JSwitch.java

/**
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 * Portions Copyright 2013-2017 Philip Helger + contributors
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package com.helger.jcodemodel;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.annotation.Nonnull;

/**
 * Switch statement
 */
public class JSwitch implements IJStatement
{
  /**
   * Test part of switch statement.
   */
  private final IJExpression m_aTestExpr;

  /**
   * vector of JCases.
   */
  private final List <JCase> m_aCases = new ArrayList <> ();

  /**
   * a single default case
   */
  private JCase m_aDefaultCase;

  /**
   * Construct a switch statement
   *
   * @param aTestExpr
   *        expression
   */
  protected JSwitch (@Nonnull final IJExpression aTestExpr)
  {
    m_aTestExpr = aTestExpr;
  }

  @Nonnull
  public IJExpression test ()
  {
    return m_aTestExpr;
  }

  @Nonnull
  public Iterator <JCase> cases ()
  {
    return m_aCases.iterator ();
  }

  @Nonnull
  public JCase _case (@Nonnull final IJExpression label)
  {
    final JCase c = new JCase (label);
    m_aCases.add (c);
    return c;
  }

  @Nonnull
  public JCase _default ()
  {
    if (m_aDefaultCase == null)
    {
      // default cases statements don't have a label
      m_aDefaultCase = new JCase (null, true);
    }
    return m_aDefaultCase;
  }

  public void state (@Nonnull final JFormatter f)
  {
    if (JOp.hasTopOp (m_aTestExpr))
    {
      f.print ("switch ").generable (m_aTestExpr).print (" {").newline ();
    }
    else
    {
      f.print ("switch (").generable (m_aTestExpr).print (')').print (" {").newline ();
    }
    for (final JCase c : m_aCases)
      f.statement (c);
    if (m_aDefaultCase != null)
      f.statement (m_aDefaultCase);
    f.print ('}').newline ();
  }
}