Examples of TreeWizard

org.antlr.runtime.tree.TreeWizard
Build and navigate trees with this object. Must know about the names of tokens so you have to pass in a map or array of token names (from which this class can build the map). I.e., Token DECL means nothing unless the class can translate it to a token type. In order to create nodes and navigate, this class needs a TreeAdaptor. This class can build a token type -> node index for repeated use or for iterating over the various nodes with a particular type. This class works in conjunction with the TreeAdaptor rather than moving all this functionality into the adaptor. An adaptor helps build and navigate trees using methods. This class helps you do it with string patterns like "(A B C)". You can create a tree from that pattern or match subtrees against it.

Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[C]";
    assertEquals(expecting, found);
  }


  @Test public void testRepeatsVisit() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B (A C B) B D D)");
    final List<Object> elements = new ArrayList<Object>();
    wiz.visit(t, wiz.getTokenType("B"),
             new TreeWizard.Visitor() {
              @Override
              public void visit(Object t) {
                elements.add(t);
              }

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Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[B, B, B]";
    assertEquals(expecting, found);
  }


  @Test public void testRepeatsVisit2() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B (A C B) B D D)");
    final List<Object> elements = new ArrayList<Object>();
    wiz.visit(t, wiz.getTokenType("A"),
             new TreeWizard.Visitor() {
              @Override
              public void visit(Object t) {
                elements.add(t);
              }

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Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[A, A]";
    assertEquals(expecting, found);
  }


  @Test public void testRepeatsVisitWithContext() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B (A C B) B D D)");
    final List<String> elements = new ArrayList<String>();
    wiz.visit(t, wiz.getTokenType("B"),
       new TreeWizard.ContextVisitor() {
         @Override
         public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {
           elements.add(adaptor.getText(t)+"@"+
                (parent!=null?adaptor.getText(parent):"nil")+

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Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[B@A[0], B@A[1], B@A[2]]";
    assertEquals(expecting, found);
  }


  @Test public void testRepeatsVisitWithNullParentAndContext() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B (A C B) B D D)");
    final List<String> elements = new ArrayList<String>();
    wiz.visit(t, wiz.getTokenType("A"),
       new TreeWizard.ContextVisitor() {
         @Override
         public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {
           elements.add(adaptor.getText(t)+"@"+
                (parent!=null?adaptor.getText(parent):"nil")+

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Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[A@nil[0], A@A[1]]";
    assertEquals(expecting, found);
  }


  @Test public void testVisitPattern() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A B) D)");
    final List<Object> elements = new ArrayList<Object>();
    wiz.visit(t, "(A B)",
             new TreeWizard.Visitor() {
              @Override
              public void visit(Object t) {
                elements.add(t);
              }

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Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[A]"; // shouldn't match overall root, just (A B)
    assertEquals(expecting, found);
  }


  @Test public void testVisitPatternMultiple() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A B) (D (A B)))");
    final List<String> elements = new ArrayList<String>();
    wiz.visit(t, "(A B)",
             new TreeWizard.ContextVisitor() {
               @Override
               public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {
                 elements.add(adaptor.getText(t)+"@"+
                      (parent!=null?adaptor.getText(parent):"nil")+

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Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[A@A[2], A@D[0]]"; // shouldn't match overall root, just (A B)
    assertEquals(expecting, found);
  }


  @Test public void testVisitPatternMultipleWithLabels() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A[foo] B[bar]) (D (A[big] B[dog])))");
    final List<String> elements = new ArrayList<String>();
    wiz.visit(t, "(%a:A %b:B)",
             new TreeWizard.ContextVisitor() {
               @Override
               public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {
                 elements.add(adaptor.getText(t)+"@"+
                      (parent!=null?adaptor.getText(parent):"nil")+

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Examples of org.antlr.runtime.tree.TreeWizard

    String expecting = "[foo@A[2]foo&bar, big@D[0]big&dog]";
    assertEquals(expecting, found);
  }


  @Test public void testParse() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C)");
    boolean valid = wiz.parse(t, "(A B C)");
    assertTrue(valid);
  }

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Examples of org.antlr.runtime.tree.TreeWizard

    boolean valid = wiz.parse(t, "(A B C)");
    assertTrue(valid);
  }


  @Test public void testParseSingleNode() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("A");
    boolean valid = wiz.parse(t, "A");
    assertTrue(valid);
  }

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Examples of org.antlr.runtime.tree.TreeWizard

    boolean valid = wiz.parse(t, "A");
    assertTrue(valid);
  }


  @Test public void testParseFlatTree() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(nil A B C)");
    boolean valid = wiz.parse(t, "(nil A B C)");
    assertTrue(valid);
  }

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