dart/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/RedirectingConstructorInvocation.java

/*
 * Copyright 2012, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
 * 
 * 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 com.google.dart.engine.ast;

import com.google.dart.engine.element.ConstructorElement;
import com.google.dart.engine.scanner.Token;

/**
 * Instances of the class {@code RedirectingConstructorInvocation} represent the invocation of a
 * another constructor in the same class from within a constructor's initialization list.
 * 
 * <pre>
 * redirectingConstructorInvocation ::=
 *     'this' ('.' identifier)? arguments
 * </pre>
 * 
 * @coverage dart.engine.ast
 */
public class RedirectingConstructorInvocation extends ConstructorInitializer {
  /**
   * The token for the 'this' keyword.
   */
  private Token keyword;

  /**
   * The token for the period before the name of the constructor that is being invoked, or
   * {@code null} if the unnamed constructor is being invoked.
   */
  private Token period;

  /**
   * The name of the constructor that is being invoked, or {@code null} if the unnamed constructor
   * is being invoked.
   */
  private SimpleIdentifier constructorName;

  /**
   * The list of arguments to the constructor.
   */
  private ArgumentList argumentList;

  /**
   * The element associated with the constructor based on static type information, or {@code null}
   * if the AST structure has not been resolved or if the constructor could not be resolved.
   */
  private ConstructorElement staticElement;

  /**
   * Initialize a newly created redirecting invocation to invoke the constructor with the given name
   * with the given arguments.
   * 
   * @param keyword the token for the 'this' keyword
   * @param period the token for the period before the name of the constructor that is being invoked
   * @param constructorName the name of the constructor that is being invoked
   * @param argumentList the list of arguments to the constructor
   */
  public RedirectingConstructorInvocation(Token keyword, Token period,
      SimpleIdentifier constructorName, ArgumentList argumentList) {
    this.keyword = keyword;
    this.period = period;
    this.constructorName = becomeParentOf(constructorName);
    this.argumentList = becomeParentOf(argumentList);
  }

  @Override
  public <R> R accept(AstVisitor<R> visitor) {
    return visitor.visitRedirectingConstructorInvocation(this);
  }

  /**
   * Return the list of arguments to the constructor.
   * 
   * @return the list of arguments to the constructor
   */
  public ArgumentList getArgumentList() {
    return argumentList;
  }

  @Override
  public Token getBeginToken() {
    return keyword;
  }

  /**
   * Return the name of the constructor that is being invoked, or {@code null} if the unnamed
   * constructor is being invoked.
   * 
   * @return the name of the constructor that is being invoked
   */
  public SimpleIdentifier getConstructorName() {
    return constructorName;
  }

  @Override
  public Token getEndToken() {
    return argumentList.getEndToken();
  }

  /**
   * Return the token for the 'this' keyword.
   * 
   * @return the token for the 'this' keyword
   */
  public Token getKeyword() {
    return keyword;
  }

  /**
   * Return the token for the period before the name of the constructor that is being invoked, or
   * {@code null} if the unnamed constructor is being invoked.
   * 
   * @return the token for the period before the name of the constructor that is being invoked
   */
  public Token getPeriod() {
    return period;
  }

  /**
   * Return the element associated with the constructor based on static type information, or
   * {@code null} if the AST structure has not been resolved or if the constructor could not be
   * resolved.
   * 
   * @return the element associated with the constructor
   */
  public ConstructorElement getStaticElement() {
    return staticElement;
  }

  /**
   * Set the list of arguments to the constructor to the given list.
   * 
   * @param argumentList the list of arguments to the constructor
   */
  public void setArgumentList(ArgumentList argumentList) {
    this.argumentList = becomeParentOf(argumentList);
  }

  /**
   * Set the name of the constructor that is being invoked to the given identifier.
   * 
   * @param identifier the name of the constructor that is being invoked
   */
  public void setConstructorName(SimpleIdentifier identifier) {
    constructorName = becomeParentOf(identifier);
  }

  /**
   * Set the token for the 'this' keyword to the given token.
   * 
   * @param keyword the token for the 'this' keyword
   */
  public void setKeyword(Token keyword) {
    this.keyword = keyword;
  }

  /**
   * Set the token for the period before the name of the constructor that is being invoked to the
   * given token.
   * 
   * @param period the token for the period before the name of the constructor that is being invoked
   */
  public void setPeriod(Token period) {
    this.period = period;
  }

  /**
   * Set the element associated with the constructor based on static type information to the given
   * element.
   * 
   * @param element the element to be associated with the constructor
   */
  public void setStaticElement(ConstructorElement element) {
    this.staticElement = element;
  }

  @Override
  public void visitChildren(AstVisitor<?> visitor) {
    safelyVisitChild(constructorName, visitor);
    safelyVisitChild(argumentList, visitor);
  }
}