code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.binaryschema;
  
  import java.util.LinkedList;
  import java.util.Map;
  import java.util.Objects;
  import java.util.Optional;
  
  import com.google.common.base.MoreObjects;
  import com.google.common.base.Preconditions;
  import com.google.common.collect.ImmutableMap;
  import org.jetbrains.annotations.NotNull;
  import org.jetbrains.annotations.Nullable;
  
  public class Struct {
  
      private final String name;
      private final ImmutableMap<String, Member> members;
  
      public Struct(@NotNull String name, @NotNull Map<String, Member> members) {
          this(name, ImmutableMap.copyOf(members));
      }
  
      public Struct(@NotNull String name, @NotNull ImmutableMap<String, Member> members) {
          Preconditions.checkNotNull(name);
          Preconditions.checkNotNull(members);
  
          this.name = name;
          this.members = members;
      }
  
      @NotNull
      public String getName() {
          return name;
      }
  
      @NotNull
      public ImmutableMap<String, Member> getMembers() {
          return members;
      }
  
      @Nullable
      public Member getMember(String name) {
          return members.get(name);
      }
  
      @NotNull
      public Optional<Member> getMemberSafe(String name) {
          return Optional.ofNullable(members.get(name));
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          Struct that = (Struct) o;
          return Objects.equals(name, that.name) &&
              Objects.equals(members, that.members);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(name, members);
      }
  
      @Override
      public String toString() {
          return MoreObjects.toStringHelper(this)
              .add("name", name)
              .add("members", members)
              .toString();
      }
  
      public static Builder builder(String name) {
          return new Builder(name);
      }
  
      public static class Member {
          private final String name;
          private final Object value;
  
          public Member(String name, Object value) {
              this.name = name;
              this.value = value;
          }
  
          public String getName() {
              return name;
          }
  
          public Object getValue() {
              return value;
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
              Member member = (Member) o;
  
              if (value != null && value.getClass().isArray()) {
                  return Objects.equals(name, member.name) &&
                      Objects.deepEquals(value, member.value);
              } else {
                  return Objects.equals(name, member.name) &&
                      Objects.equals(value, member.value);
              }
          }
  
          @Override
          public int hashCode() {
              return Objects.hash(name, value);
          }
  
          @Override
          public String toString() {
              return MoreObjects.toStringHelper(this)
                  .add("name", name)
                  .add("value", value)
                  .toString();
          }
      }
  
      public static class Builder {
  
          private final String name;
          private final LinkedList<Struct.Member> members = new LinkedList<>();
  
          public Builder(String name) {
              this.name = name;
          }
  
          public Builder addMember(String name, Object value) {
              // Member can't contain another Member; it can contain
              // a Struct or any other kind of value type.
              Preconditions.checkArgument(!(value instanceof Member));
  
              members.add(new Struct.Member(name, value));
  
              return this;
          }
  
          public Struct build() {
              ImmutableMap.Builder<String, Member> mapBuilder = ImmutableMap.builder();
  
              members.forEach(m -> mapBuilder.put(m.name, m));
  
              return new Struct(name, mapBuilder.build());
          }
  
      }
  
  }
  