameters:

method - the method

Returns:

the key

See Also:

Introspector.decapitalize(String)

getKey

public String getKey()

Return the key that Component uses to lookup entry.

Returns:

the key that Component uses to lookup entry.

getClassname

public String getClassname()

Return the type of value that is stored in the context entry.

Returns:

the context entry classname

getOptional

public boolean getOptional()

Return true if entry is optional, false otherwise.

Returns:

true if entry is optional, false otherwise.

isOptional

public boolean isOptional()

Return true if entry is optional, false otherwise.

Returns:

true if entry is optional, false otherwise.

isRequired

public boolean isRequired()

Return true if entry is required, false otherwise.

Returns:

true if entry is required, false otherwise.

isVolatile

public boolean isVolatile()

Return true if entry is volotile.

Returns:

the volatile state of the entry

getVolatile

public boolean getVolatile()

Return true if entry is volotile.

Returns:

the volatile state of the entry

equals

public boolean equals(Object other)

Test is the supplied object is equal to this object.

Parameters:

other - the object to compare with this instance

Returns:

true if the object are equivalent

hashCode

public int hashCode()

Return the hashcode for the object.

Returns:

the hashcode value

compareTo

public int compareTo(Object other)

Compare this entry with another entry.

Specified by:

compareTo in interface Comparable

Parameters:

other - the other object

Returns:

the comparative index