com.asakusafw.yaess.bootstrap

Class CommandLineUtil

java.lang.Object

com.asakusafw.yaess.bootstrap.CommandLineUtil

public final class CommandLineUtil
extends Object

Utilities for command line interfaces.

Since:

0.2.3

Version:

0.8.0

Field Summary

Fields

Modifier and Type	Field and Description
static String	LOG_CONTEXT_PREFIX Prefix of system properties used for log context.
static String	SCHEME_CLASSPATH The scheme name of Java class path.

Method Summary

Modifier and Type	Method and Description
static ClassLoader	buildPluginLoader(ClassLoader parent, List<File> files) Creates a class loader for loading plug-ins.
static List<Extension>	loadExtensions(ClassLoader classLoader, List<ExtendedArgument> arguments) Loads extensions from extended arguments.
static Properties	loadProperties(File path) Loads properties from the specified file.
static List<File>	parseFileList(String fileListOrNull) Parses a string of file list separated by the platform dependent path separator.
static void	prepareLogContext() Prepares log context.

Methods inherited from class java.lang.Object

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

Field Detail

LOG_CONTEXT_PREFIX

public static final String LOG_CONTEXT_PREFIX

Prefix of system properties used for log context.

See Also:

Constant Field Values

SCHEME_CLASSPATH

public static final String SCHEME_CLASSPATH

The scheme name of Java class path.

See Also:

Constant Field Values

Method Detail

prepareLogContext

public static void prepareLogContext()

Prepares log context. If current system properties contain keys with a special prefix (described in LOG_CONTEXT_PREFIX), then this method will put each key-value pairs into log MDC.

loadProperties

public static Properties loadProperties(File path)
                                 throws IOException

Loads properties from the specified file.

Parameters:

path - path to the target properties

Returns:

the loaded properties

Throws:

IOException - if failed to load the properties

IllegalArgumentException - if any parameter is null

parseFileList

public static List<File> parseFileList(String fileListOrNull)

Parses a string of file list separated by the platform dependent path separator.

Parameters:

fileListOrNull - target string, or null

Returns:

the represented file list, or an empty list if not specified

buildPluginLoader

public static ClassLoader buildPluginLoader(ClassLoader parent,
                                            List<File> files)

Creates a class loader for loading plug-ins.

Parameters:

parent - parent class loader, or null to use the system class loader

files - plug-in class paths (*.jar file or class path directory)

Returns:

the created class loader

Throws:

IllegalArgumentException - if some parameters were null

loadExtensions

public static List<Extension> loadExtensions(ClassLoader classLoader,
                                             List<ExtendedArgument> arguments)

Loads extensions from extended arguments.

Parameters:

classLoader - the extension class loader

arguments - the target arguments

Returns:

the loaded extensions

Throws:

IllegalArgumentException - if extensions are something wrong