Java tutorial
/* * This file is part of LibrePlan * * Copyright (C) 2009-2010 Fundacin para o Fomento da Calidade Industrial e * Desenvolvemento Tecnolxico de Galicia * Copyright (C) 2010-2011 Igalia, S.L. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.libreplan.business.materials.entities; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.HashSet; import java.util.List; import java.util.Set; import org.apache.commons.lang3.StringUtils; import javax.validation.constraints.AssertTrue; import org.hibernate.validator.constraints.NotEmpty; import javax.validation.constraints.NotNull; import javax.validation.Valid; import org.libreplan.business.common.IntegrationEntity; import org.libreplan.business.common.Registry; import org.libreplan.business.common.entities.EntitySequence; import org.libreplan.business.common.exceptions.InstanceNotFoundException; import org.libreplan.business.materials.daos.IMaterialCategoryDAO; /** * MaterialCategory entity. * * @author Jacobo Aragunde Perez <jaragunde@igalia.com> */ public class MaterialCategory extends IntegrationEntity { public static List<Material> getAllMaterialsFrom(Collection<? extends MaterialCategory> categories) { List<Material> result = new ArrayList<>(); for (MaterialCategory each : categories) { result.addAll(each.getMaterials()); } return result; } public static List<Material> getAllMaterialsWithoutAutogeneratedCodeFrom( Collection<? extends MaterialCategory> categories) { List<Material> result = new ArrayList<>(); for (MaterialCategory each : categories) { if (!each.isCodeAutogenerated()) { result.addAll(each.getMaterials()); } } return result; } @NotEmpty private String name; private MaterialCategory parent = null; @Valid private Set<MaterialCategory> subcategories = new HashSet<MaterialCategory>(); @Valid private Set<Material> materials = new HashSet<Material>(); private Integer lastMaterialSequenceCode = 0; // Default constructor, needed by Hibernate protected MaterialCategory() { } public static MaterialCategory create(String name) { return create(new MaterialCategory(name)); } public static MaterialCategory createUnvalidated(String code, String name) { MaterialCategory materialCategory = create(new MaterialCategory(), code); materialCategory.name = name; return materialCategory; } public void updateUnvalidated(String name) { if (!StringUtils.isBlank(name)) { this.name = name; } } protected MaterialCategory(String name) { this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } public MaterialCategory getParent() { return parent; } public void setParent(MaterialCategory parent) { this.parent = parent; } public Set<MaterialCategory> getSubcategories() { return Collections.unmodifiableSet(subcategories); } public void addSubcategory(MaterialCategory subcategory) { subcategories.add(subcategory); subcategory.setParent(this); } public void removeSubcategory(MaterialCategory subcategory) { subcategories.remove(subcategory); } public Set<Material> getMaterials() { return Collections.unmodifiableSet(materials); } public void addMaterial(Material material) { materials.add(material); material.setCategory(this); } public void removeMaterial(Material material) { material.setCategory(null); materials.remove(material); } @AssertTrue(message = "material category name has to be unique. It is already used") public boolean isUniqueNameConstraint() { boolean result; if (isNewObject()) { result = !existsMaterialCategoryWithTheName(); } else { result = isIfExistsTheExistentMaterialCategoryThisOne(); } return result; } private boolean existsMaterialCategoryWithTheName() { IMaterialCategoryDAO materialCategoryDAO = Registry.getMaterialCategoryDAO(); return materialCategoryDAO.existsMaterialCategoryWithNameInAnotherTransaction(name); } private boolean isIfExistsTheExistentMaterialCategoryThisOne() { IMaterialCategoryDAO materialCategoryDAO = Registry.getMaterialCategoryDAO(); try { MaterialCategory materialCategory = materialCategoryDAO.findUniqueByNameInAnotherTransaction(name); return materialCategory.getId().equals(getId()); } catch (InstanceNotFoundException e) { return true; } } public Material getMaterialByCode(String code) throws InstanceNotFoundException { if (StringUtils.isBlank(code)) { throw new InstanceNotFoundException(code, Material.class.getName()); } for (Material m : this.materials) { if (m.getCode().equalsIgnoreCase(StringUtils.trim(code))) { return m; } } throw new InstanceNotFoundException(code, Material.class.getName()); } public MaterialCategory getSubcategoryByCode(String code) throws InstanceNotFoundException { if (StringUtils.isBlank(code)) { throw new InstanceNotFoundException(code, MaterialCategory.class.getName()); } for (MaterialCategory s : this.subcategories) { if (s.getCode().equalsIgnoreCase(StringUtils.trim(code))) { return s; } } throw new InstanceNotFoundException(code, MaterialCategory.class.getName()); } @Override protected IMaterialCategoryDAO getIntegrationEntityDAO() { return Registry.getMaterialCategoryDAO(); } @SuppressWarnings("unused") @AssertTrue(message = "Subcategory names must be unique.") public boolean isUniqueSubcategoryNameConstraint() { Set<String> subcategoriesNames = new HashSet<>(); for (MaterialCategory mc : this.getAllSubcategories()) { if (!StringUtils.isBlank(mc.getName())) { String name = StringUtils.deleteWhitespace(mc.getName().toLowerCase()); if (subcategoriesNames.contains(name)) { return false; } else { subcategoriesNames.add(name); } } } return true; } @AssertTrue(message = "There are repeated material category codes") public boolean isNonRepeatedMaterialCategoryCodesConstraint() { Set<MaterialCategory> allSubcategories = getAllSubcategories(); allSubcategories.add(this); return getFirstRepeatedCode(allSubcategories) == null; } private Set<MaterialCategory> getAllSubcategories() { Set<MaterialCategory> result = new HashSet<>(subcategories); for (MaterialCategory subcategory : subcategories) { result.addAll(subcategory.getAllSubcategories()); } return result; } @AssertTrue(message = "There are repeated material codes") public boolean isNonRepeatedMaterialCodesConstraint() { Set<Material> allMaterials = getAllMaterials(); return getFirstRepeatedCode(allMaterials) == null; } private Set<Material> getAllMaterials() { Set<Material> result = new HashSet<>(materials); for (MaterialCategory subcategory : subcategories) { result.addAll(subcategory.getAllMaterials()); } return result; } public void generateMaterialCodes(int numberOfDigits) { for (Material material : this.getMaterials()) { if ((material.getCode() == null) || (material.getCode().isEmpty()) || (!material.getCode().startsWith(this.getCode()))) { this.incrementLastMaterialSequenceCode(); String materialCode = EntitySequence.formatValue(numberOfDigits, this.getLastMaterialSequenceCode()); material.setCode(this.getCode() + EntitySequence.CODE_SEPARATOR_CHILDREN + materialCode); } } } public void incrementLastMaterialSequenceCode() { if (this.lastMaterialSequenceCode == null) { this.lastMaterialSequenceCode = 0; } this.lastMaterialSequenceCode++; } @NotNull(message = "last material sequence code not specified") public Integer getLastMaterialSequenceCode() { return lastMaterialSequenceCode; } @Override public String toString() { return super.toString() + " :: " + getName(); } }