org.apache.solr.util

Class FindClasses

java.lang.Object

org.apache.solr.util.FindClasses

class FindClasses
extends java.lang.Object

Takes in a clazz name and a jar and finds all classes in that jar that extend clazz.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.ClassLoader	cl
private java.util.jar.JarFile[]	jarFiles

Constructor Summary

Constructors

Constructor and Description
FindClasses(java.io.File... jars)

Method Summary

Modifier and Type	Method and Description
java.util.Collection<java.lang.Class>	findExtends(java.lang.Class<?> clazz) Find useful concrete (ie: not anonymous, not abstract, not an interface) classes that extend clazz
java.util.Map<java.lang.Class,java.lang.Class>	findMethodReturns(java.util.Collection<java.lang.Class> clazzes, java.lang.String methodName, java.lang.Class... parameterTypes) Given a collection of classes, returns a Map containing the subset of those classes that impliment the method specified, where the value in the map is the return type of the method
java.lang.ClassLoader	getClassLoader() returns a class loader that includes the jar used to construct this instance
static void	main(java.lang.String[] args) Simple command line test method

Methods inherited from class java.lang.Object

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

Field Detail

jarFiles

private java.util.jar.JarFile[] jarFiles

cl

private java.lang.ClassLoader cl

Constructor Detail

FindClasses

public FindClasses(java.io.File... jars)
            throws java.io.IOException

Throws:

java.io.IOException

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.lang.ClassNotFoundException,
                        java.io.IOException,
                        java.lang.NoSuchMethodException

Simple command line test method

Throws:

java.lang.ClassNotFoundException

java.io.IOException

java.lang.NoSuchMethodException

getClassLoader

public java.lang.ClassLoader getClassLoader()

returns a class loader that includes the jar used to construct this instance

findExtends

public java.util.Collection<java.lang.Class> findExtends(java.lang.Class<?> clazz)
                                                  throws java.lang.ClassNotFoundException

Find useful concrete (ie: not anonymous, not abstract, not an interface) classes that extend clazz

Throws:

java.lang.ClassNotFoundException

findMethodReturns

public java.util.Map<java.lang.Class,java.lang.Class> findMethodReturns(java.util.Collection<java.lang.Class> clazzes,
                                                                        java.lang.String methodName,
                                                                        java.lang.Class... parameterTypes)
                                                                 throws java.lang.NoSuchMethodException

Given a collection of classes, returns a Map containing the subset of those classes that impliment the method specified, where the value in the map is the return type of the method

Throws:

java.lang.NoSuchMethodException