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java.lang.Objectorg.springframework.core.io.AbstractResource
public abstract class AbstractResource
Convenience base class for Resource implementations,
pre-implementing typical behavior.
The "exists" method will check whether a File or InputStream can be opened; "isOpen" will always return false; "getURL" and "getFile" throw an exception; and "toString" will return the description.
| Constructor Summary | |
|---|---|
AbstractResource()
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| Method Summary | |
|---|---|
long |
contentLength()
This implementation reads the entire InputStream to calculate the content length. |
Resource |
createRelative(String relativePath)
This implementation throws a FileNotFoundException, assuming that relative resources cannot be created for this resource. |
boolean |
equals(Object obj)
This implementation compares description strings. |
boolean |
exists()
This implementation checks whether a File can be opened, falling back to whether an InputStream can be opened. |
File |
getFile()
This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to an absolute file path. |
protected File |
getFileForLastModifiedCheck()
Determine the File to use for timestamp checking. |
String |
getFilename()
This implementation always returns null,
assuming that this resource type does not have a filename. |
URI |
getURI()
This implementation builds a URI based on the URL returned by getURL(). |
URL |
getURL()
This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to a URL. |
int |
hashCode()
This implementation returns the description's hash code. |
boolean |
isOpen()
This implementation always returns false. |
boolean |
isReadable()
This implementation always returns true. |
long |
lastModified()
This implementation checks the timestamp of the underlying File, if available. |
String |
toString()
This implementation returns the description of this resource. |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Methods inherited from interface org.springframework.core.io.Resource |
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getDescription |
| Methods inherited from interface org.springframework.core.io.InputStreamSource |
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getInputStream |
| Constructor Detail |
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public AbstractResource()
| Method Detail |
|---|
public boolean exists()
exists in interface Resourcepublic boolean isReadable()
true.
isReadable in interface ResourceInputStreamSource.getInputStream()public boolean isOpen()
false.
isOpen in interface Resource
public URL getURL()
throws IOException
getURL in interface ResourceIOException - if the resource cannot be resolved as URL,
i.e. if the resource is not available as descriptor
public URI getURI()
throws IOException
getURL().
getURI in interface ResourceIOException - if the resource cannot be resolved as URI,
i.e. if the resource is not available as descriptor
public File getFile()
throws IOException
getFile in interface ResourceIOException - if the resource cannot be resolved as absolute
file path, i.e. if the resource is not available in a file system
public long contentLength()
throws IOException
contentLength in interface ResourceIOException - if the resource cannot be resolved
(in the file system or as some other known physical resource type)InputStreamSource.getInputStream()
public long lastModified()
throws IOException
lastModified in interface ResourceIOException - if the resource cannot be resolved
(in the file system or as some other known physical resource type)getFileForLastModifiedCheck()
protected File getFileForLastModifiedCheck()
throws IOException
The default implementation delegates to getFile().
null)
IOException - if the resource cannot be resolved as absolute
file path, i.e. if the resource is not available in a file system
public Resource createRelative(String relativePath)
throws IOException
createRelative in interface ResourcerelativePath - the relative path (relative to this resource)
IOException - if the relative resource cannot be determinedpublic String getFilename()
null,
assuming that this resource type does not have a filename.
getFilename in interface Resourcepublic String toString()
toString in class ObjectResource.getDescription()public boolean equals(Object obj)
equals in class ObjectResource.getDescription()public int hashCode()
hashCode in class ObjectResource.getDescription()
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