cn.sexycode.util.core.io

类 DescriptiveResource

java.lang.Object

cn.sexycode.util.core.io.AbstractResource

cn.sexycode.util.core.io.DescriptiveResource

所有已实现的接口:

InputStreamSource, Resource

public class DescriptiveResource
extends AbstractResource

Simple Resource implementation that holds a resource description but does not point to an actually readable resource.

To be used as placeholder if a Resource argument is expected by an API but not necessarily used for actual reading.

从以下版本开始:

1.2.6

作者:

Juergen Hoeller

构造器概要

构造器

构造器和说明
DescriptiveResource(String description) Create a new DescriptiveResource.

方法概要

限定符和类型	方法和说明
boolean	equals(Object other) This implementation compares the underlying description String.
boolean	exists() This implementation checks whether a File can be opened, falling back to whether an InputStream can be opened.
String	getDescription() Return a description for this resource, to be used for error output when working with the resource.
InputStream	getInputStream() Return an InputStream for the content of an underlying resource.
int	hashCode() This implementation returns the hash code of the underlying description String.
boolean	isReadable() This implementation always returns true for a resource that exists (revised as of 5.1).

从类继承的方法 cn.sexycode.util.core.io.AbstractResource

contentLength, createRelative, getFile, getFileForLastModifiedCheck, getFilename, getURI, getURL, isFile, isOpen, lastModified, readableChannel, toString

从类继承的方法 java.lang.Object

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

构造器详细资料

DescriptiveResource

public DescriptiveResource(String description)

Create a new DescriptiveResource.

参数:

description - the resource description

方法详细资料

exists

public boolean exists()

从类复制的说明: AbstractResource

This implementation checks whether a File can be opened, falling back to whether an InputStream can be opened. This will cover both directories and content resources.

指定者:

exists 在接口中 Resource

覆盖:

exists 在类中 AbstractResource

isReadable

public boolean isReadable()

从类复制的说明: AbstractResource

This implementation always returns true for a resource that exists (revised as of 5.1).

指定者:

isReadable 在接口中 Resource

覆盖:

isReadable 在类中 AbstractResource

另请参阅:

InputStreamSource.getInputStream(), Resource.exists()

getInputStream

public InputStream getInputStream()
                           throws IOException

从接口复制的说明: InputStreamSource

Return an InputStream for the content of an underlying resource.

It is expected that each call creates a fresh stream.

This requirement is particularly important when you consider an API such as JavaMail, which needs to be able to read the stream multiple times when creating mail attachments. For such a use case, it is required that each getInputStream() call returns a fresh stream.

返回:

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

抛出:

FileNotFoundException - if the underlying resource doesn't exist

IOException - if the content stream could not be opened

getDescription

public String getDescription()

从接口复制的说明: Resource

Return a description for this resource, to be used for error output when working with the resource.

Implementations are also encouraged to return this value from their toString method.

另请参阅:

Object.toString()

equals

public boolean equals(Object other)

This implementation compares the underlying description String.

覆盖:

equals 在类中 AbstractResource

另请参阅:

Resource.getDescription()

hashCode

public int hashCode()

This implementation returns the hash code of the underlying description String.

覆盖:

hashCode 在类中 AbstractResource

另请参阅:

Resource.getDescription()