Java tutorial
/* This file is part of Cyclos (www.cyclos.org). A project of the Social Trade Organisation (www.socialtrade.org). Cyclos is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Cyclos 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 General Public License for more details. You should have received a copy of the GNU General Public License along with Cyclos; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package nl.strohalm.cyclos.taglibs; import java.io.IOException; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.PageContext; import javax.servlet.jsp.tagext.TagSupport; import nl.strohalm.cyclos.entities.groups.Group; import nl.strohalm.cyclos.entities.settings.LocalSettings; import nl.strohalm.cyclos.entities.settings.LocalSettings.MemberResultDisplay; import nl.strohalm.cyclos.services.elements.ElementService; import nl.strohalm.cyclos.services.permissions.PermissionService; import nl.strohalm.cyclos.services.settings.SettingsService; import nl.strohalm.cyclos.utils.ElementVO; import nl.strohalm.cyclos.utils.SpringHelper; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.collections.Predicate; import org.apache.cxf.common.util.StringUtils; /** * Profile tag. When the logged user has permission to view the related element, it shows the profile link. If not, it shows the name or user name * based on the local settings. * @author jcomas */ public class ProfileTag extends TagSupport { private static final long serialVersionUID = 1L; private Long elementId = null; private String text = null; private Integer fieldLength = TruncateTag.DEFAULT_LENGTH; private String pattern = null; private String styleClass = null; private boolean onlyShowLabel = false; private ElementService elementService; private PermissionService permissionService; private SettingsService settingsService; @Override public int doEndTag() throws JspException { try { final JspWriter out = pageContext.getOut(); try { out.write(generateProfileField()); } catch (final IOException e) { throw new JspException(e); } } finally { release(); } return EVAL_PAGE; } public Long getElementId() { return elementId; } public Integer getFieldLength() { return fieldLength; } public String getPattern() { return pattern; } public String getStyleClass() { return styleClass; } public String getText() { return text; } public boolean isOnlyShowLabel() { return onlyShowLabel; } @Override public void release() { super.release(); elementId = null; text = null; pattern = null; fieldLength = TruncateTag.DEFAULT_LENGTH; styleClass = null; onlyShowLabel = false; } public void setElementId(final Long elementId) { this.elementId = elementId; } public void setFieldLength(final Integer fieldLength) { this.fieldLength = fieldLength; } public void setOnlyShowLabel(final boolean onlyShowLabel) { this.onlyShowLabel = onlyShowLabel; } @Override public void setPageContext(final PageContext pageContext) { super.setPageContext(pageContext); elementService = SpringHelper.bean(pageContext.getServletContext(), ElementService.class); permissionService = SpringHelper.bean(pageContext.getServletContext(), PermissionService.class); settingsService = SpringHelper.bean(pageContext.getServletContext(), SettingsService.class); } public void setPattern(final String pattern) { this.pattern = pattern; } public void setStyleClass(final String styleClass) { this.styleClass = styleClass; } public void setText(final String text) { this.text = text; } private String generateProfileField() { if (elementId <= 0) { return ""; } final ElementVO element = elementService.getElementVO(elementId); boolean canGoToProfile = false; final Object foundGroup = CollectionUtils.find(permissionService.getAllVisibleGroups(), new Predicate() { @Override public boolean evaluate(final Object group) { return ((Group) group).getId().equals(element.getGroupId()); } }); if (foundGroup != null) { canGoToProfile = true; } if (StringUtils.isEmpty(text)) { // The text will be the name or the user name based on the local settings. final LocalSettings localSettings = settingsService.getLocalSettings(); final MemberResultDisplay memberResultDisplay = localSettings.getMemberResultDisplay(); if (pattern != null) { text = pattern.replaceAll("username", element.getUsername()).replaceAll("name", element.getName()); } else { if (memberResultDisplay == MemberResultDisplay.NAME) { text = element.getName(); } else if (memberResultDisplay == MemberResultDisplay.USERNAME) { text = element.getUsername(); } } } // truncate text = TruncateTag.truncate(text, fieldLength); String profile; if (canGoToProfile && !onlyShowLabel) { profile = "<a class=\"$linkClass\" $attribute=\"$id\">$text</a>"; // $attribute, $class, $id and $text String linkClass = ""; String attribute = ""; switch (element.getNature()) { case ADMIN: linkClass = "adminProfileLink"; attribute = "adminId"; break; case MEMBER: linkClass = "profileLink"; attribute = "memberId"; break; case OPERATOR: linkClass = "operatorProfileLink"; attribute = "operatorId"; break; default: throw new IllegalArgumentException("Unexpected element identifier " + elementId); } if (!StringUtils.isEmpty(styleClass)) { linkClass += " " + styleClass; } profile = profile.replace("$linkClass", linkClass); profile = profile.replace("$attribute", attribute); profile = profile.replace("$id", elementId.toString()); profile = profile.replace("$text", text); } else { profile = text; } return profile; } }