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java.lang.Object org.w3c.tools.resources.AttributeHolder org.w3c.tools.resources.Resource org.w3c.tools.resources.FramedResource org.w3c.tools.resources.ResourceFrame org.w3c.tools.resources.ResourceFilter org.w3c.jigsaw.filters.ErrorFilter
public class ErrorFilter
The ErroFilter class allows you to customize and enhance error messages. This filter will catch all errors on their way back to the client, and use internal requests to provide a nice customizable error message.
You can use any resources (including server side includes, content negotiated resources, etc) to deliver error messages.
Field Summary | |
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protected static int |
ATTR_BASEURL
Attribute index - The base URL for error messages. |
protected static int |
ATTR_EXTENSION
Attribute index - The common extension for error messages (can be null). |
protected static java.lang.String |
ERRED
A request state, to avoid looping on errors about errors. |
Fields inherited from class org.w3c.tools.resources.ResourceFrame |
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filterClass, frameListener, resource |
Fields inherited from class org.w3c.tools.resources.FramedResource |
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ATTR_OID, attrListener, debugEvent, event_disabled, framesRef, structListener |
Fields inherited from class org.w3c.tools.resources.Resource |
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ATTR_CONTEXT, ATTR_HELP_URL, ATTR_IDENTIFIER, ATTR_LAST_MODIFIED, ATTR_PARENT, ATTR_RESOURCE_FRAMES, ATTR_STORE_ENTRY, ATTR_URL, co, id |
Fields inherited from class org.w3c.tools.resources.AttributeHolder |
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attributes, values |
Constructor Summary | |
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ErrorFilter()
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Method Summary | |
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ReplyInterface |
exceptionFilter(RequestInterface request,
ProtocolException ex,
FilterInterface[] filters,
int idx)
We do catch exceptions, just in case we can customize the error. |
java.lang.String |
getBaseURL()
Get the base URL describing the error directory. |
java.lang.String |
getErrorResource(int status)
Compute the path for the given status code. |
java.lang.String |
getExtension()
Get the value of the extension attribute. |
ReplyInterface |
ingoingFilter(RequestInterface request)
This one just makes sure the outgoing filter gets called. |
void |
initialize(java.lang.Object[] values)
Initialize the frames of that framed resource. |
ReplyInterface |
outgoingFilter(RequestInterface req,
ReplyInterface rep)
Re-compute error message. |
Methods inherited from class org.w3c.tools.resources.ResourceFilter |
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getTargetResource, ingoingFilter, initialize, lookup, outgoingFilter, outputFilter, pickleValues |
Methods inherited from class org.w3c.tools.resources.ResourceFrame |
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addFrameEventListener, attributeChanged, checkRequest, eventDisabled, fireFrameEvent, frameModified, getFilters, getFilters, getFrameReference, getResource, getResourceReference, getSpaceEntry, getURLPath, lookupFilters, lookupFrames, perform, postFrameEvent, processEvent, registerResource, removeFrameEventListener, setValue, unregisterResource, updateDefaultChildAttributes |
Methods inherited from class org.w3c.tools.resources.Resource |
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acceptUnload, checkMultipleLock, collectFrames, getContext, getFrame, getFrames, getHelpURL, getHelpURL, getIdentifier, getLastModified, getParent, getServer, getSpace, getStoreEntry, getValue, getValue, isInitialized, isUnloaded, setContext, setContext, setValue, unsafeGetContext, unsafeGetFrame, unsafeGetFrames, unsafeGetIdentifier, unsafeGetResourceReference, unsafeGetURLPath, unsafeGetValue, updateAttributes |
Methods inherited from class org.w3c.tools.resources.AttributeHolder |
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definesAttribute, definesAttribute, getAttributes, getBoolean, getChar, getClone, getClone, getDouble, getFloat, getInt, getLong, getString, getValue, lookupAttribute, print, setBoolean, setChar, setDouble, setFloat, setInt, setLong, setString, setValue, unsafeDefinesAttribute, unsafeGetDouble, unsafeGetString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final java.lang.String ERRED
protected static int ATTR_BASEURL
protected static int ATTR_EXTENSION
Constructor Detail |
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public ErrorFilter()
Method Detail |
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public java.lang.String getBaseURL()
public java.lang.String getExtension()
public java.lang.String getErrorResource(int status)
public ReplyInterface ingoingFilter(RequestInterface request) throws ProtocolException
ingoingFilter
in class ResourceFilter
request
- The original request to be handled.
ProtocolException
- If processing should be interrupted,
because an abnormal situation occured.public ReplyInterface outgoingFilter(RequestInterface req, ReplyInterface rep) throws ProtocolException
outgoingFilter
in class ResourceFilter
request
- The request that has been handled.reply
- The reply, as emited by the original resource.
ProtocolException
- If processing should be interrupted,
because an abnormal situation occured.public ReplyInterface exceptionFilter(RequestInterface request, ProtocolException ex, FilterInterface[] filters, int idx)
exceptionFilter
in interface FilterInterface
exceptionFilter
in class ResourceFilter
request
- The request tha triggered the exception.ex
- The exception.filters
- Remaining filters to be called.idx
- Current filter index within above array.public void initialize(java.lang.Object[] values)
FramedResource
initialize
in class FramedResource
values
- Default attribute values.
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