/*
*
* Copyright 2005 AgileTec s.r.l. (http://www.agiletec.it) All rights reserved.
*
* This file is part of jAPS software.
* jAPS is a free software;
* you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation; version 2.
*
* See the file License for the specific language governing permissions
* and limitations under the License
*
*
*
* Copyright 2005 AgileTec s.r.l. (http://www.agiletec.it) All rights reserved.
*
*/
package com.agiletec.aps.tags;
import java.util.List;
import javax.servlet.ServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import com.agiletec.aps.system.ApsSystemUtils;
import com.agiletec.aps.system.RequestContext;
import com.agiletec.aps.system.SystemConstants;
import com.agiletec.aps.system.services.page.IPage;
import com.agiletec.aps.system.services.page.Showlet;
import com.agiletec.aps.system.services.page.showlet.INavigatorParser;
import com.agiletec.aps.system.services.page.showlet.NavigatorTarget;
import com.agiletec.aps.system.services.user.UserDetails;
import com.agiletec.aps.util.ApsProperties;
import com.agiletec.aps.util.ApsWebApplicationUtils;
/**
* Iterating tag that generates a list containing a set of pages
* @author M.Diana - E.Santoboni
*/
public class NavigatorTag extends TagSupport {
@Override
public int doStartTag() throws JspException {
ServletRequest request = this.pageContext.getRequest();
try {
this._reqCtx = (RequestContext) request.getAttribute(RequestContext.REQCTX);
INavigatorParser navigatorParser = (INavigatorParser) ApsWebApplicationUtils.getBean(SystemConstants.NAVIGATOR_PARSER, this.pageContext);
IPage currPage = (IPage) this._reqCtx.getExtraParam(SystemConstants.EXTRAPAR_CURRENT_PAGE);
UserDetails currentUser = (UserDetails) this.pageContext.getSession().getAttribute(SystemConstants.SESSIONPARAM_CURRENT_USER);
if (this._spec == null) {
Showlet currShowlet = (Showlet) _reqCtx.getExtraParam((SystemConstants.EXTRAPAR_CURRENT_SHOWLET));
ApsProperties showletConfig = currShowlet.getConfig();
String spec = (null != showletConfig) ? showletConfig.getProperty(CONFIG_PARAM_SPEC) : null;
this._targets = navigatorParser.parseSpec(spec, currPage, currentUser);
} else {
this._targets = navigatorParser.parseSpec(this._spec, currPage, currentUser);
}
if (this._targets == null || this._targets.isEmpty()) {
return SKIP_BODY;
}
this._index = 0;
NavigatorTarget currentTarget = this.getCurrentTarget();
this.pageContext.setAttribute(this.getVar(), currentTarget);
return EVAL_BODY_INCLUDE;
} catch (Throwable t) {
ApsSystemUtils.logThrowable(t, this, "doStartTag");
throw new JspException("Error during tag initialization ", t);
}
}
@Override
public int doAfterBody() throws JspException {
this._index++;
if (this._index >= _targets.size()) {
return SKIP_BODY;
} else {
NavigatorTarget currentTarget = this.getCurrentTarget();
this.pageContext.setAttribute(this.getVar(), currentTarget);
return EVAL_BODY_AGAIN;
}
}
private NavigatorTarget getCurrentTarget() {
NavigatorTarget item = this._targets.get(this._index);
item.setRequestContext(this._reqCtx);
return item;
}
@Override
public int doEndTag() throws JspException {
this.pageContext.removeAttribute(this.getVar());
return super.doEndTag();
}
@Override
public void release() {
this._spec = null;
this._targets = null;
this._reqCtx = null;
this._var = null;
}
/**
* Return the attribute that specifies the subset of pages.
* @return The specification of the subset.
*/
public String getSpec() {
return _spec;
}
/**
* Set the attribute that specifies the subset of pages.
* @param spec The specification of the subset.
*/
public void setSpec(String spec) {
this._spec = spec;
}
/**
* Return the name of the page context variable where the data of target
* being iterated are made available
* @return The name of the variable containing the current element
*/
public String getVar() {
return _var;
}
/**
* Set the name of the page context variable where the data of target
* being iterated are made available
* @param var The name of the variable containing the current element
*/
public void setVar(String var) {
this._var = var;
}
public static final String CONFIG_PARAM_SPEC = "navSpec";
private String _spec;
private List<NavigatorTarget> _targets;
private int _index;
private String _var;
private RequestContext _reqCtx;
}