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
   *
   *     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.datastax.oss.driver.internal.querybuilder.select;
  
  import com.datastax.oss.driver.api.core.CqlIdentifier;
  import com.datastax.oss.driver.api.querybuilder.select.Selector;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import edu.umd.cs.findbugs.annotations.Nullable;
  import net.jcip.annotations.Immutable;
  
  @Immutable
  public class FunctionSelector extends CollectionSelector {
  
    private final CqlIdentifier keyspaceId;
    private final CqlIdentifier functionId;
  
    public FunctionSelector(
        @Nullable CqlIdentifier keyspaceId,
        @NonNull CqlIdentifier functionId,
        @NonNull Iterable<Selector> arguments) {
      this(keyspaceId, functionId, arguments, null);
    }
  
    public FunctionSelector(
        @Nullable CqlIdentifier keyspaceId,
        @NonNull CqlIdentifier functionId,
        @NonNull Iterable<Selector> elementSelectors,
        @Nullable CqlIdentifier alias) {
      super(elementSelectors, buildOpening(keyspaceId, functionId), ")", alias);
      this.keyspaceId = keyspaceId;
      this.functionId = functionId;
    }
  
    @NonNull
    @Override
    public Selector as(@NonNull CqlIdentifier alias) {
      return new FunctionSelector(keyspaceId, functionId, getElementSelectors(), alias);
    }
  
    @Nullable
    public CqlIdentifier getKeyspaceId() {
      return keyspaceId;
    }
  
    @NonNull
    public CqlIdentifier getFunctionId() {
      return functionId;
    }
  
    /** Returns the arguments of the function. */
    @NonNull
    @Override
    public Iterable<Selector> getElementSelectors() {
      // Overridden only to customize the javadoc
      return super.getElementSelectors();
    }
  
    private static String buildOpening(CqlIdentifier keyspaceId, CqlIdentifier functionId) {
      return (keyspaceId == null)
          ? functionId.asCql(true) + "("
          : keyspaceId.asCql(true) + "." + functionId.asCql(true) + "(";
    }
  }
  