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    1   /**
    2    * Copyright (c) 2008-2011, http://www.snakeyaml.org
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *     http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16
    17  package org.yaml.snakeyaml.constructor;
    18
    19  import org.yaml.snakeyaml.error.YAMLException;
    20  import org.yaml.snakeyaml.nodes.Node;
    21
    22  /**
    23   * Because recursive structures are not very common we provide a way to save
    24   * some typing when extending a constructor
    25   */
    26  public abstract class AbstractConstruct implements Construct {
    27
    28      /**
    29       * Fail with a reminder to provide the seconds step for a recursive
    30       * structure
    31       *
    32       * @see org.yaml.snakeyaml.constructor.Construct#construct2ndStep(org.yaml.snakeyaml.nodes.Node,
    33       *      java.lang.Object)
    34       */
    35      public void construct2ndStep(Node node, Object data) {
    36          if (node.isTwoStepsConstruction()) {
    37              throw new IllegalStateException("Not Implemented in " + getClass().getName());
    38          } else {
    39              throw new YAMLException("Unexpected recursive structure for Node: " + node);
    40          }
    41      }
    42  }