org.springframework.core.io

Class ClassPathResource

java.lang.Object

org.springframework.core.io.AbstractResource

org.springframework.core.io.AbstractFileResolvingResource

org.springframework.core.io.ClassPathResource

All Implemented Interfaces:

InputStreamSource, Resource

Direct Known Subclasses:

ClassRelativeResourceLoader.ClassRelativeContextResource, DefaultResourceLoader.ClassPathContextResource

public class ClassPathResource
extends AbstractFileResolvingResource

Resource implementation for class path resources. Uses either a given ClassLoader or a given Class for loading resources.

Supports resolution as java.io.File if the class path resource resides in the file system, but not for resources in a JAR. Always supports resolution as URL.

Since:

28.12.2003

Author:

Juergen Hoeller, Sam Brannen

See Also:

ClassLoader.getResourceAsStream(String), Class.getResourceAsStream(String)

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.ClassLoader	classLoader
private java.lang.Class<?>	clazz
private java.lang.String	path

Constructor Summary

Constructors

Modifier	Constructor and Description
	ClassPathResource(java.lang.String path) Create a new ClassPathResource for ClassLoader usage.
	ClassPathResource(java.lang.String path, java.lang.Class<?> clazz) Create a new ClassPathResource for Class usage.
	ClassPathResource(java.lang.String path, java.lang.ClassLoader classLoader) Create a new ClassPathResource for ClassLoader usage.
protected	ClassPathResource(java.lang.String path, java.lang.ClassLoader classLoader, java.lang.Class<?> clazz) Create a new ClassPathResource with optional ClassLoader and Class.

Method Summary

Modifier and Type	Method and Description
Resource	createRelative(java.lang.String relativePath) This implementation creates a ClassPathResource, applying the given path relative to the path of the underlying resource of this descriptor.
boolean	equals(java.lang.Object obj) This implementation compares the underlying class path locations.
boolean	exists() This implementation checks for the resolution of a resource URL.
java.lang.ClassLoader	getClassLoader() Return the ClassLoader that this resource will be obtained from.
java.lang.String	getDescription() This implementation returns a description that includes the class path location.
java.lang.String	getFilename() This implementation returns the name of the file that this class path resource refers to.
java.io.InputStream	getInputStream() This implementation opens an InputStream for the given class path resource.
java.lang.String	getPath() Return the path for this resource (as resource path within the class path).
java.net.URL	getURL() This implementation returns a URL for the underlying class path resource, if available.
int	hashCode() This implementation returns the hash code of the underlying class path location.
protected java.net.URL	resolveURL() Resolves a URL for the underlying class path resource.

Methods inherited from class org.springframework.core.io.AbstractFileResolvingResource

contentLength, customizeConnection, customizeConnection, getFile, getFile, getFileForLastModifiedCheck, isReadable, lastModified

Methods inherited from class org.springframework.core.io.AbstractResource

getURI, isOpen, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

path

private final java.lang.String path

classLoader

private java.lang.ClassLoader classLoader

clazz

private java.lang.Class<?> clazz

Constructor Detail

ClassPathResource

public ClassPathResource(java.lang.String path)

Create a new ClassPathResource for ClassLoader usage. A leading slash will be removed, as the ClassLoader resource access methods will not accept it.

The thread context class loader will be used for loading the resource.

Parameters:

path - the absolute path within the class path

See Also:

ClassLoader.getResourceAsStream(String), ClassUtils.getDefaultClassLoader()

ClassPathResource

public ClassPathResource(java.lang.String path,
                         java.lang.ClassLoader classLoader)

Create a new ClassPathResource for ClassLoader usage. A leading slash will be removed, as the ClassLoader resource access methods will not accept it.

Parameters:

path - the absolute path within the classpath

classLoader - the class loader to load the resource with, or null for the thread context class loader

See Also:

ClassLoader.getResourceAsStream(String)

ClassPathResource

public ClassPathResource(java.lang.String path,
                         java.lang.Class<?> clazz)

Create a new ClassPathResource for Class usage. The path can be relative to the given class, or absolute within the classpath via a leading slash.

Parameters:

path - relative or absolute path within the class path

clazz - the class to load resources with

See Also:

Class.getResourceAsStream(java.lang.String)

ClassPathResource

protected ClassPathResource(java.lang.String path,
                            java.lang.ClassLoader classLoader,
                            java.lang.Class<?> clazz)

Create a new ClassPathResource with optional ClassLoader and Class. Only for internal usage.

Parameters:

path - relative or absolute path within the classpath

classLoader - the class loader to load the resource with, if any

clazz - the class to load resources with, if any

Method Detail

getPath

public final java.lang.String getPath()

Return the path for this resource (as resource path within the class path).

getClassLoader

public final java.lang.ClassLoader getClassLoader()

Return the ClassLoader that this resource will be obtained from.

exists

public boolean exists()

This implementation checks for the resolution of a resource URL.

Specified by:

exists in interface Resource

Overrides:

exists in class AbstractFileResolvingResource

See Also:

ClassLoader.getResource(String), Class.getResource(String)

resolveURL

protected java.net.URL resolveURL()

Resolves a URL for the underlying class path resource.

Returns:

the resolved URL, or null if not resolvable

getInputStream

public java.io.InputStream getInputStream()
                                   throws java.io.IOException

This implementation opens an InputStream for the given class path resource.

Returns:

the input stream for the underlying resource (must not be null)

Throws:

java.io.IOException - if the stream could not be opened

See Also:

ClassLoader.getResourceAsStream(String), Class.getResourceAsStream(String)

getURL

public java.net.URL getURL()
                    throws java.io.IOException

This implementation returns a URL for the underlying class path resource, if available.

Specified by:

getURL in interface Resource

Overrides:

getURL in class AbstractResource

Throws:

java.io.IOException - if the resource cannot be resolved as URL, i.e. if the resource is not available as descriptor

See Also:

ClassLoader.getResource(String), Class.getResource(String)

createRelative

public Resource createRelative(java.lang.String relativePath)

This implementation creates a ClassPathResource, applying the given path relative to the path of the underlying resource of this descriptor.

Specified by:

createRelative in interface Resource

Overrides:

createRelative in class AbstractResource

Parameters:

relativePath - the relative path (relative to this resource)

Returns:

the resource handle for the relative resource

See Also:

StringUtils.applyRelativePath(String, String)

getFilename

public java.lang.String getFilename()

This implementation returns the name of the file that this class path resource refers to.

Specified by:

getFilename in interface Resource

Overrides:

getFilename in class AbstractResource

See Also:

StringUtils.getFilename(String)

getDescription

public java.lang.String getDescription()

This implementation returns a description that includes the class path location.

See Also:

Object.toString()

equals

public boolean equals(java.lang.Object obj)

This implementation compares the underlying class path locations.

Overrides:

equals in class AbstractResource

See Also:

Resource.getDescription()

hashCode

public int hashCode()

This implementation returns the hash code of the underlying class path location.

Overrides:

hashCode in class AbstractResource

See Also:

Resource.getDescription()