DataSource.java

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// Copyright 2014 Cloudera Inc.
//
// 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.cloudera.impala.catalog;

import org.apache.hadoop.fs.Path;

import com.cloudera.impala.thrift.TCatalogObjectType;
import com.cloudera.impala.thrift.TDataSource;
import com.google.common.base.Objects;

public class DataSource implements CatalogObject {
  private final String dataSrcName_;
  private final String className_;
  private final String apiVersionString_;
  // Qualified path to the data source.
  private final String location_;
  private long catalogVersion_ =  Catalog.INITIAL_CATALOG_VERSION;

  public DataSource(String dataSrcName, String location, String className,
      String apiVersionString) {
    dataSrcName_ = dataSrcName;
    location_ = location;
    className_ = className;
    apiVersionString_ = apiVersionString;
  }

  public static DataSource fromThrift(TDataSource thrift) {
    return new DataSource(thrift.getName(), thrift.getHdfs_location(),
        thrift.getClass_name(), thrift.getApi_version());
  }

  @Override
  public TCatalogObjectType getCatalogObjectType() {
    return TCatalogObjectType.DATA_SOURCE;
  }

  @Override
  public long getCatalogVersion() { return catalogVersion_; }

  @Override
  public void setCatalogVersion(long newVersion) { catalogVersion_ = newVersion; }

  @Override
  public String getName() { return dataSrcName_; }

  @Override
  public boolean isLoaded() { return true; }

  public String getLocation() { return location_; }
  public String getClassName() { return className_; }
  public String getApiVersion() { return apiVersionString_; }

  public TDataSource toThrift() {
    return new TDataSource(getName(), location_, className_, apiVersionString_);
  }

  public String debugString() {
    return Objects.toStringHelper(this)
        .add("name", dataSrcName_)
        .add("location", location_)
        .add("className", className_)
        .add("apiVersion", apiVersionString_)
        .toString();
  }

  public static String debugString(TDataSource thrift) {
    return fromThrift(thrift).debugString();
  }
}