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
   *
   *    https://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.cayenne.dba.firebird.sqltree;
  
  import org.apache.cayenne.access.sqlbuilder.QuotingAppendable;
  import org.apache.cayenne.access.sqlbuilder.sqltree.FunctionNode;
  import org.apache.cayenne.access.sqlbuilder.sqltree.Node;
  
  /**
   * SUBSTRING function for Firebird
   *
   * It has following format:
   *
   * SUBSTRING (string FROM CAST(? AS INTEGER) FOR CAST(? AS INTEGER))
   *
   * @since 4.1
   */
  public class FirebirdSubstringFunctionNode extends FunctionNode {
      public FirebirdSubstringFunctionNode(String alias) {
          super("SUBSTRING", alias);
      }
  
      @Override
      public void appendChildrenSeparator(QuotingAppendable buffer, int childIdx) {
          if(skipContent()) {
              return;
          }
          if(childIdx == 0) {
              buffer.append(" FROM CAST(");
          } else if(childIdx == 1) {
              buffer.append(" AS INTEGER) FOR CAST(");
          }
      }
  
      @Override
      public void appendChildrenEnd(QuotingAppendable buffer) {
          if(skipContent()) {
              return;
          }
          buffer.append(" AS INTEGER)");
          super.appendChildrenEnd(buffer);
      }
  
      @Override
      public Node copy() {
          return new FirebirdSubstringFunctionNode(getAlias());
      }
  }
  