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java.lang.Object org.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 | |
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AbstractResource()
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Method Summary | |
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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 throws IllegalStateException, assuming that the resource does not carry 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 |
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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 |
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public boolean exists()
exists
in interface Resource
public boolean isReadable()
true
.
isReadable
in interface Resource
public boolean isOpen()
false
.
isOpen
in interface Resource
public URL getURL() throws IOException
getURL
in interface Resource
IOException
- if the resource cannot be resolved as URL,
i.e. if the resource is not available as descriptorpublic URI getURI() throws IOException
getURL()
.
getURI
in interface Resource
IOException
- if the resource cannot be resolved as URI,
i.e. if the resource is not available as descriptorpublic File getFile() throws IOException
getFile
in interface Resource
IOException
- if the resource cannot be resolved as absolute
file path, i.e. if the resource is not available in a file systempublic long lastModified() throws IOException
lastModified
in interface Resource
IOException
- 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 systempublic Resource createRelative(String relativePath) throws IOException
createRelative
in interface Resource
relativePath
- the relative path (relative to this resource)
IOException
- if the relative resource cannot be determinedpublic String getFilename() throws IllegalStateException
getFilename
in interface Resource
IllegalStateException
public String toString()
toString
in class Object
Resource.getDescription()
public boolean equals(Object obj)
equals
in class Object
Resource.getDescription()
public int hashCode()
hashCode
in class Object
Resource.getDescription()
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