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.controls.accounts.guarantees.certifications; import java.math.BigDecimal; import java.util.Collection; import java.util.Collections; import java.util.List; import javax.servlet.http.HttpServletRequest; import nl.strohalm.cyclos.access.AdminMemberPermission; import nl.strohalm.cyclos.annotations.Inject; import nl.strohalm.cyclos.controls.ActionContext; import nl.strohalm.cyclos.controls.BaseFormAction; import nl.strohalm.cyclos.entities.Entity; import nl.strohalm.cyclos.entities.accounts.guarantees.Certification; import nl.strohalm.cyclos.entities.accounts.guarantees.Certification.Status; import nl.strohalm.cyclos.entities.accounts.guarantees.CertificationLog; import nl.strohalm.cyclos.entities.accounts.guarantees.Guarantee; import nl.strohalm.cyclos.entities.accounts.guarantees.GuaranteeType; import nl.strohalm.cyclos.entities.groups.Group; import nl.strohalm.cyclos.entities.members.Element; import nl.strohalm.cyclos.entities.members.Member; import nl.strohalm.cyclos.entities.settings.LocalSettings; import nl.strohalm.cyclos.services.accounts.guarantees.CertificationService; import nl.strohalm.cyclos.services.accounts.guarantees.GuaranteeService; import nl.strohalm.cyclos.utils.ActionHelper; import nl.strohalm.cyclos.utils.ActionHelper.ByElementExtractor; import nl.strohalm.cyclos.utils.Amount; import nl.strohalm.cyclos.utils.EntityHelper; import nl.strohalm.cyclos.utils.RequestHelper; import nl.strohalm.cyclos.utils.binding.BeanBinder; import nl.strohalm.cyclos.utils.binding.DataBinder; import nl.strohalm.cyclos.utils.binding.DataBinderHelper; import nl.strohalm.cyclos.utils.binding.PropertyBinder; import nl.strohalm.cyclos.utils.conversion.IdConverter; import nl.strohalm.cyclos.utils.query.PageParameters; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.collections.Predicate; import org.apache.struts.action.ActionForward; public class EditCertificationAction extends BaseFormAction { private DataBinder<Certification> dataBinder; private CertificationService certificationService; private GuaranteeService guaranteeService; @Inject public void setCertificationService(final CertificationService certificationService) { this.certificationService = certificationService; } @Inject public void setGuaranteeService(final GuaranteeService guaranteeService) { this.guaranteeService = guaranteeService; } @Override protected ActionForward handleSubmit(final ActionContext context) throws Exception { final EditCertificationForm form = context.getForm(); final Certification certification = getDataBinder().readFromString(form.getCertification()); final boolean isInsert = certification.isTransient(); initialize(certification, context); certificationService.save(certification); context.sendMessage(isInsert ? "certification.inserted" : "certification.modified"); return ActionHelper.redirectWithParam(context.getRequest(), context.getSuccessForward(), "certificationId", certification.getId()); } @SuppressWarnings("unchecked") @Override protected void prepareForm(final ActionContext context) throws Exception { final HttpServletRequest request = context.getRequest(); final EditCertificationForm form = context.getForm(); final long id = form.getCertificationId(); final boolean isInsert = id <= 0L; // TODO: Who has permissions to modify a certification? final boolean isEditable = isInsert; final boolean isIssuer = (Boolean) context.getSession().getAttribute("isIssuer"); if (!isInsert) { final Certification certification = certificationService.load(id, Certification.Relationships.GUARANTEE_TYPE, Certification.Relationships.BUYER); getDataBinder().writeAsString(form.getCertification(), certification); final LocalSettings localSettings = settingsService.getLocalSettings(); final PageParameters guaranteesPageParameters = new PageParameters(localSettings.getMaxPageResults(), form.getGuaranteesPage()); final List<Guarantee> guarantees = guaranteeService.getGuarantees(certification, guaranteesPageParameters, Collections.EMPTY_LIST); final ByElementExtractor extractor = new ByElementExtractor() { @Override public Element getByElement(final Entity entity) { return ((CertificationLog) entity).getBy(); } }; final boolean showGuarantees = !context.isAdmin() || permissionService.hasPermission(AdminMemberPermission.GUARANTEES_VIEW_GUARANTEES); request.setAttribute("certification", certification); request.setAttribute("showGuarantees", showGuarantees); request.setAttribute("logsBy", ActionHelper.getByElements(context, certification.getLogs(), extractor)); request.setAttribute("canLock", certificationService.canChangeStatus(certification, Status.SUSPENDED)); request.setAttribute("canUnlock", certificationService.canChangeStatus(certification, Status.ACTIVE)); request.setAttribute("canCancel", certificationService.canChangeStatus(certification, Status.CANCELLED)); request.setAttribute("canDelete", guarantees.isEmpty() && certificationService.canDelete(certification)); request.setAttribute("guarantees", guarantees); request.setAttribute("usedAmount", certificationService.getUsedAmount(certification, false)); } if (isIssuer) { // only if the logged user is a issuer we must search for guarantee types Group group = context.getGroup(); group = groupService.load(group.getId(), Group.Relationships.GUARANTEE_TYPES); final Collection<GuaranteeType> guaranteeTypes = group.getEnabledGuaranteeTypes(); filterGuaranteeTypes(guaranteeTypes); request.setAttribute("guaranteeTypes", guaranteeTypes); } if (isEditable) { request.setAttribute("buyerGroupIds", EntityHelper.toIdsAsString(guaranteeService.getBuyers())); } else { request.setAttribute("buyerGroupIds", "[]"); } request.setAttribute("isInsert", isInsert); request.setAttribute("isEditable", isEditable); RequestHelper.storeEnum(request, Amount.Type.class, "amountTypes"); RequestHelper.storeEnum(request, Certification.Status.class, "status"); request.setAttribute("fixedFeeType", GuaranteeType.FeeType.FIXED); } @Override protected void validateForm(final ActionContext context) { final EditCertificationForm form = context.getForm(); final Certification certification = getDataBinder().readFromString(form.getCertification()); initialize(certification, context); certificationService.validate(certification); } /** * Filter by guarantee type's model equals to WITH_PAYMENT_OBLIGATION * @param guaranteeTypes */ private void filterGuaranteeTypes(final Collection<GuaranteeType> guaranteeTypes) { CollectionUtils.filter(guaranteeTypes, new Predicate() { @Override public boolean evaluate(final Object object) { return GuaranteeType.Model.WITH_PAYMENT_OBLIGATION == ((GuaranteeType) object).getModel(); } }); } private DataBinder<Certification> getDataBinder() { if (dataBinder == null) { final LocalSettings localSettings = settingsService.getLocalSettings(); final BeanBinder<Certification> binder = BeanBinder.instance(Certification.class); binder.registerBinder("id", PropertyBinder.instance(Long.class, "id", IdConverter.instance())); binder.registerBinder("guaranteeType", PropertyBinder.instance(GuaranteeType.class, "guaranteeType")); binder.registerBinder("amount", PropertyBinder.instance(BigDecimal.class, "amount", localSettings.getNumberConverter())); binder.registerBinder("buyer", PropertyBinder.instance(Member.class, "buyer")); binder.registerBinder("validity", DataBinderHelper.rawPeriodBinder(localSettings, "validity")); binder.registerBinder("status", PropertyBinder.instance(Certification.Status.class, "status")); dataBinder = binder; } return dataBinder; } private void initialize(final Certification certification, final ActionContext context) { // sets the logged user as the issuer certification.setIssuer(EntityHelper.reference(Member.class, ((Member) context.getAccountOwner()).getId())); } }