content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2004 The Apache Software Foundation.
   *
   * Licensed 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.
   */
  /*
   * $Id: Pattern.java,v 1.2.4.1 2005/09/12 11:00:31 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler;
  
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  public abstract class Pattern extends Expression {
      /**
       * Returns the type of a pattern, which is always a <code>NodeType</code>.
       * A <code>NodeType</code> has a number of subtypes defined by
       * <code>NodeType._type</code> corresponding to each type of node.
       */
      public abstract Type typeCheck(SymbolTable stable) throws TypeCheckError;
  
      /**
       * Translate this node into JVM bytecodes. Patterns are translated as
       * boolean expressions with true/false lists. Before calling
       * <code>translate</code> on a pattern, make sure that the node being
       * matched is on top of the stack. After calling <code>translate</code>,
       * make sure to backpatch both true and false lists. True lists are the
       * default, in the sense that they always <em>"fall through"</em>. If this
       * is not the intended semantics (e.g., see
       * {@link AlternativePattern#translate})
       * then a GOTO must be appended to the instruction list after calling
       * <code>translate</code>.
       */
      public abstract void translate(ClassGenerator classGen,
                                     MethodGenerator methodGen);
  
      /**
       * Returns the priority of this pattern (section 5.5 in the XSLT spec).
       */
      public abstract double getPriority();
  }
  