| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.bval.jsr.groups; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.LinkedHashSet; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.function.Function; |
| import java.util.function.Predicate; |
| |
| import javax.validation.GroupDefinitionException; |
| import javax.validation.groups.Default; |
| |
| import org.apache.bval.util.Exceptions; |
| import org.apache.bval.util.ObjectWrapper; |
| |
| /** |
| * Immutable object that wraps an interface representing a single group. |
| */ |
| public final class Group implements GroupStrategy { |
| /** |
| * Models a group sequence. |
| */ |
| public static final class Sequence extends GroupStrategy.Composite { |
| private static Set<Group> validGroups(Collection<Group> groups, Function<Group, ? extends GroupStrategy> mapper) { |
| final Set<Group> result = new LinkedHashSet<>(); |
| final ObjectWrapper<Group> prev = new ObjectWrapper<>(); |
| |
| groups.stream().map(g -> Optional.of(g).<GroupStrategy> map(mapper).orElse(g)).map(GroupStrategy::getGroups) |
| .flatMap(Collection::stream).forEach(g -> { |
| // only permit duplicates if they are contiguous: |
| if (result.add(g)) { |
| prev.accept(g); |
| return; |
| } |
| if (!g.equals(prev.get())) { |
| Exceptions.raise(GroupDefinitionException::new, "Invalid group sequence %s specified", groups); |
| } |
| }); |
| return result; |
| } |
| |
| private final Set<Group> groups; |
| |
| private Sequence(Collection<Group> groups) { |
| super(groups, true); |
| this.groups = Collections.unmodifiableSet(validGroups(groups, Function.identity())); |
| } |
| |
| @Override |
| public Set<Group> getGroups() { |
| return groups; |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("Group sequence: %s", groups); |
| } |
| |
| @Override |
| public GroupStrategy redefining(Map<Group, ? extends GroupStrategy> redefinitions) { |
| if (Collections.disjoint(redefinitions.keySet(), groups)) { |
| return this; |
| } |
| final Set<GroupStrategy> components = new LinkedHashSet<>(); |
| |
| final Set<Group> mappedGroups; |
| try { |
| mappedGroups = validGroups(groups, g -> { |
| final GroupStrategy result = Optional.of(g).<GroupStrategy> map(redefinitions::get).orElse(g); |
| components.add(result); |
| return result; |
| }); |
| } catch (GroupDefinitionException e) { |
| throw Exceptions.create(GroupDefinitionException::new, "Could not expand %s using %s", this, |
| redefinitions); |
| } |
| if (components.equals(mappedGroups)) { |
| return new Sequence(mappedGroups); |
| } |
| return new GroupStrategy.Composite(components, ordered); |
| } |
| } |
| |
| /** |
| * the Default Group |
| */ |
| public static final Group DEFAULT = new Group(Default.class); |
| |
| public static final Group of(Class<?> group) { |
| return new Group(group); |
| } |
| |
| public static final Sequence sequence(Group... groups) { |
| return sequence(Arrays.asList(groups)); |
| } |
| |
| public static final Sequence sequence(Collection<Group> groups) { |
| return new Sequence(groups); |
| } |
| |
| private final Class<?> group; |
| |
| /** |
| * Create a new Group instance. |
| * @param group |
| */ |
| public Group(Class<?> group) { |
| this.group = group; |
| } |
| |
| /** |
| * Get the actual group class. |
| * @return |
| */ |
| public Class<?> getGroup() { |
| return group; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String toString() { |
| return String.format("%s{group=%s}", Group.class.getSimpleName(), group); |
| } |
| |
| /** |
| * Learn whether the group represented is the default group. |
| * @return boolean |
| */ |
| public boolean isDefault() { |
| return Default.class.equals(group); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean equals(Object o) { |
| return this == o || o != null && getClass().equals(o.getClass()) && Objects.equals(group, ((Group) o).group); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int hashCode() { |
| return group.hashCode(); |
| } |
| |
| @Override |
| public Set<Group> getGroups() { |
| return Collections.singleton(this); |
| } |
| |
| @Override |
| public boolean applyTo(Predicate<GroupStrategy> operation) { |
| return operation.test(this); |
| } |
| |
| @Override |
| public GroupStrategy redefining(Map<Group, ? extends GroupStrategy> redefinitions) { |
| final GroupStrategy redefined = redefinitions.get(this); |
| return redefined == null ? this : redefined; |
| } |
| } |