/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.jsp.util;
import org.opencms.file.CmsObject;
import org.opencms.file.CmsResource;
import org.opencms.jsp.CmsJspNavBuilder;
import org.opencms.jsp.CmsJspNavElement;
import org.opencms.jsp.CmsJspTagNavigation;
import org.opencms.main.CmsException;
import org.opencms.util.CmsCollectionsGenericWrapper;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.commons.collections.Transformer;
/**
* Allows access to the OpenCms navigation information in combination with the
* <code><cms:navigation></code> tag.<p>
*
* @since 8.0
*
* @see org.opencms.jsp.CmsJspTagContentAccess
*/
public class CmsJspNavigationBean {
/**
* Provides a Map with Booleans that
* indicate if the given URI is the currently active element in the navigation.<p>
*/
public class CmsIsActiveTransformer implements Transformer {
/**
* @see org.apache.commons.collections.Transformer#transform(java.lang.Object)
*/
public Object transform(Object input) {
String resourceName = (String)input;
Boolean result = Boolean.FALSE;
if (CmsResource.isFolder(resourceName)) {
try {
CmsResource defaultFile = m_cms.readDefaultFile(resourceName);
if ((defaultFile != null)
&& m_cms.getRequestContext().getSitePath(defaultFile).equals(m_cms.getRequestContext().getUri())) {
result = Boolean.TRUE;
}
} catch (CmsException e) {
// error reading resource, result is false
}
} else {
result = Boolean.valueOf(m_cms.getRequestContext().getUri().equals(resourceName));
}
return result;
}
}
/**
* Provides a Map with Booleans that
* indicate if the given navigation URI is a parent element of the current URI.<p>
*/
public class CmsIsParentTransformer implements Transformer {
/**
* @see org.apache.commons.collections.Transformer#transform(java.lang.Object)
*/
public Object transform(Object input) {
return Boolean.valueOf(m_cms.getRequestContext().getUri().startsWith((String)input));
}
}
/** The navigation builder. */
protected CmsJspNavBuilder m_builder;
/** The OpenCms user context. */
protected CmsObject m_cms;
/** The navigation element of the currently requested uri. */
protected CmsJspNavElement m_current;
/** The optional end level for the navigation. */
protected int m_endLevel;
/** Indicates if a given navigation uri is currently active. */
protected Map<String, Boolean> m_isActive;
/** Indicates if the given navigation URI is a parent element of the current URI. */
protected Map<String, Boolean> m_isParent;
/** The result items from the navigation. */
protected List<CmsJspNavElement> m_items;
/** The optional parameter for the navigation. */
protected String m_param;
/** The optional resource for the navigation. */
protected String m_resource;
/** The optional start level for the navigation. */
protected int m_startLevel;
/** The selected navigation type. */
protected CmsJspTagNavigation.Type m_type;
/**
* Base constructor.<p>
*
* @param cms the current users OpenCms context to build the navigation for
* @param type the navigation type to generate
* @param startLevel the optional start level
* @param endLevel the optional end level
* @param resource the optional resource for the navigation
* @param param the optional parameter for the navigation
*/
public CmsJspNavigationBean(
CmsObject cms,
CmsJspTagNavigation.Type type,
int startLevel,
int endLevel,
String resource,
String param) {
m_cms = cms;
m_builder = new CmsJspNavBuilder(m_cms);
m_type = type;
m_startLevel = startLevel;
m_endLevel = endLevel;
m_resource = resource;
m_param = param;
}
/**
* Returns the navigation element of the currently requested uri.<p>
*
* @return the navigation element of the currently requested uri
*/
public CmsJspNavElement getCurrent() {
if (m_current == null) {
m_current = m_builder.getNavigationForResource();
}
return m_current;
}
/**
* Returns a lazy initialized Map that provides Booleans that
* indicate if a given navigation uri is currently active.<p>
*
* The provided Map key is assumed to be a String that represents an absolute VFS path.<p>
*
* Usage example on a JSP with the JSTL:<pre>
* <cms:navigation type="treeForFolder" startLevel="1" endLevel="3" var="nav" />
* <c:forEach var="entry" items="${nav.items}" ... >
* ...
* <c:if test="${nav.isActive[entry.resourceName]}" >
* This is the currently active navigation entry
* </c:if>
* </c:forEach></pre>
*
* @return a lazy initialized Map that provides Booleans that
* indicate if a given navigation uri is currently active
*/
public Map<String, Boolean> getIsActive() {
if (m_isActive == null) {
m_isActive = CmsCollectionsGenericWrapper.createLazyMap(new CmsIsActiveTransformer());
}
return m_isActive;
}
/**
* Returns a lazy initialized Map that provides Booleans that
* indicate if the given navigation URI is a parent element of the current URI.<p>
*
* The provided Map key is assumed to be a String that represents an absolute VFS path.<p>
*
* Usage example on a JSP with the JSTL:<pre>
* <cms:navigation type="treeForFolder" startLevel="1" endLevel="3" var="nav" />
* <c:forEach var="entry" items="${nav.items}" ... >
* ...
* <c:if test="${nav.isParent[entry.resourceName]}" >
* The currently active navigation entry is a parent of the currently requested URI
* </c:if>
* </c:forEach></pre>
*
* @return a lazy initialized Map that provides Booleans that
* indicate if the given navigation URI is a parent element of the current URI
*/
public Map<String, Boolean> getIsParent() {
if (m_isParent == null) {
m_isParent = CmsCollectionsGenericWrapper.createLazyMap(new CmsIsParentTransformer());
}
return m_isParent;
}
/**
* Returns the list of selected navigation elements.<p>
*
* @return the list of selected navigation elements
*/
public List<CmsJspNavElement> getItems() {
if (m_items == null) {
switch (m_type) {
// calculate the results based on the given parameters
case forFolder:
if (m_startLevel == Integer.MIN_VALUE) {
// no start level set
if (m_resource == null) {
m_items = m_builder.getNavigationForFolder();
} else {
m_items = m_builder.getNavigationForFolder(m_resource);
}
} else {
// start level is set
if (m_resource == null) {
m_items = m_builder.getNavigationForFolder(m_startLevel);
} else {
m_items = m_builder.getNavigationForFolder(m_resource, m_startLevel);
}
}
break;
case forSite:
if (m_resource == null) {
m_items = m_builder.getSiteNavigation();
} else {
m_items = m_builder.getSiteNavigation(m_resource, m_endLevel);
}
break;
case breadCrumb:
if (m_resource != null) {
// resource is set
m_items = m_builder.getNavigationBreadCrumb(
m_resource,
m_startLevel,
m_endLevel,
Boolean.valueOf(m_param).booleanValue());
} else {
if (m_startLevel == Integer.MIN_VALUE) {
// no start level
m_items = m_builder.getNavigationBreadCrumb();
} else {
if (m_endLevel == Integer.MIN_VALUE) {
m_items = m_builder.getNavigationBreadCrumb(m_startLevel, m_endLevel);
} else {
m_items = m_builder.getNavigationBreadCrumb(
m_startLevel,
Boolean.valueOf(m_param).booleanValue());
}
}
}
break;
case treeForFolder:
if (m_resource == null) {
m_items = m_builder.getNavigationTreeForFolder(m_startLevel, m_endLevel);
} else {
m_items = m_builder.getNavigationTreeForFolder(m_resource, m_startLevel, m_endLevel);
}
break;
case forResource:
default:
List<CmsJspNavElement> items = new ArrayList<CmsJspNavElement>(1);
if (m_resource == null) {
items.add(m_builder.getNavigationForResource());
} else {
items.add(m_builder.getNavigationForResource(m_resource));
}
m_items = items;
break;
}
}
return m_items;
}
}