src/main/java/net/hydromatic/linq4j/expressions/AbstractNode.java

/*
// Licensed to Julian Hyde under one or more contributor license
// agreements. See the NOTICE file distributed with this work for
// additional information regarding copyright ownership.
//
// Julian Hyde 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 net.hydromatic.linq4j.expressions;

import java.lang.reflect.Type;

/**
 * Abstract implementation of {@link Node}.
 */
public abstract class AbstractNode implements Node {
  public final ExpressionType nodeType;
  public final Type type;

  AbstractNode(ExpressionType nodeType, Type type) {
    this.type = type;
    this.nodeType = nodeType;
  }

  /**
   * Gets the node type of this Expression.
   */
  public ExpressionType getNodeType() {
    return nodeType;
  }

  /**
   * Gets the static type of the expression that this Expression
   * represents.
   */
  public Type getType() {
    return type;
  }

  public void accept(ExpressionWriter writer) {
    accept(writer, 0, 0);
  }

  void accept0(ExpressionWriter writer) {
    accept(writer, 0, 0);
  }

  void accept(ExpressionWriter writer, int lprec, int rprec) {
    throw new RuntimeException(
        "un-parse not supported: " + getClass() + ":" + nodeType);
  }

  public Node accept(Visitor visitor) {
    throw new RuntimeException(
        "visit not supported: " + getClass() + ":" + nodeType);
  }

  public Object evaluate(Evaluator evaluator) {
    throw new RuntimeException(
        "evaluation not supported: " + getClass() + ":" + nodeType);
  }
}

// End AbstractNode.java