Package net.sf.jasperreports.engine.util

Class ClassUtils

java.lang.Object

net.sf.jasperreports.engine.util.ClassUtils

public final class ClassUtils
extends Object

Class utilities.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EXCEPTION_MESSAGE_KEY_CLASS_INSTANCE_ERROR
static final String	EXCEPTION_MESSAGE_KEY_CLASS_LOADING_ERROR
static final String	EXCEPTION_MESSAGE_KEY_CLASS_UNEXPECTED_TYPE

Method Summary

Modifier and Type	Method	Description
static List<Class<?>>	getInterfaces(Class<?> clazz)
static final Object	instantiateClass(String className, Class<?> expectedType)	Instantiates a class.

Methods inherited from class java.lang.Object

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

Field Details

EXCEPTION_MESSAGE_KEY_CLASS_INSTANCE_ERROR

public static final String EXCEPTION_MESSAGE_KEY_CLASS_INSTANCE_ERROR

See Also:

• Constant Field Values

EXCEPTION_MESSAGE_KEY_CLASS_LOADING_ERROR

public static final String EXCEPTION_MESSAGE_KEY_CLASS_LOADING_ERROR

See Also:

• Constant Field Values

EXCEPTION_MESSAGE_KEY_CLASS_UNEXPECTED_TYPE

public static final String EXCEPTION_MESSAGE_KEY_CLASS_UNEXPECTED_TYPE

See Also:

• Constant Field Values

Method Details

instantiateClass

public static final Object instantiateClass(String className,
 Class<?> expectedType)

Instantiates a class.

The class is expected to have a public no-argument constructor.

Parameters:

className - the class name

expectedType - the expected (super) type of the result

Returns:

a newly created instance of the specified class

Throws:

JRRuntimeException - if the class cannot be loaded or instantiated, or if it does not implement the expected type

getInterfaces

public static List<Class<?>> getInterfaces(Class<?> clazz)

Parameters:

clazz -

Returns:

a list of interfaces implemented by this class and by its superclasses, or an empty list in case there are no implemented interfaces