org.apache.commons.beanutils

Class BeanUtils

java.lang.Object

org.apache.commons.beanutils.BeanUtils

Direct Known Subclasses:

LocaleBeanUtils

public class BeanUtils
extends Object

Utility methods for populating JavaBeans properties via reflection.

The implementations are provided by BeanUtilsBean. These static utility methods use the default instance. More sophisticated behaviour can be provided by using a BeanUtilsBean instance.

Version:

$Id$

See Also:

BeanUtilsBean

Constructor Summary

Constructors

Constructor and Description
BeanUtils()

Method Summary

Modifier and Type	Method and Description
static Object	cloneBean(Object bean) Clone a bean based on the available property getters and setters, even if the bean class itself does not implement Cloneable.
static void	copyProperties(Object dest, Object orig) Copy property values from the origin bean to the destination bean for all cases where the property names are the same.
static void	copyProperty(Object bean, String name, Object value) Copy the specified property value to the specified destination bean, performing any type conversion that is required.
static <K,V> Map<K,V>	createCache() Create a cache.
static Map<String,String>	describe(Object bean) Return the entire set of properties for which the specified bean provides a read method.
static String[]	getArrayProperty(Object bean, String name) Return the value of the specified array property of the specified bean, as a String array.
static boolean	getCacheFast(Map<?,?> map) Return whether a Map is fast
static int	getDebug() Deprecated. BeanUtils now uses commons-logging for all log messages. Use your favorite logging tool to configure logging for this class.
static String	getIndexedProperty(Object bean, String name) Return the value of the specified indexed property of the specified bean, as a String.
static String	getIndexedProperty(Object bean, String name, int index) Return the value of the specified indexed property of the specified bean, as a String.
static String	getMappedProperty(Object bean, String name) Return the value of the specified indexed property of the specified bean, as a String.
static String	getMappedProperty(Object bean, String name, String key) Return the value of the specified mapped property of the specified bean, as a String.
static String	getNestedProperty(Object bean, String name) Return the value of the (possibly nested) property of the specified name, for the specified bean, as a String.
static String	getProperty(Object bean, String name) Return the value of the specified property of the specified bean, no matter which property reference format is used, as a String.
static String	getSimpleProperty(Object bean, String name) Return the value of the specified simple property of the specified bean, converted to a String.
static boolean	initCause(Throwable throwable, Throwable cause) If we're running on JDK 1.4 or later, initialize the cause for the given throwable.
static void	populate(Object bean, Map<String,? extends Object> properties) Populate the JavaBeans properties of the specified bean, based on the specified name/value pairs.
static void	setCacheFast(Map<?,?> map, boolean fast) Set whether fast on a Map
static void	setDebug(int newDebug) Deprecated. BeanUtils now uses commons-logging for all log messages. Use your favorite logging tool to configure logging for this class.
static void	setProperty(Object bean, String name, Object value) Set the specified property value, performing type conversions as required to conform to the type of the destination property.

Methods inherited from class java.lang.Object

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

Constructor Detail

BeanUtils

public BeanUtils()

Method Detail

getDebug

@Deprecated
public static int getDebug()

Deprecated. BeanUtils now uses commons-logging for all log messages. Use your favorite logging tool to configure logging for this class.

The debug static property is no longer used

Returns:

debug property

setDebug

@Deprecated
public static void setDebug(int newDebug)

Deprecated. BeanUtils now uses commons-logging for all log messages. Use your favorite logging tool to configure logging for this class.

The debug static property is no longer used

Parameters:

newDebug - debug property

cloneBean

public static Object cloneBean(Object bean)
                        throws IllegalAccessException,
                               InstantiationException,
                               InvocationTargetException,
                               NoSuchMethodException

Clone a bean based on the available property getters and setters, even if the bean class itself does not implement Cloneable.

For more details see BeanUtilsBean.

Parameters:

bean - Bean to be cloned

Returns:

the cloned bean

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InstantiationException - if a new instance of the bean's class cannot be instantiated

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.cloneBean(java.lang.Object)

copyProperties

public static void copyProperties(Object dest,
                                  Object orig)
                           throws IllegalAccessException,
                                  InvocationTargetException

Copy property values from the origin bean to the destination bean for all cases where the property names are the same.

For more details see BeanUtilsBean.

Parameters:

dest - Destination bean whose properties are modified

orig - Origin bean whose properties are retrieved

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

IllegalArgumentException - if the dest or orig argument is null or if the dest property type is different from the source type and the relevant converter has not been registered.

InvocationTargetException - if the property accessor method throws an exception

See Also:

BeanUtilsBean.copyProperties(java.lang.Object, java.lang.Object)

copyProperty

public static void copyProperty(Object bean,
                                String name,
                                Object value)
                         throws IllegalAccessException,
                                InvocationTargetException

Copy the specified property value to the specified destination bean, performing any type conversion that is required.

For more details see BeanUtilsBean.

Parameters:

bean - Bean on which setting is to be performed

name - Property name (can be nested/indexed/mapped/combo)

value - Value to be set

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

See Also:

BeanUtilsBean.copyProperty(java.lang.Object, java.lang.String, java.lang.Object)

describe

public static Map<String,String> describe(Object bean)
                                   throws IllegalAccessException,
                                          InvocationTargetException,
                                          NoSuchMethodException

Return the entire set of properties for which the specified bean provides a read method.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose properties are to be extracted

Returns:

Map of property descriptors

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.describe(java.lang.Object)

getArrayProperty

public static String[] getArrayProperty(Object bean,
                                        String name)
                                 throws IllegalAccessException,
                                        InvocationTargetException,
                                        NoSuchMethodException

Return the value of the specified array property of the specified bean, as a String array.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - Name of the property to be extracted

Returns:

The array property value

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getArrayProperty(java.lang.Object, java.lang.String)

getIndexedProperty

public static String getIndexedProperty(Object bean,
                                        String name)
                                 throws IllegalAccessException,
                                        InvocationTargetException,
                                        NoSuchMethodException

Return the value of the specified indexed property of the specified bean, as a String.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - propertyname[index] of the property value to be extracted

Returns:

The indexed property's value, converted to a String

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getIndexedProperty(Object, String)

getIndexedProperty

public static String getIndexedProperty(Object bean,
                                        String name,
                                        int index)
                                 throws IllegalAccessException,
                                        InvocationTargetException,
                                        NoSuchMethodException

Return the value of the specified indexed property of the specified bean, as a String. The index is specified as a method parameter and must *not* be included in the property name expression

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - Simple property name of the property value to be extracted

index - Index of the property value to be extracted

Returns:

The indexed property's value, converted to a String

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getIndexedProperty(Object, String, int)

getMappedProperty

public static String getMappedProperty(Object bean,
                                       String name)
                                throws IllegalAccessException,
                                       InvocationTargetException,
                                       NoSuchMethodException

Return the value of the specified indexed property of the specified bean, as a String.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - propertyname(index) of the property value to be extracted

Returns:

The mapped property's value, converted to a String

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getMappedProperty(Object, String)

getMappedProperty

public static String getMappedProperty(Object bean,
                                       String name,
                                       String key)
                                throws IllegalAccessException,
                                       InvocationTargetException,
                                       NoSuchMethodException

Return the value of the specified mapped property of the specified bean, as a String.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - Simple property name of the property value to be extracted

key - Lookup key of the property value to be extracted

Returns:

The mapped property's value, converted to a String

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getMappedProperty(Object, String, String)

getNestedProperty

public static String getNestedProperty(Object bean,
                                       String name)
                                throws IllegalAccessException,
                                       InvocationTargetException,
                                       NoSuchMethodException

Return the value of the (possibly nested) property of the specified name, for the specified bean, as a String.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - Possibly nested name of the property to be extracted

Returns:

The nested property's value, converted to a String

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

IllegalArgumentException - if a nested reference to a property returns null

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getNestedProperty(java.lang.Object, java.lang.String)

getProperty

public static String getProperty(Object bean,
                                 String name)
                          throws IllegalAccessException,
                                 InvocationTargetException,
                                 NoSuchMethodException

Return the value of the specified property of the specified bean, no matter which property reference format is used, as a String.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - Possibly indexed and/or nested name of the property to be extracted

Returns:

The property's value, converted to a String

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getProperty(java.lang.Object, java.lang.String)

getSimpleProperty

public static String getSimpleProperty(Object bean,
                                       String name)
                                throws IllegalAccessException,
                                       InvocationTargetException,
                                       NoSuchMethodException

Return the value of the specified simple property of the specified bean, converted to a String.

For more details see BeanUtilsBean.

Parameters:

bean - Bean whose property is to be extracted

name - Name of the property to be extracted

Returns:

The property's value, converted to a String

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

NoSuchMethodException - if an accessor method for this property cannot be found

See Also:

BeanUtilsBean.getSimpleProperty(java.lang.Object, java.lang.String)

populate

public static void populate(Object bean,
                            Map<String,? extends Object> properties)
                     throws IllegalAccessException,
                            InvocationTargetException

Populate the JavaBeans properties of the specified bean, based on the specified name/value pairs.

For more details see BeanUtilsBean.

Parameters:

bean - JavaBean whose properties are being populated

properties - Map keyed by property name, with the corresponding (String or String[]) value(s) to be set

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

See Also:

BeanUtilsBean.populate(java.lang.Object, java.util.Map<java.lang.String, ? extends java.lang.Object>)

setProperty

public static void setProperty(Object bean,
                               String name,
                               Object value)
                        throws IllegalAccessException,
                               InvocationTargetException

Set the specified property value, performing type conversions as required to conform to the type of the destination property.

For more details see BeanUtilsBean.

Parameters:

bean - Bean on which setting is to be performed

name - Property name (can be nested/indexed/mapped/combo)

value - Value to be set

Throws:

IllegalAccessException - if the caller does not have access to the property accessor method

InvocationTargetException - if the property accessor method throws an exception

See Also:

BeanUtilsBean.setProperty(java.lang.Object, java.lang.String, java.lang.Object)

initCause

public static boolean initCause(Throwable throwable,
                                Throwable cause)

If we're running on JDK 1.4 or later, initialize the cause for the given throwable.

Parameters:

throwable - The throwable.

cause - The cause of the throwable.

Returns:

true if the cause was initialized, otherwise false.

Since:

1.8.0

createCache

public static <K,V> Map<K,V> createCache()

Create a cache.

Type Parameters:

K - the key type of the cache

V - the value type of the cache

Returns:

a new cache

Since:

1.8.0

getCacheFast

public static boolean getCacheFast(Map<?,?> map)

Return whether a Map is fast

Parameters:

map - The map

Returns:

Whether it is fast or not.

Since:

1.8.0

setCacheFast

public static void setCacheFast(Map<?,?> map,
                                boolean fast)

Set whether fast on a Map

Parameters:

map - The map

fast - Whether it should be fast or not.

Since:

1.8.0