/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.myfaces.view.facelets.tag.ui;
import java.io.IOException;
import java.net.URL;
import java.util.Collection;
import javax.el.ELException;
import javax.el.ValueExpression;
import javax.el.VariableMapper;
import javax.faces.FacesException;
import javax.faces.application.ProjectStage;
import javax.faces.application.StateManager;
import javax.faces.component.UIComponent;
import javax.faces.event.PhaseId;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletException;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletAttribute;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletTag;
import org.apache.myfaces.shared.util.ClassUtils;
import org.apache.myfaces.view.facelets.AbstractFaceletContext;
import org.apache.myfaces.view.facelets.FaceletCompositionContext;
import org.apache.myfaces.view.facelets.el.VariableMapperWrapper;
import org.apache.myfaces.view.facelets.impl.TemplateContextImpl;
import org.apache.myfaces.view.facelets.tag.ComponentContainerHandler;
import org.apache.myfaces.view.facelets.tag.TagHandlerUtils;
import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport;
/**
* The include tag can point at any Facelet which might use the composition tag,
* component tag, or simply be straight XHTML/XML. It should be noted that the
* src path does allow relative path names, but they will always be resolved
* against the original Facelet requested.
*
* The include tag can be used in conjunction with multiple <ui:param/>
* tags to pass EL expressions/values to the target page.
*
* @author Jacob Hookom
* @version $Id: IncludeHandler.java 1576792 2014-03-12 15:57:38Z lu4242 $
*/
@JSFFaceletTag(name="ui:include", bodyContent="JSP")
public final class IncludeHandler extends TagHandler implements ComponentContainerHandler
{
private static final String ERROR_PAGE_INCLUDE_PATH = "javax.faces.error.xhtml";
private static final String ERROR_FACELET = "META-INF/rsc/myfaces-dev-error-include.xhtml";
/**
* A literal or EL expression that specifies the target Facelet that you
* would like to include into your document.
*/
@JSFFaceletAttribute(
className="javax.el.ValueExpression",
deferredValueType="java.lang.String",
required=true)
private final TagAttribute src;
private final ParamHandler[] _params;
/**
* @param config
*/
public IncludeHandler(TagConfig config)
{
super(config);
this.src = this.getRequiredAttribute("src");
Collection<ParamHandler> params = TagHandlerUtils.findNextByType(nextHandler, ParamHandler.class);
if (!params.isEmpty())
{
int i = 0;
_params = new ParamHandler[params.size()];
for (ParamHandler handler : params)
{
_params[i++] = handler;
}
}
else
{
_params = null;
}
}
/*
* (non-Javadoc)
*
* @see javax.faces.view.facelets.FaceletHandler#apply(javax.faces.view.facelets.FaceletContext, javax.faces.component.UIComponent)
*/
public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
ELException
{
AbstractFaceletContext actx = (AbstractFaceletContext) ctx;
FaceletCompositionContext fcc = FaceletCompositionContext.getCurrentInstance(ctx);
String path;
boolean markInitialState = false;
String uniqueId = null;
if (!src.isLiteral())
{
uniqueId = actx.generateUniqueFaceletTagId(
fcc.startComponentUniqueIdSection(), tagId);
}
else if (_params != null)
{
uniqueId = actx.generateUniqueFaceletTagId(
fcc.generateUniqueComponentId(), tagId);
}
if (!src.isLiteral())
{
//String uniqueId = fcc.startComponentUniqueIdSection();
//path = getSrcValue(actx, fcc, parent, uniqueId);
String restoredPath = (String) ComponentSupport.restoreInitialTagState(ctx, fcc, parent, uniqueId);
if (restoredPath != null)
{
// If is not restore view phase, the path value should be
// evaluated and if is not equals, trigger markInitialState stuff.
if (!PhaseId.RESTORE_VIEW.equals(ctx.getFacesContext().getCurrentPhaseId()))
{
path = this.src.getValue(ctx);
if (path == null || path.length() == 0)
{
return;
}
if (!path.equals(restoredPath))
{
markInitialState = true;
}
}
else
{
path = restoredPath;
}
}
else
{
//No state restored, calculate path
path = this.src.getValue(ctx);
}
ComponentSupport.saveInitialTagState(ctx, fcc, parent, uniqueId, path);
}
else
{
path = this.src.getValue(ctx);
}
try
{
if (path == null || path.length() == 0)
{
return;
}
VariableMapper orig = ctx.getVariableMapper();
ctx.setVariableMapper(new VariableMapperWrapper(orig));
try
{
//Only ui:param could be inside ui:include.
//this.nextHandler.apply(ctx, null);
URL url = null;
boolean oldMarkInitialState = false;
Boolean isBuildingInitialState = null;
// if we are in ProjectStage Development and the path equals "javax.faces.error.xhtml"
// we should include the default error page
if (ctx.getFacesContext().isProjectStage(ProjectStage.Development)
&& ERROR_PAGE_INCLUDE_PATH.equals(path))
{
url =ClassUtils.getResource(ERROR_FACELET);
}
if (markInitialState)
{
//set markInitialState flag
oldMarkInitialState = fcc.isMarkInitialState();
fcc.setMarkInitialState(true);
isBuildingInitialState = (Boolean) ctx.getFacesContext().getAttributes().put(
StateManager.IS_BUILDING_INITIAL_STATE, Boolean.TRUE);
}
try
{
if (_params != null)
{
// ui:include defines a new TemplateContext, but ui:param EL expressions
// defined inside should be built before the new context is setup, to
// apply then after. The final effect is EL expressions will be resolved
// correctly when nested ui:params with the same name or based on other
// ui:params are used.
String[] names = new String[_params.length];
ValueExpression[] values = new ValueExpression[_params.length];
for (int i = 0; i < _params.length; i++)
{
names[i] = _params[i].getName(ctx);
values[i] = _params[i].getValue(ctx);
}
actx.pushTemplateContext(new TemplateContextImpl());
for (int i = 0; i < _params.length; i++)
{
_params[i].apply(ctx, parent, names[i], values[i], uniqueId);
}
}
else
{
actx.pushTemplateContext(new TemplateContextImpl());
}
if (url == null)
{
ctx.includeFacelet(parent, path);
}
else
{
ctx.includeFacelet(parent, url);
}
}
finally
{
if (markInitialState)
{
//unset markInitialState flag
if (isBuildingInitialState == null)
{
ctx.getFacesContext().getAttributes().remove(
StateManager.IS_BUILDING_INITIAL_STATE);
}
else
{
ctx.getFacesContext().getAttributes().put(
StateManager.IS_BUILDING_INITIAL_STATE, isBuildingInitialState);
}
fcc.setMarkInitialState(oldMarkInitialState);
}
actx.popTemplateContext();
}
}
finally
{
ctx.setVariableMapper(orig);
}
}
finally
{
if (!src.isLiteral())
{
fcc.endComponentUniqueIdSection();
}
}
if (!src.isLiteral() && fcc.isUsingPSSOnThisView() && fcc.isRefreshTransientBuildOnPSS() &&
!fcc.isRefreshingTransientBuild())
{
//Mark the parent component to be saved and restored fully.
ComponentSupport.markComponentToRestoreFully(ctx.getFacesContext(), parent);
}
if (!src.isLiteral() && fcc.isDynamicComponentSection())
{
ComponentSupport.markComponentToRefreshDynamically(ctx.getFacesContext(), parent);
}
}
}