Java tutorial
/** * This Source Code Form is subject to the terms of the Mozilla Public License, * v. 2.0. If a copy of the MPL was not distributed with this file, You can * obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under * the terms of the Healthcare Disclaimer located at http://openmrs.org/license. * * Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS * graphic logo is a trademark of OpenMRS Inc. */ package org.openmrs.web.taglib; import java.io.IOException; import java.sql.Timestamp; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import javax.servlet.jsp.PageContext; import javax.servlet.jsp.tagext.TagSupport; import org.apache.commons.lang.time.DateUtils; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.openmrs.api.context.Context; import org.openmrs.util.OpenmrsUtil; import org.springframework.web.servlet.support.BindStatus; import org.springframework.web.servlet.support.RequestContext; import org.springframework.web.servlet.tags.NestedPathTag; import org.springframework.web.servlet.tags.RequestContextAwareTag; /** * Formats a date object in the desired type:<br> * e.g: * * <pre> * <openmrs:formatDate date="${dateObj}" type="textbox"/> * </pre> * * becomes a string like: "20/11/2009" in the user's current locale. <br> * <br> * Options for "type" are: * <ul> * <li>xml - dd-MMM-yyyy * <li>long - DateFormat.LONG * <li>medium - DateFormat.MEDIUM * <li>textbox - Context.getDateFormat() * <li>milliseconds - current milliseconds since the epoch * </ul> */ public class FormatDateTag extends TagSupport { public static final long serialVersionUID = 121341222L; private final Log log = LogFactory.getLog(getClass()); private Date date; private Boolean dateWasSet = false; private String path; private String type; private String format; private boolean showTodayOrYesterday = false; public int doStartTag() { RequestContext requestContext = (RequestContext) this.pageContext .getAttribute(RequestContextAwareTag.REQUEST_CONTEXT_PAGE_ATTRIBUTE); if (date == null && getPath() != null) { try { // get the "path" object from the pageContext String resolvedPath = getPath(); String nestedPath = (String) pageContext.getAttribute(NestedPathTag.NESTED_PATH_VARIABLE_NAME, PageContext.REQUEST_SCOPE); if (nestedPath != null) { resolvedPath = nestedPath + resolvedPath; } BindStatus status = new BindStatus(requestContext, resolvedPath, false); log.debug("status: " + status); if (status.getValue() != null) { log.debug("status.value: " + status.getValue()); if (status.getValue().getClass() == Date.class) { // if no editor was registered all will go well here date = (Date) status.getValue(); } else { // if a "Date" property editor was registerd for the form, the status.getValue() // object will be a java.lang.String. This is useless. Try getting the original // value from the troublesome editor log.debug("status.valueType: " + status.getValueType()); Timestamp timestamp = (Timestamp) status.getEditor().getValue(); date = new Date(timestamp.getTime()); } } } catch (Exception e) { log.warn("Unable to get a date object from path: " + getPath(), e); return SKIP_BODY; } } if (!dateWasSet && date == null) { log.warn("Both 'date' and 'path' cannot be null. Page: " + pageContext.getPage() + " localname:" + pageContext.getRequest().getLocalName() + " rd:" + pageContext.getRequest().getRequestDispatcher("")); return SKIP_BODY; } if (type == null) { type = ""; } DateFormat dateFormat = null; if (format != null && format.length() > 0) { dateFormat = new SimpleDateFormat(format, Context.getLocale()); } else if (type.equals("xml")) { dateFormat = new SimpleDateFormat("dd-MMM-yyyy", Context.getLocale()); } else { log.debug("context locale: " + Context.getLocale()); if (type.equals("long")) { dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, Context.getLocale()); } else if (type.equals("medium")) { dateFormat = DateFormat.getDateInstance(DateFormat.MEDIUM, Context.getLocale()); } else { dateFormat = Context.getDateFormat(); } } if (dateFormat == null) { dateFormat = new SimpleDateFormat("MM-dd-yyyy"); } String datestr = ""; try { if (date != null) { if (type.equals("milliseconds")) { datestr = "" + date.getTime(); } else { if (showTodayOrYesterday && (DateUtils.isSameDay(Calendar.getInstance().getTime(), date) || OpenmrsUtil.isYesterday(date))) { //print only time of day but maintaining the format(24 Vs 12) if any was specified String timeFormatString = (format != null && !format.contains("a")) ? "HH:mm" : "h:mm a"; dateFormat = new SimpleDateFormat(timeFormatString); if (DateUtils.isSameDay(Calendar.getInstance().getTime(), date)) { datestr = Context.getMessageSourceService().getMessage("general.today") + " " + dateFormat.format(date); } else { datestr = Context.getMessageSourceService().getMessage("general.yesterday") + " " + dateFormat.format(date); } } else { datestr = dateFormat.format(date); } } } } catch (IllegalArgumentException e) { //format or date is invalid log.error("date: " + date); log.error("format: " + format); log.error(e); datestr = date.toString(); } try { pageContext.getOut().write(datestr); } catch (IOException e) { log.error(e); } // reset the objects to null because taglibs are reused release(); return SKIP_BODY; } /** * Clean up the variables */ public void release() { super.release(); this.dateWasSet = false; this.date = null; this.format = null; this.path = null; this.showTodayOrYesterday = false; } // variable access methods public Date getDate() { return date; } public void setDate(Date date) { this.dateWasSet = true; this.date = date; } public String getPath() { return path; } public void setPath(String path) { this.path = path; } public String getFormat() { return format; } public void setFormat(String format) { this.format = format; } public String getType() { return type; } public void setType(String type) { this.type = type; } /** * @return the showTodayOrYesterday * @since 1.9 */ public boolean isShowTodayOrYesterday() { return showTodayOrYesterday; } /** * @param showTodayOrYesterday the showTodayOrYesterday to set * @since 1.9 */ public void setShowTodayOrYesterday(boolean showTodayOrYesterday) { this.showTodayOrYesterday = showTodayOrYesterday; } }