Created a ManagedZoneInfo class as part of the model.

gcloud-java-dns/src/main/java/com/google/gcloud/dns/ManagedZoneInfo.java

@@ -0,0 +1,334 @@
+/*
+ * Copyright 2016 Google Inc. All Rights Reserved.
+ *
+ * Licensed 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 com.google.gcloud.dns;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.collect.ImmutableList;
+
+import org.joda.time.DateTime;
+import org.joda.time.format.ISODateTimeFormat;
+
+import java.io.Serializable;
+import java.math.BigInteger;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * This class is a container for the managed zone metainformation. Managed zone is a resource that
+ * represents a DNS zone hosted by the Cloud DNS service. See <a href="https://cloud.google.com/dns/api/v1/managedZones">Google
+ * Cloud DNS documentation</a> for more information.
+ */
+public class ManagedZoneInfo implements Serializable {
+
+  private static final long serialVersionUID = 201601191647L;
+  private final String name;
+  private final Long id;
+  private final Long creationTimeMillis;
+  private final String dnsName;
+  private final String description;
+  private final String nameServerSet;
+  private final List<String> nameServers;
+
+  /**
+   * A builder for {@code ManagedZoneInfo}.
+   */
+  public static class Builder {
+    private String name;
+    private Long id;
+    private Long creationTimeMillis;
+    private String dnsName;
+    private String description;
+    private String nameServerSet;
+    private List<String> nameServers = new LinkedList<>();
+
+    private Builder() {
+    }
+
+    private Builder(Long id) {
+      this.id = checkNotNull(id);
+    }
+
+    private Builder(String name) {
+      this.name = checkNotNull(name);
+    }
+
+    private Builder(String name, Long id) {
+      this.name = checkNotNull(name);
+      this.id = checkNotNull(id);
+    }
+
+    /**
+     * Creates a builder from an existing ManagedZoneInfo object.
+     */
+    Builder(ManagedZoneInfo info) {
+      this.name = info.name;
+      this.id = info.id;
+      this.creationTimeMillis = info.creationTimeMillis;
+      this.dnsName = info.dnsName;
+      this.description = info.description;
+      this.nameServerSet = info.nameServerSet;
+      this.nameServers.addAll(info.nameServers);
+    }
+
+    /**
+     * Sets a mandatory user-provided name for the zone. It must be unique within the project.
+     */
+    public Builder name(String name) {
+      this.name = checkNotNull(name);
+      return this;
+    }
+
+    /**
+     * Sets an id for the managed zone which is assigned to the managed zone by the server.
+     */
+    public Builder id(long id) {
+      this.id = id;
+      return this;
+    }
+
+    /**
+     * Sets the time when this managed zone was created.
+     */
+    Builder creationTimeMillis(long creationTimeMillis) {
+      checkArgument(creationTimeMillis >= 0, "The timestamp cannot be negative.");
+      this.creationTimeMillis = creationTimeMillis;
+      return this;
+    }
+
+    /**
+     * Sets a mandatory DNS name of this managed zone, for instance "example.com.".
+     */
+    public Builder dnsName(String dnsName) {
+      this.dnsName = checkNotNull(dnsName);
+      return this;
+    }
+
+    /**
+     * Sets a mandatory description for this managed zone. The value is a string of at most 1024
+     * characters (this limit is posed by Google Cloud DNS; gcloud-java does not enforce the limit)
+     * which has no effect on the managed zone's function.
+     */
+    public Builder description(String description) {
+      this.description = checkNotNull(description);
+      return this;
+    }
+
+    /**
+     * Optionally specifies the NameServerSet for this managed zone. A NameServerSet is a set of DNS
+     * name servers that all host the same ManagedZones.
+     */
+    public Builder nameServerSet(String nameServerSet) {
+      // todo(mderka) add more to the doc when questions are answered by the service owner
+      this.nameServerSet = checkNotNull(nameServerSet);
+      return this;
+    }
+
+    /**
+     * Sets a list of servers that hold the information about the managed zone. This information is
+     * provided by Google Cloud DNS and is read only.
+     */
+    Builder nameServers(List<String> nameServers) {
+      this.nameServers.addAll(checkNotNull(nameServers));
+      return this;
+    }
+
+    /**
+     * Removes all the nameservers from the list.
+     */
+    Builder clearNameServers() {
+      this.nameServers.clear();
+      return this;
+    }
+
+    /**
+     * Builds the instance of ManagedZoneInfo based on the information set here.
+     */
+    public ManagedZoneInfo build() {
+      return new ManagedZoneInfo(this);
+    }
+  }
+
+  private ManagedZoneInfo(Builder builder) {
+    this.name = builder.name;
+    this.id = builder.id;
+    this.creationTimeMillis = builder.creationTimeMillis;
+    this.dnsName = builder.dnsName;
+    this.description = builder.description;
+    this.nameServerSet = builder.nameServerSet;
+    this.nameServers = ImmutableList.copyOf(builder.nameServers);
+  }
+
+  /**
+   * Returns a builder for {@code ManagedZoneInfo} with an assigned {@code name}.
+   */
+  public static Builder builder(String name) {
+    return new Builder(name);
+  }
+
+  /**
+   * Returns a builder for {@code ManagedZoneInfo} with an assigned {@code id}.
+   */
+  public static Builder builder(Long id) {
+    return new Builder(id);
+  }
+
+  /**
+   * Returns a builder for {@code ManagedZoneInfo} with an assigned {@code name} and {@code id}.
+   */
+  public static Builder builder(String name, Long id) {
+    return new Builder(name, id);
+  }
+
+  /**
+   * Returns an empty builder for {@code ManagedZoneInfo}. We use it internally in {@code toPb()}.
+   */
+  private static Builder builder() {
+    return new Builder();
+  }
+
+  /**
+   * Returns the user-defined name of the managed zone.
+   */
+  public String name() {
+    return name;
+  }
+
+  /**
+   * Returns the read-only managed zone id assigned by the server.
+   */
+  public Long id() {
+    return id;
+  }
+
+  /**
+   * Returns the time when this time that this managed zone was created on the server.
+   */
+  public Long creationTimeMillis() {
+    return creationTimeMillis;
+  }
+
+  /**
+   * Returns the DNS name of this managed zone, for instance "example.com.".
+   */
+  public String dnsName() {
+    return dnsName;
+  }
+
+  /**
+   * Returns the description of this managed zone. This is at most 1024 long mandatory string
+   * provided by the user.
+   */
+  public String description() {
+    return description;
+  }
+
+  /**
+   * Returns the optionally specified set of DNS name servers that all host this managed zone.
+   */
+  public String nameServerSet() {
+    // todo(mderka) update this doc after finding out more about this from the service owners
+    return nameServerSet;
+  }
+
+  /**
+   * The nameservers that the managed zone should be delegated to. This is defined by the Google DNS
+   * cloud.
+   */
+  public List<String> nameServers() {
+    return nameServers;
+  }
+
+  /**
+   * Returns a builder for {@code ManagedZoneInfo} prepopulated with the metadata of this managed
+   * zone.
+   */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  com.google.api.services.dns.model.ManagedZone toPb() {
+    com.google.api.services.dns.model.ManagedZone pb =
+        new com.google.api.services.dns.model.ManagedZone();
+    pb.setDescription(this.description());
+    pb.setDnsName(this.dnsName());
+    if (this.id() != null) {
+      pb.setId(BigInteger.valueOf(this.id()));
+    }
+    pb.setName(this.name());
+    pb.setNameServers(this.nameServers());
+    pb.setNameServerSet(this.nameServerSet());
+    if (this.creationTimeMillis() != null) {
+      pb.setCreationTime(ISODateTimeFormat.dateTime()
+          .withZoneUTC()
+          .print(this.creationTimeMillis()));
+    }
+    return pb;
+  }
+
+  static ManagedZoneInfo fromPb(com.google.api.services.dns.model.ManagedZone pb) {
+    Builder b = builder();
+    if (pb.getDescription() != null) {
+      b.description(pb.getDescription());
+    }
+    if (pb.getDnsName() != null) {
+      b.dnsName(pb.getDnsName());
+    }
+    if (pb.getId() != null) {
+      b.id(pb.getId().longValue());
+    }
+    if (pb.getName() != null) {
+      b.name(pb.getName());
+    }
+    if (pb.getNameServers() != null) {
+      b.nameServers(pb.getNameServers());
+    }
+    if (pb.getNameServerSet() != null) {
+      b.nameServerSet(pb.getNameServerSet());
+    }
+    if (pb.getCreationTime() != null) {
+      b.creationTimeMillis(DateTime.parse(pb.getCreationTime()).getMillis());
+    }
+    return b.build();
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    return obj instanceof ManagedZoneInfo && Objects.equals(toPb(), ((ManagedZoneInfo) obj).toPb());
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, id, creationTimeMillis, dnsName,
+        description, nameServerSet, nameServers);
+  }
+
+  @Override
+  public String toString() {
+    return MoreObjects.toStringHelper(this)
+        .add("name", name())
+        .add("id", id())
+        .add("description", description())
+        .add("dnsName", dnsName())
+        .add("nameServerSet", nameServerSet())
+        .add("nameServers", nameServers())
+        .toString();
+  }
+}