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   *  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
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  package org.apache.cayenne.dbsync.merge.token.model;
  
  import org.apache.cayenne.dba.TypesMapping;
  import org.apache.cayenne.dbsync.merge.context.MergerContext;
  import org.apache.cayenne.dbsync.merge.factory.MergerTokenFactory;
  import org.apache.cayenne.dbsync.merge.token.MergerToken;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.map.DbEntity;
  
  /**
   * A {@link MergerToken} that modifies one original {@link DbAttribute} to match another
   * new {@link DbAttribute}s type, maxLength and precision. The name and mandatory fields
   * are not modified by this token.
   * 
   */
  public class SetColumnTypeToModel extends AbstractToModelToken.Entity {
  
      private DbAttribute columnOriginal;
      private DbAttribute columnNew;
  
      public SetColumnTypeToModel(DbEntity entity, DbAttribute columnOriginal, DbAttribute columnNew) {
          super("Set Column Type", 65, entity);
          this.columnOriginal = columnOriginal;
          this.columnNew = columnNew;
      }
  
      @Override
      public MergerToken createReverse(MergerTokenFactory factory) {
          return factory.createSetColumnTypeToDb(getEntity(), columnNew, columnOriginal);
      }
  
      @Override
      public void execute(MergerContext mergerContext) {
          columnOriginal.setType(columnNew.getType());
          columnOriginal.setMaxLength(columnNew.getMaxLength());
          columnOriginal.setAttributePrecision(columnNew.getAttributePrecision());
          columnOriginal.setScale(columnNew.getScale());
          mergerContext.getDelegate().dbAttributeModified(columnOriginal);
      }
  
      @Override
      public String getTokenValue() {
          StringBuilder sb = new StringBuilder();
          sb.append(getEntity().getName());
          sb.append(".");
          sb.append(columnNew.getName());
  
          if (columnOriginal.getType() != columnNew.getType()) {
              sb.append(" type: ");
              sb.append(TypesMapping.getSqlNameByType(columnOriginal.getType()));
              sb.append(" -> ");
              sb.append(TypesMapping.getSqlNameByType(columnNew.getType()));
          }
  
          if (columnOriginal.getMaxLength() != columnNew.getMaxLength()) {
              sb.append(" maxLength: ");
              sb.append(columnOriginal.getMaxLength());
              sb.append(" -> ");
              sb.append(columnNew.getMaxLength());
          }
  
          if (columnOriginal.getAttributePrecision() != columnNew.getAttributePrecision()) {
              sb.append(" precision: ");
              sb.append(columnOriginal.getAttributePrecision());
              sb.append(" -> ");
              sb.append(columnNew.getAttributePrecision());
          }
  
          if (columnOriginal.getScale() != columnNew.getScale()) {
              sb.append(" scale: ");
              sb.append(columnOriginal.getScale());
              sb.append(" -> ");
              sb.append(columnNew.getScale());
          }
  
          return sb.toString();
      }
      
  }
  