bboss.org.apache.velocity.runtime.resource.loader

类 ResourceLoader

java.lang.Object

bboss.org.apache.velocity.runtime.resource.loader.ResourceLoader

直接已知子类:

ClasspathResourceLoader, DataSourceResourceLoader, FileResourceLoader, JarResourceLoader, StringResourceLoader, URLResourceLoader

public abstract class ResourceLoader
extends java.lang.Object

This is abstract class the all text resource loaders should extend.

字段概要

字段

限定符和类型	字段和说明
protected java.lang.String	className Class name for this loader, for logging/debuggin purposes.
protected boolean	isCachingOn Does this loader want templates produced with it cached in the Runtime.
protected Log	log
protected long	modificationCheckInterval This property will be passed on to the templates that are created with this loader.
protected RuntimeServices	rsvc

构造器概要

构造器

构造器和说明
ResourceLoader()

方法概要

限定符和类型	方法和说明
void	commonInit(RuntimeServices rs, org.apache.commons.collections.ExtendedProperties configuration) This initialization is used by all resource loaders and must be called to set up common properties shared by all resource loaders
java.lang.String	getClassName() Return the class name of this resource Loader
abstract long	getLastModified(Resource resource) Get the last modified time of the InputStream source that was used to create the template.
long	getModificationCheckInterval() Get the interval at which the InputStream source should be checked for modifications.
abstract java.io.InputStream	getResourceStream(java.lang.String source) Get the InputStream that the Runtime will parse to create a template.
abstract void	init(org.apache.commons.collections.ExtendedProperties configuration) Initialize the template loader with a a resources class.
boolean	isCachingOn() The Runtime uses this to find out whether this template loader wants the Runtime to cache templates created with InputStreams provided by this loader.
abstract boolean	isSourceModified(Resource resource) Given a template, check to see if the source of InputStream has been modified.
boolean	resourceExists(java.lang.String resourceName) Check whether any given resource exists.
void	setCachingOn(boolean value) Set the caching state.
void	setModificationCheckInterval(long modificationCheckInterval) Set the interval at which the InputStream source should be checked for modifications.

从类继承的方法 java.lang.Object

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

字段详细资料

isCachingOn

protected boolean isCachingOn

Does this loader want templates produced with it cached in the Runtime.

modificationCheckInterval

protected long modificationCheckInterval

This property will be passed on to the templates that are created with this loader.

className

protected java.lang.String className

Class name for this loader, for logging/debuggin purposes.

rsvc

protected RuntimeServices rsvc

log

protected Log log

构造器详细资料

ResourceLoader

public ResourceLoader()

方法详细资料

commonInit

public void commonInit(RuntimeServices rs,
                       org.apache.commons.collections.ExtendedProperties configuration)

This initialization is used by all resource loaders and must be called to set up common properties shared by all resource loaders

参数:

rs -

configuration -

init

public abstract void init(org.apache.commons.collections.ExtendedProperties configuration)

Initialize the template loader with a a resources class.

参数:

configuration -

getResourceStream

public abstract java.io.InputStream getResourceStream(java.lang.String source)
                                               throws ResourceNotFoundException

Get the InputStream that the Runtime will parse to create a template.

参数:

source -

返回:

The input stream for the requested resource.

抛出:

ResourceNotFoundException

isSourceModified

public abstract boolean isSourceModified(Resource resource)

Given a template, check to see if the source of InputStream has been modified.

参数:

resource -

返回:

True if the resource has been modified.

getLastModified

public abstract long getLastModified(Resource resource)

Get the last modified time of the InputStream source that was used to create the template. We need the template here because we have to extract the name of the template in order to locate the InputStream source.

参数:

resource -

返回:

Time in millis when the resource has been modified.

getClassName

public java.lang.String getClassName()

Return the class name of this resource Loader

返回:

Class name of the resource loader.

setCachingOn

public void setCachingOn(boolean value)

Set the caching state. If true, then this loader would like the Runtime to cache templates that have been created with InputStreams provided by this loader.

参数:

value -

isCachingOn

public boolean isCachingOn()

The Runtime uses this to find out whether this template loader wants the Runtime to cache templates created with InputStreams provided by this loader.

返回:

True if this resource loader caches.

setModificationCheckInterval

public void setModificationCheckInterval(long modificationCheckInterval)

Set the interval at which the InputStream source should be checked for modifications.

参数:

modificationCheckInterval -

getModificationCheckInterval

public long getModificationCheckInterval()

Get the interval at which the InputStream source should be checked for modifications.

返回:

The modification check interval.

resourceExists

public boolean resourceExists(java.lang.String resourceName)

Check whether any given resource exists. This is not really a very efficient test and it can and should be overridden in the subclasses extending ResourceLoader.

参数:

resourceName - The name of a resource.

返回:

true if a resource exists and can be accessed.

从以下版本开始:

1.6