org.springframework.boot.loader.tools

Class MainClassFinder

java.lang.Object

org.springframework.boot.loader.tools.MainClassFinder

public abstract class MainClassFinder
extends Object

Finds any class with a public static main method by performing a breadth first search.

Since:

1.0.0

Author:

Phillip Webb, Andy Wilkinson

Constructor Summary

Constructors

Constructor and Description
MainClassFinder()

Method Summary

Modifier and Type	Method and Description
static String	findMainClass(File rootFolder) Find the main class from a given folder.
static String	findMainClass(JarFile jarFile, String classesLocation) Find the main class in a given jar file.
static String	findSingleMainClass(File rootFolder) Find a single main class from the given rootFolder.
static String	findSingleMainClass(File rootFolder, String annotationName) Find a single main class from the given rootFolder.
static String	findSingleMainClass(JarFile jarFile, String classesLocation) Find a single main class in a given jar file.
static String	findSingleMainClass(JarFile jarFile, String classesLocation, String annotationName) Find a single main class in a given jar file.

Methods inherited from class java.lang.Object

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

Constructor Detail

MainClassFinder

public MainClassFinder()

Method Detail

findMainClass

public static String findMainClass(File rootFolder)
                            throws IOException

Find the main class from a given folder.

Parameters:

rootFolder - the root folder to search

Returns:

the main class or null

Throws:

IOException - if the folder cannot be read

findSingleMainClass

public static String findSingleMainClass(File rootFolder)
                                  throws IOException

Find a single main class from the given rootFolder.

Parameters:

rootFolder - the root folder to search

Returns:

the main class or null

Throws:

IOException - if the folder cannot be read

findSingleMainClass

public static String findSingleMainClass(File rootFolder,
                                         String annotationName)
                                  throws IOException

Find a single main class from the given rootFolder. A main class annotated with an annotation with the given annotationName will be preferred over a main class with no such annotation.

Parameters:

rootFolder - the root folder to search

annotationName - the name of the annotation that may be present on the main class

Returns:

the main class or null

Throws:

IOException - if the folder cannot be read

findMainClass

public static String findMainClass(JarFile jarFile,
                                   String classesLocation)
                            throws IOException

Find the main class in a given jar file.

Parameters:

jarFile - the jar file to search

classesLocation - the location within the jar containing classes

Returns:

the main class or null

Throws:

IOException - if the jar file cannot be read

findSingleMainClass

public static String findSingleMainClass(JarFile jarFile,
                                         String classesLocation)
                                  throws IOException

Find a single main class in a given jar file.

Parameters:

jarFile - the jar file to search

classesLocation - the location within the jar containing classes

Returns:

the main class or null

Throws:

IOException - if the jar file cannot be read

findSingleMainClass

public static String findSingleMainClass(JarFile jarFile,
                                         String classesLocation,
                                         String annotationName)
                                  throws IOException

Find a single main class in a given jar file. A main class annotated with an annotation with the given annotationName will be preferred over a main class with no such annotation.

Parameters:

jarFile - the jar file to search

classesLocation - the location within the jar containing classes

annotationName - the name of the annotation that may be present on the main class

Returns:

the main class or null

Throws:

IOException - if the jar file cannot be read