/*
 * 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.phoenix.parse;

import org.apache.hadoop.hbase.HConstants;
import org.apache.phoenix.coprocessor.generated.PSchemaProtos;
import org.apache.phoenix.schema.PMetaDataEntity;
import org.apache.phoenix.schema.PName;
import org.apache.phoenix.schema.PNameFactory;
import org.apache.phoenix.schema.PTableKey;
import org.apache.phoenix.util.SchemaUtil;
import org.apache.phoenix.util.SizedUtil;

public class PSchema implements PMetaDataEntity {

  private final PName schemaName;
  private PTableKey schemaKey;
  private long timeStamp;
  private int estimatedSize;

  public PSchema(long timeStamp) { // For index delete marker
    this.timeStamp = timeStamp;
    this.schemaName = null;
  }

  public PSchema(String schemaName) {
    this(schemaName, HConstants.LATEST_TIMESTAMP);
  }

  public PSchema(String schemaName, long timeStamp) {
    this.schemaName = PNameFactory.newName(SchemaUtil.normalizeIdentifier(schemaName));
    this.schemaKey = new PTableKey(null, this.schemaName.getString());
    this.timeStamp = timeStamp;
    this.estimatedSize =
      SizedUtil.INT_SIZE + SizedUtil.LONG_SIZE + PNameFactory.getEstimatedSize(this.schemaName);
  }

  public PSchema(PSchema schema) {
    this(schema.getSchemaName().toString(), schema.getTimeStamp());
  }

  public String getSchemaName() {
    return schemaName == null ? null : schemaName.getString();
  }

  public PTableKey getSchemaKey() {
    return schemaKey;
  }

  public long getTimeStamp() {
    return timeStamp;
  }

  public static PSchemaProtos.PSchema toProto(PSchema schema) {
    PSchemaProtos.PSchema.Builder builder = PSchemaProtos.PSchema.newBuilder();
    builder.setSchemaName(schema.getSchemaName());
    builder.setTimeStamp(schema.getTimeStamp());
    return builder.build();
  }

  public static PSchema createFromProto(PSchemaProtos.PSchema schema) {
    long timeStamp = schema.getTimeStamp();
    String schemaName = schema.getSchemaName();
    return new PSchema(schemaName, timeStamp);
  }

  public int getEstimatedSize() {
    return estimatedSize;
  }

}
