content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.v1.model.instance;
  
  import com.fasterxml.jackson.annotation.JsonAutoDetect;
  import com.fasterxml.jackson.annotation.JsonIgnore;
  import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
  import com.fasterxml.jackson.annotation.JsonInclude;
  import org.apache.atlas.model.typedef.AtlasBaseTypeDef;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlRootElement;
  
  import java.io.Serializable;
  import java.text.ParseException;
  import java.util.Date;
  import java.util.List;
  import java.util.Map;
  import java.util.Objects;
  import java.util.concurrent.atomic.AtomicLong;
  
  import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.NONE;
  import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.PUBLIC_ONLY;
  
  @JsonAutoDetect(getterVisibility = PUBLIC_ONLY, setterVisibility = PUBLIC_ONLY, fieldVisibility = NONE)
  @JsonInclude(JsonInclude.Include.ALWAYS)
  @JsonIgnoreProperties(ignoreUnknown = true)
  @XmlRootElement
  @XmlAccessorType(XmlAccessType.PROPERTY)
  public class Id implements Serializable {
      private static final long serialVersionUID = 1L;
  
      public static final String JSON_CLASS_ID = "org.apache.atlas.typesystem.json.InstanceSerialization$_Id";
  
      @JsonIgnore
      private static final AtomicLong s_nextId = new AtomicLong(System.nanoTime());
  
      private String     id;
      private String      typeName;
      private int         version;
      private EntityState state;
  
      public Id() {
      }
  
      public Id(Id that) {
          if (that != null) {
              this.id       = that.id;
              this.typeName = that.typeName;
              this.version  = that.version;
              this.state    = that.state;
          }
      }
  
      public Id(String typeName) {
          this("" + nextNegativeLong(), 0, typeName);
      }
  
      public Id(String id, int version, String typeName) {
          this(id, version, typeName, null);
      }
  
      public Id(long id, int version, String typeName) {
          this(id, version, typeName, null);
      }
  
      public Id(long id, int version, String typeName, String state) {
          this("" + id, version, typeName, state);
      }
  
      public Id(String id, int version, String typeName, String state) {
          this.id       = id;
          this.typeName = typeName;
          this.version  = version;
          this.state    = state == null ? EntityState.ACTIVE : EntityState.valueOf(state.toUpperCase());
      }
  
      public Id(Map<String, Object> map) {
          this();
  
          if (map != null) {
              this.id       = Id.asString(map.get("id"));
              this.typeName = Id.asString(map.get("typeName"));
              this.version  = Id.asInt(map.get("id"));
              this.state    = Id.asEntityState(map.get("state"));
          }
      }
  
      static String asString(Object val) {
          return val == null ? null : val.toString();
      }
  
      static int asInt(Object val) {
          if (val != null) {
              if (val instanceof Number) {
                  return ((Number) val).intValue();
              }
  
              try {
                  return Integer.parseInt(val.toString());
              } catch (NumberFormatException excp) {
                  // ignore
              }
          }
  
          return 0;
      }
  
      static Date asDate(Object val) {
          if (val != null) {
              if (val instanceof Date) {
                  return (Date) val;
              } else if (val instanceof Number) {
                  return new Date(((Number) val).longValue());
              }
  
              try {
                  return AtlasBaseTypeDef.getDateFormatter().parse(val.toString());
              } catch (ParseException excp) {
                  // ignore
              }
          }
  
          return null;
      }
  
      static EntityState asEntityState(Object val) {
          if (val != null) {
              if (val instanceof EntityState) {
                  return (EntityState) val;
              }
  
              try {
                  return EntityState.valueOf(val.toString());
              } catch (Exception excp) {
                  // ignore
              }
          }
  
          return EntityState.ACTIVE;
      }
  
      static Map asMap(Object val) {
          return (val instanceof Map) ? ((Map) val) : null;
      }
  
      static List asList(Object val) {
          return (val instanceof List) ? ((List) val) : null;
      }
  
      // for serialization backward compatibility
      public String getJsonClass() {
          return JSON_CLASS_ID;
      }
  
      public String getId() {
          return id;
      }
  
      public void setId(String id) {
          this.id = id;
      }
  
      public String getTypeName() {
          return typeName;
      }
  
      public void setTypeName(String typeName) {
          this.typeName = typeName;
      }
  
      public int getVersion() {
          return version;
      }
  
      public void setVersion(int version) {
          this.version = version;
      }
  
      public EntityState getState() {
          return state;
      }
  
      public void setState(EntityState state) {
          this.state = state;
      }
  
      @JsonIgnore
      public String _getId() {
          return id;
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(id, typeName, version, state);
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          } else if (o == null || getClass() != o.getClass()) {
              return false;
          }
  
          Id obj = (Id) o;
  
          return version == obj.version &&
                  Objects.equals(id, obj.id) &&
                  Objects.equals(typeName, obj.typeName) &&
                  Objects.equals(state, obj.state);
      }
  
      @Override
      public String toString() {
          return asString(new StringBuilder()).toString();
      }
  
      public StringBuilder asString(StringBuilder sb) {
          if (sb == null) {
              sb = new StringBuilder();
          }
  
          sb.append("Id{")
                  .append("id=").append(id)
                  .append(", typeName=").append(typeName)
                  .append(", version=").append(version)
                  .append(", state=").append(state)
                  .append("}");
  
          return sb;
      }
  
      private static long nextNegativeLong() {
          long ret = s_nextId.getAndDecrement();
  
          if (ret > 0) {
              ret *= -1;
          } else if (ret == 0) {
              ret = Long.MIN_VALUE;
          }
  
          return ret;
      }
  
      public enum EntityState { ACTIVE, DELETED }
  }
  