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org.apache.commons.beanutils
Class BasicDynaBean

java.lang.Object
  extended by org.apache.commons.beanutils.BasicDynaBean
All Implemented Interfaces:
Serializable, DynaBean
public class BasicDynaBean
extends Object
implements DynaBean, Serializable

Minimal implementation of the DynaBean interface. Can be used as a convenience base class for more sophisticated implementations.

IMPLEMENTATION NOTE - Instances of this class that are accessed from multiple threads simultaneously need to be synchronized.

IMPLEMENTATION NOTE - Instances of this class can be successfully serialized and deserialized ONLY if all property values are Serializable.

Version:
$Revision: 690380 $ $Date: 2008-08-29 21:04:38 +0100 (Fri, 29 Aug 2008) $
Author:
Craig McClanahan
See Also:
Serialized Form

Field Summary
protected  DynaClass dynaClass
          The DynaClass "base class" that this DynaBean is associated with.
protected  HashMap values
          The set of property values for this DynaBean, keyed by property name.
 
Constructor Summary
BasicDynaBean(DynaClass dynaClass)
          Construct a new DynaBean associated with the specified DynaClass instance.
 
Method Summary
 boolean contains(String name, String key)
          Does the specified mapped property contain a value for the specified key value?
 Object get(String name)
          Return the value of a simple property with the specified name.
 Object get(String name, int index)
          Return the value of an indexed property with the specified name.
 Object get(String name, String key)
          Return the value of a mapped property with the specified name, or null if there is no value for the specified key.
 DynaClass getDynaClass()
          Return the DynaClass instance that describes the set of properties available for this DynaBean.
protected  DynaProperty getDynaProperty(String name)
          Return the property descriptor for the specified property name.
 Map getMap()
          Return a Map representation of this DynaBean.
protected  boolean isAssignable(Class dest, Class source)
          Is an object of the source class assignable to the destination class?
 void remove(String name, String key)
          Remove any existing value for the specified key on the specified mapped property.
 void set(String name, int index, Object value)
          Set the value of an indexed property with the specified name.
 void set(String name, Object value)
          Set the value of a simple property with the specified name.
 void set(String name, String key, Object value)
          Set the value of a mapped property with the specified name.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

dynaClass

protected DynaClass dynaClass
The DynaClass "base class" that this DynaBean is associated with.

values

protected HashMap values
The set of property values for this DynaBean, keyed by property name.

Constructor Detail

BasicDynaBean

public BasicDynaBean(DynaClass dynaClass)
Construct a new DynaBean associated with the specified DynaClass instance.

Parameters:
dynaClass - The DynaClass we are associated with
Method Detail

getMap

public Map getMap()
Return a Map representation of this DynaBean.

This, for example, could be used in JSTL in the following way to access a DynaBean's fooProperty:

Returns:
a Map representation of this DynaBean
Since:
1.8.0

contains

public boolean contains(String name,
                        String key)
Does the specified mapped property contain a value for the specified key value?

Specified by:
contains in interface DynaBean
Parameters:
name - Name of the property to check
key - Name of the key to check
Returns:
true if the mapped property contains a value for the specified key, otherwise false
Throws:
IllegalArgumentException - if there is no property of the specified name

get

public Object get(String name)
Return the value of a simple property with the specified name.

Specified by:
get in interface DynaBean
Parameters:
name - Name of the property whose value is to be retrieved
Returns:
The property's value
Throws:
IllegalArgumentException - if there is no property of the specified name

get

public Object get(String name,
                  int index)
Return the value of an indexed property with the specified name.

Specified by:
get in interface DynaBean
Parameters:
name - Name of the property whose value is to be retrieved
index - Index of the value to be retrieved
Returns:
The indexed property's value
Throws:
IllegalArgumentException - if there is no property of the specified name
IllegalArgumentException - if the specified property exists, but is not indexed
IndexOutOfBoundsException - if the specified index is outside the range of the underlying property
NullPointerException - if no array or List has been initialized for this property

get

public Object get(String name,
                  String key)
Return the value of a mapped property with the specified name, or null if there is no value for the specified key.

Specified by:
get in interface DynaBean
Parameters:
name - Name of the property whose value is to be retrieved
key - Key of the value to be retrieved
Returns:
The mapped property's value
Throws:
IllegalArgumentException - if there is no property of the specified name
IllegalArgumentException - if the specified property exists, but is not mapped

getDynaClass

public DynaClass getDynaClass()
Return the DynaClass instance that describes the set of properties available for this DynaBean.

Specified by:
getDynaClass in interface DynaBean
Returns:
The associated DynaClass

remove

public void remove(String name,
                   String key)
Remove any existing value for the specified key on the specified mapped property.

Specified by:
remove in interface DynaBean
Parameters:
name - Name of the property for which a value is to be removed
key - Key of the value to be removed
Throws:
IllegalArgumentException - if there is no property of the specified name

set

public void set(String name,
                Object value)
Set the value of a simple property with the specified name.

Specified by:
set in interface DynaBean
Parameters:
name - Name of the property whose value is to be set
value - Value to which this property is to be set
Throws:
ConversionException - if the specified value cannot be converted to the type required for this property
IllegalArgumentException - if there is no property of the specified name
NullPointerException - if an attempt is made to set a primitive property to null

set

public void set(String name,
                int index,
                Object value)
Set the value of an indexed property with the specified name.

Specified by:
set in interface DynaBean
Parameters:
name - Name of the property whose value is to be set
index - Index of the property to be set
value - Value to which this property is to be set
Throws:
ConversionException - if the specified value cannot be converted to the type required for this property
IllegalArgumentException - if there is no property of the specified name
IllegalArgumentException - if the specified property exists, but is not indexed
IndexOutOfBoundsException - if the specified index is outside the range of the underlying property

set

public void set(String name,
                String key,
                Object value)
Set the value of a mapped property with the specified name.

Specified by:
set in interface DynaBean
Parameters:
name - Name of the property whose value is to be set
key - Key of the property to be set
value - Value to which this property is to be set
Throws:
ConversionException - if the specified value cannot be converted to the type required for this property
IllegalArgumentException - if there is no property of the specified name
IllegalArgumentException - if the specified property exists, but is not mapped

getDynaProperty

protected DynaProperty getDynaProperty(String name)
Return the property descriptor for the specified property name.

Parameters:
name - Name of the property for which to retrieve the descriptor
Returns:
The property descriptor
Throws:
IllegalArgumentException - if this is not a valid property name for our DynaClass

isAssignable

protected boolean isAssignable(Class dest,
                               Class source)
Is an object of the source class assignable to the destination class?

Parameters:
dest - Destination class
source - Source class
Returns:
true if the source class is assignable to the destination class, otherwise false
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