Package cascading.lingual.catalog.target

Source Code of cascading.lingual.catalog.target.FormatTarget

/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* 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 cascading.lingual.catalog.target;

import java.util.Collection;
import java.util.List;
import java.util.Map;

import cascading.lingual.catalog.CatalogOptions;
import cascading.lingual.catalog.Format;
import cascading.lingual.catalog.FormatProperties;
import cascading.lingual.catalog.SchemaCatalog;
import cascading.lingual.catalog.SchemaDef;
import cascading.lingual.catalog.builder.FormatBuilder;
import cascading.lingual.common.Printer;
import cascading.lingual.platform.PlatformBroker;

import static java.util.Arrays.asList;
import static java.util.Collections.emptyList;

/**
*
*/
public class FormatTarget extends CRUDTarget
  {
  public FormatTarget( Printer printer, CatalogOptions options )
    {
    super( printer, options );
    }

  @Override
  protected boolean performRename( PlatformBroker platformBroker )
    {
    SchemaCatalog catalog = platformBroker.getSchemeCatalog();
    String schemaName = getOptions().getSchemaName();
    Format oldFormat = getSource( platformBroker );
    Format newFormat = Format.getFormat( getOptions().getRenameName() );

    if( oldFormat == null )
      return false;

    return catalog.renameFormat( schemaName, oldFormat, newFormat );
    }

  @Override
  protected boolean performRemove( PlatformBroker platformBroker )
    {
    SchemaCatalog catalog = platformBroker.getSchemeCatalog();
    String schemaName = getOptions().getSchemaName();
    Format format = getSource( platformBroker );

    return catalog.removeFormat( schemaName, format );
    }

  @Override
  protected Format getSource( PlatformBroker platformBroker )
    {
    SchemaCatalog catalog = platformBroker.getSchemeCatalog();

    if( getRequestedSourceName() == null )
      return null;

    Format format = Format.getFormat( getRequestedSourceName() );

    if( !catalog.getSchemaDefinedFormats( getOptions().getSchemaName() ).contains( format ) )
      return null;

    return format;
    }

  @Override
  protected String getRequestedSourceName()
    {
    return getOptions().getFormatName();
    }

  @Override
  protected List<String> performUpdate( PlatformBroker platformBroker )
    {
    String formatName = getOptions().getFormatName();

    if( formatName == null )
      throw new IllegalArgumentException( "update action must have a format name value" );

    Format format = getSource( platformBroker );

    if( format == null )
      return emptyList();

    SchemaCatalog catalog = platformBroker.getSchemeCatalog();
    String schemaName = getOptions().getSchemaName();
    String providerName = getOptions().getProviderName();

    if( providerName == null )
      providerName = joinOrNull( catalog.getFormatProperty( schemaName, format, FormatProperties.PROVIDER ) );

    if( providerName == null )
      throw new IllegalArgumentException( "provider is required" );

    return performAdd( platformBroker );
    }

  @Override
  protected void validateAdd( PlatformBroker platformBroker )
    {
    String formatName = getRequestedSourceName();

    if( formatName == null )
      throw new IllegalArgumentException( "add action must have a valid format name value" );

    String providerName = getOptions().getProviderName();

    if( providerName == null )
      throw new IllegalArgumentException( "provider is required" );

    SchemaCatalog catalog = platformBroker.getSchemeCatalog();
    String schemaName = getOptions().getSchemaName();

    validateProviderName( catalog, schemaName, providerName );
    }

  @Override
  protected List<String> performAdd( PlatformBroker platformBroker )
    {
    SchemaCatalog catalog = platformBroker.getSchemeCatalog();
    Format format = Format.getFormat( getOptions().getFormatName() );
    String schemaName = getOptions().getSchemaName();
    Map<String, String> properties = getOptions().getProperties();
    List<String> extensions = getOptions().getExtensions();
    String providerName = getOptions().getProviderName();

    catalog.addUpdateFormat( schemaName, format, extensions, properties, providerName );

    return asList( format.getName() );
    }

  @Override
  protected Collection<String> performGetNames( PlatformBroker platformBroker )
    {
    SchemaCatalog catalog = platformBroker.getSchemeCatalog();
    String schemaName = getOptions().getSchemaName();

    return catalog.getFormatNames( schemaName );
    }

  @Override
  protected Map performShow( PlatformBroker platformBroker )
    {
    Format format = Format.getFormat( getRequestedSourceName() );
    SchemaCatalog catalog = platformBroker.getSchemeCatalog();
    SchemaDef schemaDef = getSchemaDefChecked( catalog, getOptions().getSchemaName(), true );

    if( !schemaDef.getAllFormats().contains( format ) )
      return null;

    return new FormatBuilder( schemaDef, getOptions().getProviderName() ).format( format );
    }
  }
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