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Java Source Code / Java Documentation » Parser » Rats Parser Generators » xtc.xform   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    xtc.xform.Engine Engine public class Engine (Code) The query engine. This class' Engine.run method performs queries on abstract syntax trees. author:    Joe Pamer author:    Laune Harris version:    $Revision: 1.56 $ Inner Class :static class Sequence extends LinkedList Inner Class :static class Environment Inner Class :static class Variable Inner Class :class QueryVisitor extends Visitor Field Summary final  int FOCUS_ALL      Flag for all-nodes-relative expression evaluation. final  int FOCUS_IMPLICIT      Flag for expression evaluation with an implicit focus. final  int FOCUS_INSIDE_OUT      Flag for inside-out tree traversal. final  int FOCUS_LAST      Flag for continuing focus. final  int FOCUS_ROOT      Flag for root-relative expression evaluation.  boolean bad_breadth_flag      The flag to see if we have to generate another BFS traversal.  Sequence bfs_sequence      The BFS data.  Environment environment      The query's run-time environmnt.  int focus_flag      The focus flag.  HashMap<String, Function> function_table      The query's function library.  Item item_tree      The intermediate representation of the source tree.  String[] lib_funcs       boolean modified_flag      The tree modification flag.  GNode source_ast      The AST to be transformed or queried.  QueryVisitor visitor      The query AST's visitor. Constructor Summary public   Engine()      Create a new engine. Method Summary protected  void addFunction(Function function)      Add a function to the engine's function library. protected  Object callFunction(String name, ArrayList<Object> args)      Call the specified function in the engine's function library.  List<Object> castToListOfObject(T o)      MagiCast (TM).  List<Sequence<?>> castToListOfSequence(T o)      MagiCast (TM).  Sequence<Item> castToSequenceOfItem(T o)      MagiCast (TM).  Sequence<Object> castToSequenceOfObject(T o)      MagiCast (TM). public  GNode getASTRoot()      Get the root of the source AST. public  List<Object> run(Query query, GNode ast)      Perform a query on an AST. Parameters:   query - The query. Parameters:   ast - The AST to be queried. Field Detail FOCUS_ALL final int FOCUS_ALL(Code) Flag for all-nodes-relative expression evaluation. FOCUS_IMPLICIT final int FOCUS_IMPLICIT(Code) Flag for expression evaluation with an implicit focus. FOCUS_INSIDE_OUT final int FOCUS_INSIDE_OUT(Code) Flag for inside-out tree traversal. FOCUS_LAST final int FOCUS_LAST(Code) Flag for continuing focus. FOCUS_ROOT final int FOCUS_ROOT(Code) Flag for root-relative expression evaluation. bad_breadth_flag boolean bad_breadth_flag(Code) The flag to see if we have to generate another BFS traversal. bfs_sequence Sequence bfs_sequence(Code) The BFS data. environment Environment environment(Code) The query's run-time environmnt. focus_flag int focus_flag(Code) The focus flag. function_table HashMap<String, Function> function_table(Code) The query's function library. item_tree Item item_tree(Code) The intermediate representation of the source tree. lib_funcs String[] lib_funcs(Code) The built in library functions modified_flag boolean modified_flag(Code) The tree modification flag. source_ast GNode source_ast(Code) The AST to be transformed or queried. visitor QueryVisitor visitor(Code) The query AST's visitor. Constructor Detail Engine public Engine()(Code) Create a new engine. Method Detail addFunction protected void addFunction(Function function)(Code) Add a function to the engine's function library. Parameters:   function - The external function to add to function library callFunction protected Object callFunction(String name, ArrayList<Object> args) throws IllegalArgumentException(Code) Call the specified function in the engine's function library. Parameters:   name - The name of the function. Parameters:   args - The function's arguments. throws:   IllegalArgumentException - Signals that the specified functioncannot found in the function library. castToListOfObject List<Object> castToListOfObject(T o)(Code) MagiCast (TM). Cast to list of objects castToListOfSequence List<Sequence<?>> castToListOfSequence(T o)(Code) MagiCast (TM). Cast to list of sequence castToSequenceOfItem Sequence<Item> castToSequenceOfItem(T o)(Code) MagiCast (TM). Cast to sequence of item castToSequenceOfObject Sequence<Object> castToSequenceOfObject(T o)(Code) MagiCast (TM). Cast to sequence of object getASTRoot public GNode getASTRoot()(Code) Get the root of the source AST. The (possibly transformed) source AST. run public List<Object> run(Query query, GNode ast)(Code) Perform a query on an AST. Parameters:   query - The query. Parameters:   ast - The AST to be queried. The result of the query. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)