com.opensymphony.xwork2.ognl
Class OgnlUtil

java.lang.Object
  com.opensymphony.xwork2.ognl.OgnlUtil

public class OgnlUtil
extends Object

Utility class that provides common access to the Ognl APIs for setting and getting properties from objects (usually Actions).

Author:

Jason Carreira

Field Summary

private ConcurrentHashMap<Class,BeanInfo>	beanInfoCache
private ognl.TypeConverter	defaultConverter
private ConcurrentHashMap<String,Object>	expressions
private static Logger	LOG

Constructor Summary

OgnlUtil()

Method Summary

Object	compile(String expression)
void	copy(Object from, Object to, Map context) Copies the properties in the object "from" and sets them in the object "to" using specified type converter, or XWorkConverter if none is specified.
void	copy(Object from, Object to, Map context, Collection exclusions, Collection inclusions) Copies the properties in the object "from" and sets them in the object "to" using specified type converter, or XWorkConverter if none is specified.
BeanInfo	getBeanInfo(Class clazz) Get's the java bean info for the given source.
BeanInfo	getBeanInfo(Object from) Get's the java bean info for the given source object.
Map	getBeanMap(Object source) Creates a Map with read properties for the given source object.
PropertyDescriptor[]	getPropertyDescriptors(Class clazz) Get's the java beans property descriptors for the given class.
PropertyDescriptor[]	getPropertyDescriptors(Object source) Get's the java beans property descriptors for the given source.
Object	getRealTarget(String property, Map context, Object root) Looks for the real target with the specified property given a root Object which may be a CompoundRoot.
(package private) ognl.TypeConverter	getTypeConverterFromContext(Map context)
Object	getValue(String name, Map context, Object root)
Object	getValue(String name, Map context, Object root, Class resultType)
(package private) void	internalSetProperty(String name, Object value, Object o, Map context, boolean throwPropertyExceptions)
void	setProperties(Map properties, Object o) Sets the properties on the object using the default context, defaulting to not throwing exceptions for problems setting the properties.
void	setProperties(Map properties, Object o, boolean throwPropertyExceptions) Sets the properties on the object using the default context.
void	setProperties(Map props, Object o, Map context) Sets the object's properties using the default type converter, defaulting to not throw exceptions for problems setting the properties.
void	setProperties(Map props, Object o, Map context, boolean throwPropertyExceptions) Sets the object's properties using the default type converter.
void	setProperty(String name, Object value, Object o, Map context) Sets the named property to the supplied value on the Object, defaults to not throwing property exceptions.
void	setProperty(String name, Object value, Object o, Map context, boolean throwPropertyExceptions) Sets the named property to the supplied value on the Object.
void	setValue(String name, Map context, Object root, Object value) Wrapper around Ognl.setValue() to handle type conversion for collection elements.
void	setXWorkConverter(XWorkConverter conv)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final Logger LOG

expressions

private ConcurrentHashMap<String,Object> expressions

beanInfoCache

private ConcurrentHashMap<Class,BeanInfo> beanInfoCache

defaultConverter

private ognl.TypeConverter defaultConverter

Constructor Detail

OgnlUtil

public OgnlUtil()

Method Detail

setXWorkConverter

public void setXWorkConverter(XWorkConverter conv)

setProperties

public void setProperties(Map props,
                          Object o,
                          Map context)

Sets the object's properties using the default type converter, defaulting to not throw exceptions for problems setting the properties.

Parameters:

props - the properties being set

o - the object

context - the action context

setProperties

public void setProperties(Map props,
                          Object o,
                          Map context,
                          boolean throwPropertyExceptions)

Sets the object's properties using the default type converter.

Parameters:

props - the properties being set

o - the object

context - the action context

throwPropertyExceptions - boolean which tells whether it should throw exceptions for problems setting the properties

setProperties

public void setProperties(Map properties,
                          Object o)

Sets the properties on the object using the default context, defaulting to not throwing exceptions for problems setting the properties.

Parameters:

properties -

o -

setProperties

public void setProperties(Map properties,
                          Object o,
                          boolean throwPropertyExceptions)

Sets the properties on the object using the default context.

Parameters:

properties - the property map to set on the object

o - the object to set the properties into

throwPropertyExceptions - boolean which tells whether it should throw exceptions for problems setting the properties

setProperty

public void setProperty(String name,
                        Object value,
                        Object o,
                        Map context)

Sets the named property to the supplied value on the Object, defaults to not throwing property exceptions.

Parameters:

name - the name of the property to be set

value - the value to set into the named property

o - the object upon which to set the property

context - the context which may include the TypeConverter

setProperty

public void setProperty(String name,
                        Object value,
                        Object o,
                        Map context,
                        boolean throwPropertyExceptions)

Sets the named property to the supplied value on the Object.

Parameters:

name - the name of the property to be set

value - the value to set into the named property

o - the object upon which to set the property

context - the context which may include the TypeConverter

throwPropertyExceptions - boolean which tells whether it should throw exceptions for problems setting the property

getRealTarget

public Object getRealTarget(String property,
                            Map context,
                            Object root)
                     throws ognl.OgnlException

Looks for the real target with the specified property given a root Object which may be a CompoundRoot.

Returns:

the real target or null if no object can be found with the specified property

Throws:

ognl.OgnlException

setValue

public void setValue(String name,
                     Map context,
                     Object root,
                     Object value)
              throws ognl.OgnlException

Wrapper around Ognl.setValue() to handle type conversion for collection elements. Ideally, this should be handled by OGNL directly.

Throws:

ognl.OgnlException

getValue

public Object getValue(String name,
                       Map context,
                       Object root)
                throws ognl.OgnlException

Throws:

ognl.OgnlException

getValue

public Object getValue(String name,
                       Map context,
                       Object root,
                       Class resultType)
                throws ognl.OgnlException

Throws:

ognl.OgnlException

compile

public Object compile(String expression)
               throws ognl.OgnlException

Throws:

ognl.OgnlException

copy

public void copy(Object from,
                 Object to,
                 Map context,
                 Collection exclusions,
                 Collection inclusions)

Copies the properties in the object "from" and sets them in the object "to" using specified type converter, or XWorkConverter if none is specified.

Parameters:

from - the source object

to - the target object

context - the action context we're running under

exclusions - collection of method names to excluded from copying ( can be null)

inclusions - collection of method names to included copying (can be null) note if exclusions AND inclusions are supplied and not null nothing will get copied.

copy

public void copy(Object from,
                 Object to,
                 Map context)

Copies the properties in the object "from" and sets them in the object "to" using specified type converter, or XWorkConverter if none is specified.

Parameters:

from - the source object

to - the target object

context - the action context we're running under

getPropertyDescriptors

public PropertyDescriptor[] getPropertyDescriptors(Object source)
                                            throws IntrospectionException

Get's the java beans property descriptors for the given source.

Parameters:

source - the source object.

Returns:

property descriptors.

Throws:

IntrospectionException - is thrown if an exception occurs during introspection.

getPropertyDescriptors

public PropertyDescriptor[] getPropertyDescriptors(Class clazz)
                                            throws IntrospectionException

Get's the java beans property descriptors for the given class.

Parameters:

clazz - the source object.

Returns:

property descriptors.

Throws:

IntrospectionException - is thrown if an exception occurs during introspection.

getBeanMap

public Map getBeanMap(Object source)
               throws IntrospectionException,
                      ognl.OgnlException

Creates a Map with read properties for the given source object.

If the source object does not have a read property (i.e. write-only) then the property is added to the map with the value here is no read method for property-name.

Parameters:

source - the source object.

Returns:

a Map with (key = read property name, value = value of read property).

Throws:

IntrospectionException - is thrown if an exception occurs during introspection.

ognl.OgnlException - is thrown by OGNL if the property value could not be retrieved

getBeanInfo

public BeanInfo getBeanInfo(Object from)
                     throws IntrospectionException

Get's the java bean info for the given source object. Calls getBeanInfo(Class c).

Parameters:

from - the source object.

Returns:

java bean info.

Throws:

IntrospectionException - is thrown if an exception occurs during introspection.

getBeanInfo

public BeanInfo getBeanInfo(Class clazz)
                     throws IntrospectionException

Get's the java bean info for the given source.

Parameters:

clazz - the source class.

Returns:

java bean info.

Throws:

IntrospectionException - is thrown if an exception occurs during introspection.

internalSetProperty

void internalSetProperty(String name,
                         Object value,
                         Object o,
                         Map context,
                         boolean throwPropertyExceptions)

getTypeConverterFromContext

ognl.TypeConverter getTypeConverterFromContext(Map context)