/*
    * 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 org.basepom.mojo.propertyhelper.beans;
  
  import static com.google.common.base.Preconditions.checkState;
  
  import com.google.common.annotations.VisibleForTesting;
  
  public class NumberDefinition
          extends AbstractDefinition<NumberDefinition> {
  
      public static final String INITIAL_VALUE = "0";
  
      /**
       * If a multi-number, which field to increment. Field injected by Maven.
       */
      int fieldNumber = 0;
  
      /**
       * Increment of the property when changing it. Field injected by Maven.
       */
      int increment = 1;
  
      public NumberDefinition() {
          super();
          setInitialValue(INITIAL_VALUE);
      }
  
      public int getFieldNumber() {
          return fieldNumber;
      }
  
      @VisibleForTesting
      public NumberDefinition setFieldNumber(final int fieldNumber) {
          this.fieldNumber = fieldNumber;
          return this;
      }
  
      public int getIncrement() {
          return increment;
      }
  
      @VisibleForTesting
      public NumberDefinition setIncrement(final int increment) {
          this.increment = increment;
          return this;
      }
  
      @Override
      public void check() {
          super.check();
          checkState(getInitialValue().isPresent(), "the initial value must not be empty");
          checkState(fieldNumber >= 0, "the field number must be >= 0");
      }
  }