CurrentPageTag.java

/*
 *
 * 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.Map;

import javax.servlet.ServletRequest;
import javax.servlet.jsp.JspException;

import com.agiletec.aps.system.ApsSystemUtils;
import com.agiletec.aps.system.RequestContext;
import com.agiletec.aps.system.SystemConstants;
import com.agiletec.aps.system.services.lang.ILangManager;
import com.agiletec.aps.system.services.lang.Lang;
import com.agiletec.aps.system.services.page.IPage;
import com.agiletec.aps.util.ApsWebApplicationUtils;

/**
 * Returns the requested information held by the current page bean.
 * It is possible to ask for the title in the current language (param value: "title") or the code 
 * (param: "code"). The title in the current language is returned if "param" is not specified
 * @author E.Santoboni
 */
public class CurrentPageTag extends PageInfoTag {
	
	@Override
	public int doEndTag() throws JspException {
		ServletRequest request = this.pageContext.getRequest();
		RequestContext reqCtx = (RequestContext) request.getAttribute(RequestContext.REQCTX);
		Lang currentLang = (Lang) reqCtx.getExtraParam(SystemConstants.EXTRAPAR_CURRENT_LANG);
		try {
			IPage page = (IPage) reqCtx.getExtraParam(SystemConstants.EXTRAPAR_CURRENT_PAGE);
			if (this.getParam() == null || this.getParam().equals(TITLE_INFO)) {
				this.extractPageTitle(page, currentLang, reqCtx);
			} else if (this.getParam().equals(CODE_INFO)) {
				this.setValue(page.getCode());
			} else if (this.getParam().equals(OWNER_INFO)) {
				this.extractPageOwner(page, reqCtx);
			} else if (this.getInfo().equals(CHILD_OF_INFO)) {
				this.extractIsChildOfTarget(page);
			}
			this.evalValue();
		} catch (Throwable t) {
			ApsSystemUtils.logThrowable(t, this, "doStartTag");
			throw new JspException("Error during tag initialization ", t);
		}
		return EVAL_PAGE;
	}
	
	protected void extractPageTitle(IPage page, Lang currentLang, RequestContext reqCtx) {
		if (!page.isUseExtraTitles()) {
			super.extractPageTitle(page, currentLang);
			return;
		}
		Object extraTitleObject = reqCtx.getExtraParam(SystemConstants.EXTRAPAR_EXTRA_PAGE_TITLES);
		if (null == extraTitleObject) {
			super.extractPageTitle(page, currentLang);
			return;
		}
		if (extraTitleObject instanceof String) {
			String extraTitleString = (String) extraTitleObject;
			if (extraTitleString.trim().length() > 0) {
				this.setValue(extraTitleString);
			} else {
				super.extractPageTitle(page, currentLang);
			}
		} else if (extraTitleObject instanceof Map<?, ?>) {
			this.extractPageTitleFromExtraTitles(page, currentLang, (Map) extraTitleObject);
			if (null == this.getValue()) {
				super.extractPageTitle(page, currentLang);
			}
		} else {
			super.extractPageTitle(page, currentLang);
		}
	}
	
	private void extractPageTitleFromExtraTitles(IPage page, Lang currentLang, Map extraTitlesMap) {
		Object value = null;
		if ((this.getLangCode() == null) || (this.getLangCode().equals(""))
				|| (currentLang.getCode().equalsIgnoreCase(this.getLangCode()))) {
			value = extraTitlesMap.get(currentLang.getCode());
		} else {
			value = extraTitlesMap.get(this.getLangCode());
		}
		if (value == null || value.toString().trim().equals("")) {
			ILangManager langManager = 
				(ILangManager) ApsWebApplicationUtils.getBean(SystemConstants.LANGUAGE_MANAGER, this.pageContext);
			value = extraTitlesMap.get(langManager.getDefaultLang().getCode());
		}
		if (null != value && value.toString().trim().length() > 0) {
			this.setValue(value.toString());
		}
	}

	protected String getParam() {
		return super.getInfo();
	}
	public void setParam(String param) {
		super.setInfo(param);
	}
	
}