content: /**
   * Copyright (c) 2013, Andre Steingress
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
   * following conditions are met:
   *
   * 1.) Redistributions of source code must retain the above copyright notice, this list of conditions and the following
   * disclaimer.
   * 2.) Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
   * disclaimer in the documentation and/or other materials provided with the distribution.
   * 3.) Neither the name of Andre Steingress nor the names of its contributors may be used to endorse or
   * promote products derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
   * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package org.gcontracts.domain;
  
  import org.codehaus.groovy.ast.expr.BinaryExpression;
  import org.codehaus.groovy.ast.expr.BooleanExpression;
  import org.codehaus.groovy.ast.expr.ConstantExpression;
  import org.codehaus.groovy.ast.stmt.BlockStatement;
  import org.codehaus.groovy.syntax.Token;
  import org.codehaus.groovy.syntax.Types;
  import org.gcontracts.util.Validate;
  
  /**
   * <p>Base class for all assertion types.</p>
   *
   * @author ast
   *
   * @param <T>
   */
  public abstract class Assertion<T extends Assertion> {
  
      private BlockStatement originalBlockStatement;
      private BooleanExpression booleanExpression;
  
      public Assertion()  {
          this.booleanExpression = new BooleanExpression(ConstantExpression.TRUE);
      }
  
      public Assertion(final BlockStatement blockStatement, final BooleanExpression booleanExpression)  {
          Validate.notNull(booleanExpression);
  
          this.originalBlockStatement = blockStatement; // the BlockStatement might be null! we do not always have the original expression available
          this.booleanExpression = booleanExpression;
      }
  
      public BooleanExpression booleanExpression() { return booleanExpression; }
      public BlockStatement originalBlockStatement() { return originalBlockStatement; }
  
      public void renew(BooleanExpression booleanExpression)  {
          Validate.notNull(booleanExpression);
  
          // don't renew the source position to keep the new assertion expression without source code replacement
          // booleanExpression.setSourcePosition(this.booleanExpression);
  
          this.booleanExpression = booleanExpression;
      }
  
      public void and(T other) {
          Validate.notNull(other);
  
          BooleanExpression newBooleanExpression =
                  new BooleanExpression(
                          new BinaryExpression(
                                  booleanExpression(),
                                  Token.newSymbol(Types.LOGICAL_AND, -1, -1),
                                  other.booleanExpression()
                          )
                  );
          newBooleanExpression.setSourcePosition(booleanExpression());
  
          renew(newBooleanExpression);
      }
  
      public void or(T other) {
          Validate.notNull(other);
  
          BooleanExpression newBooleanExpression =
                  new BooleanExpression(
                          new BinaryExpression(
                                  booleanExpression(),
                                  Token.newSymbol(Types.LOGICAL_OR, -1, -1),
                                  other.booleanExpression()
                          )
                  );
          newBooleanExpression.setSourcePosition(booleanExpression());
  
          renew(newBooleanExpression);
      }
  }
  