org.opencms.file.history
Class CmsHistoryResourceHandler

java.lang.Object
  org.opencms.file.history.CmsHistoryResourceHandler

All Implemented Interfaces:

I_CmsResourceInit

public class CmsHistoryResourceHandler
extends java.lang.Object
implements I_CmsResourceInit

Resource init handler that loads historical versions of resources.

Since:

6.9.1

Field Summary

static java.lang.String	ATTRIBUTE_NAME Constant for the historical version request attribute name.
static java.lang.String	HISTORY_HANDLER The historical version handler path.
static java.lang.String	PARAM_VERSION Request parameter name for the version number.
static int	PROJECT_OFFLINE_VERSION Constant for the offline project version.

Constructor Summary

CmsHistoryResourceHandler()

Method Summary

static I_CmsHistoryResource	getHistoryResource(javax.servlet.ServletRequest req) Returns the historical version of a resource, if the given request is displaying a history version.
static java.lang.String	getHistoryResourceURI(java.lang.String uri, javax.servlet.ServletRequest req) Appends the version parameter to the URI if needed.
static CmsResource	getResourceWithHistory(CmsObject cms, java.lang.String resourceUri) Returns the correct resource for the given URI, taken into account historical versions marked by the version parameter.
CmsResource	initResource(CmsResource resource, CmsObject cms, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res) Possibility to modify or change the CmsFile with the CmsObject.
static boolean	isHistoryRequest(javax.servlet.ServletRequest req) Returns true if the given request is displaying an historical version.

Methods inherited from class java.lang.Object

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

Field Detail

ATTRIBUTE_NAME

public static final java.lang.String ATTRIBUTE_NAME

Constant for the historical version request attribute name.

See Also:

Constant Field Values

HISTORY_HANDLER

public static final java.lang.String HISTORY_HANDLER

The historical version handler path.

See Also:

Constant Field Values

PARAM_VERSION

public static final java.lang.String PARAM_VERSION

Request parameter name for the version number.

See Also:

Constant Field Values

PROJECT_OFFLINE_VERSION

public static final int PROJECT_OFFLINE_VERSION

Constant for the offline project version.

See Also:

Constant Field Values

Constructor Detail

CmsHistoryResourceHandler

public CmsHistoryResourceHandler()

Method Detail

getHistoryResource

public static I_CmsHistoryResource getHistoryResource(javax.servlet.ServletRequest req)

Returns the historical version of a resource, if the given request is displaying a history version.

Parameters:

req - the request to check

Returns:

the historical resource if the given request is displaying an historical version

getHistoryResourceURI

public static java.lang.String getHistoryResourceURI(java.lang.String uri,
                                                     javax.servlet.ServletRequest req)

Appends the version parameter to the URI if needed.

Parameters:

uri - the resource URI

req - the current request

Returns:

the same URI, with additional parameters in case of a historical request

getResourceWithHistory

public static CmsResource getResourceWithHistory(CmsObject cms,
                                                 java.lang.String resourceUri)
                                          throws CmsException

Returns the correct resource for the given URI, taken into account historical versions marked by the version parameter.

Parameters:

cms - the current CMS context

resourceUri - the resource URI

Returns:

the resource, which can be an instance of I_CmsHistoryResource

Throws:

CmsException - if something goes wrong

isHistoryRequest

public static boolean isHistoryRequest(javax.servlet.ServletRequest req)

Returns true if the given request is displaying an historical version.

Parameters:

req - the request to check

Returns:

true if the given request is displaying a historical version

initResource

public CmsResource initResource(CmsResource resource,
                                CmsObject cms,
                                javax.servlet.http.HttpServletRequest req,
                                javax.servlet.http.HttpServletResponse res)
                         throws CmsResourceInitException

Description copied from interface: I_CmsResourceInit

Possibility to modify or change the CmsFile with the CmsObject.

Caution: reading parameters from the request, destroys special characters in all parameters, because the encoding for the request was not set yet.

Specified by:

initResource in interface I_CmsResourceInit

Parameters:

resource - the requested file

cms - the current CmsObject

req - the current request

res - the current response

Returns:

a resource in the OpenCms VFS

Throws:

CmsResourceInitException - if other implementations of the interface should not be executed

See Also:

I_CmsResourceInit.initResource(org.opencms.file.CmsResource, org.opencms.file.CmsObject, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)