Package org.cyclop.service.completion.intern.parser.delete

Source Code of org.cyclop.service.completion.intern.parser.delete.WhereClauseCompletion

/*
* 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.cyclop.service.completion.intern.parser.delete;

import static org.cyclop.common.QueryHelper.extractTableName;

import java.util.Optional;
import java.util.SortedSet;

import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.inject.Named;

import org.cyclop.model.CqlColumnName;
import org.cyclop.model.CqlCompletion;
import org.cyclop.model.CqlKeyword;
import org.cyclop.model.CqlQuery;
import org.cyclop.model.CqlTable;
import org.cyclop.service.cassandra.QueryService;
import org.cyclop.service.completion.intern.parser.MarkerBasedCompletion;

/** @author Maciej Miklas */
@Named("delete.WhereClauseCompletion")
class WhereClauseCompletion extends MarkerBasedCompletion {

  @Inject
  private QueryService queryService;

  private CqlCompletion.BuilderTemplate builderTemplate;

  public WhereClauseCompletion() {
    super(CqlKeyword.Def.WHERE.value);
  }

  @PostConstruct
  public void init() {
    builderTemplate = CqlCompletion.Builder.naturalOrder().all(CqlKeyword.Def.AND.value)
        .full(CqlKeyword.Def.IN_BL.value).min(CqlKeyword.Def.IN.value).template();
  }

  @Override
  public CqlCompletion getCompletion(CqlQuery query) {
    CqlCompletion.Builder builder = builderTemplate.naturalOrder();

    Optional<CqlTable> table = extractTableName(CqlKeyword.Def.FROM.value, query);
    SortedSet<CqlColumnName> columnNames = queryService.findColumnNames(table);
    builder.all(columnNames);

    CqlCompletion cmp = builder.build();
    return cmp;
  }

}
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