Class ClasspathResource

java.lang.Object

org.apache.xmlgraphics.util.ClasspathResource

public final class ClasspathResource
extends Object

A class to find resources in the classpath by their mime-type specified in the MANIFEST.

This class searches for content entries in all META-INF/MANIFEST.MF files. It will find files with a given Content-Type: attribute. This allows to add arbitrary resources by content-type just by creating a JAR wrapper and adding them to the classpath.

Example:

Name: test.txt
Content-Type: text/plain

Field Summary

Fields

Modifier and Type	Field	Description
private static ClasspathResource	classpathResource
private static final String	CONTENT_TYPE_KEY
private final Map	contentMappings	Actual Type: Map<String,List<URL>>.
private static final String	MANIFEST_PATH

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ClasspathResource()

Method Summary

Modifier and Type	Method	Description
private void	addToMapping(String contentType, String name, ClassLoader classLoader)
private Set	getClassLoadersForResources()
static ClasspathResource	getInstance()	Retrieve the singleton instance of this class.
List	listResourcesOfMimeType(String mimeType)	Retrieve a list of resources known to have the given mime-type.
private void	loadManifests()

Methods inherited from class Object

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

Field Details

contentMappings

private final Map contentMappings

Actual Type: Map<String,List<URL>>.

MANIFEST_PATH

private static final String MANIFEST_PATH

See Also:

• Constant Field Values

CONTENT_TYPE_KEY

private static final String CONTENT_TYPE_KEY

See Also:

• Constant Field Values

classpathResource

private static ClasspathResource classpathResource

Constructor Details

ClasspathResource

private ClasspathResource()

Method Details

getInstance

public static ClasspathResource getInstance()

Retrieve the singleton instance of this class.

Returns:

the ClassPathResource instance.

getClassLoadersForResources

private Set getClassLoadersForResources()

loadManifests

private void loadManifests()

addToMapping

private void addToMapping(String contentType,
 String name,
 ClassLoader classLoader)

listResourcesOfMimeType

public List listResourcesOfMimeType(String mimeType)

Retrieve a list of resources known to have the given mime-type.

Parameters:

mimeType - the mime-type to search for.

Returns:

a List<URL>, guaranteed to be != null.