Package org.antlr.runtime.tree

Examples of org.antlr.runtime.tree.CommonTree

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      Tree partSpecTree = ast.getChild(childIndex);
      if (partSpecTree.getType() == HiveParser.TOK_PARTSPEC) {
        PartitionSpec partSpec = new PartitionSpec();

        for (int i = 0; i < partSpecTree.getChildCount(); ++i) {
          CommonTree partSpecSingleKey = (CommonTree) partSpecTree.getChild(i);
          assert (partSpecSingleKey.getType() == HiveParser.TOK_PARTVAL);
          String key = partSpecSingleKey.getChild(0).getText().toLowerCase();
          String operator = partSpecSingleKey.getChild(1).getText();
          String val = partSpecSingleKey.getChild(2).getText();
          partSpec.addPredicate(key, operator, val);
        }

        partSpecList.add(partSpec);
      }
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  protected HashMap<String, String> extractPartitionSpecs(Tree partspec)
      throws SemanticException {
    HashMap<String, String> partSpec = new LinkedHashMap<String, String>();
    for (int i = 0; i < partspec.getChildCount(); ++i) {
      CommonTree partspec_val = (CommonTree) partspec.getChild(i);
      String val = stripQuotes(partspec_val.getChild(1).getText());
      partSpec.put(partspec_val.getChild(0).getText().toLowerCase(), val);
    }
    return partSpec;
  }
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        // BUILD AST
        ANTLRv3Lexer lex = new ANTLRv3Lexer(input);
        tokens = new TokenRewriteStream(lex);
        ANTLRv3Parser g = new ANTLRv3Parser(tokens);
        ANTLRv3Parser.grammarDef_return r = g.grammarDef();
        CommonTree t = r.getTree();
        if (tree_option) System.out.println(t.toStringTree());
        rewrite(g.getTreeAdaptor(),t,g.getTokenNames());
    }
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        wiz.visit(t, ANTLRv3Parser.AT,  // ^('@' id ACTION) rule actions
            new TreeWizard.Visitor() {
      @Override
              public void visit(Object t) {
                  CommonTree a = (CommonTree)t;
                  CommonTree action = null;
                  if ( a.getChildCount()==2 ) action = (CommonTree)a.getChild(1);
                  else if ( a.getChildCount()==3 ) action = (CommonTree)a.getChild(2);
                  if ( action.getType()==ANTLRv3Parser.ACTION ) {
                      tokens.delete(a.getTokenStartIndex(),
                                    a.getTokenStopIndex());
                      killTrailingNewline(tokens, action.getTokenStopIndex());
                  }
              }
            });
        wiz.visit(t, ANTLRv3Parser.ARG, // wipe rule arguments
                  new TreeWizard.Visitor() {
      @Override
              public void visit(Object t) {
                  CommonTree a = (CommonTree)t;
                  a = (CommonTree)a.getChild(0);
                  tokens.delete(a.token.getTokenIndex());
                  killTrailingNewline(tokens, a.token.getTokenIndex());
              }
            });
        wiz.visit(t, ANTLRv3Parser.RET, // wipe rule return declarations
            new TreeWizard.Visitor() {
      @Override
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    CommonTree ret = (CommonTree)a.getChild(0);
                    tokens.delete(a.token.getTokenIndex(),
                                  ret.token.getTokenIndex());
                }
            });
        wiz.visit(t, ANTLRv3Parser.SEMPRED, // comment out semantic predicates
            new TreeWizard.Visitor() {
      @Override
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    tokens.replace(a.token.getTokenIndex(), "/*"+a.getText()+"*/");
                }
            });
        wiz.visit(t, ANTLRv3Parser.GATED_SEMPRED, // comment out semantic predicates
            new TreeWizard.Visitor() {
      @Override
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    String text = tokens.toString(a.getTokenStartIndex(),
                                                  a.getTokenStopIndex());
                    tokens.replace(a.getTokenStartIndex(),
                                   a.getTokenStopIndex(),
                                   "/*"+text+"*/");
                }
            });
        wiz.visit(t, ANTLRv3Parser.SCOPE, // comment scope specs
            new TreeWizard.Visitor() {
      @Override
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    tokens.delete(a.getTokenStartIndex(),
                                  a.getTokenStopIndex());
                    killTrailingNewline(tokens, a.getTokenStopIndex());
                }
            });       
        wiz.visit(t, ANTLRv3Parser.ARG_ACTION, // args r[x,y] -> ^(r [x,y])
            new TreeWizard.Visitor() {
      @Override
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    if ( a.getParent().getType()==ANTLRv3Parser.RULE_REF ) {
                        tokens.delete(a.getTokenStartIndex(),
                                      a.getTokenStopIndex());
                    }
                }
            });
        wiz.visit(t, ANTLRv3Parser.LABEL_ASSIGN, // ^('=' id ^(RULE_REF [arg])), ...
            new TreeWizard.Visitor() {
      @Override
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    if ( !a.hasAncestor(ANTLRv3Parser.OPTIONS) ) { // avoid options
                        CommonTree child = (CommonTree)a.getChild(0);
                        tokens.delete(a.token.getTokenIndex());     // kill "id="
                        tokens.delete(child.token.getTokenIndex());
                    }
                }
            });
        wiz.visit(t, ANTLRv3Parser.LIST_LABEL_ASSIGN, // ^('+=' id ^(RULE_REF [arg])), ...
            new TreeWizard.Visitor() {
      @Override
              public void visit(Object t) {
                  CommonTree a = (CommonTree)t;
                  CommonTree child = (CommonTree)a.getChild(0);
                  tokens.delete(a.token.getTokenIndex());     // kill "id+="
                  tokens.delete(child.token.getTokenIndex());
              }
            });


        // AST STUFF
        wiz.visit(t, ANTLRv3Parser.REWRITE,
            new TreeWizard.Visitor() {
      @Override
              public void visit(Object t) {
                  CommonTree a = (CommonTree)t;
                  CommonTree child = (CommonTree)a.getChild(0);
                  int stop = child.getTokenStopIndex();
                  if ( child.getType()==ANTLRv3Parser.SEMPRED ) {
                      CommonTree rew = (CommonTree)a.getChild(1);
                      stop = rew.getTokenStopIndex();
                  }
                  tokens.delete(a.token.getTokenIndex(), stop);
                  killTrailingNewline(tokens, stop);
              }
            });
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               }
           });
    }

    public static void ACTION(TokenRewriteStream tokens, CommonTree t) {
        CommonTree parent = (CommonTree)t.getParent();
        int ptype = parent.getType();
        if ( ptype==ANTLRv3Parser.SCOPE || // we have special rules for these
             ptype==ANTLRv3Parser.AT )
        {
            return;
        }
        //System.out.println("ACTION: "+t.getText());
        CommonTree root = (CommonTree)t.getAncestor(ANTLRv3Parser.RULE);
        if ( root!=null ) {
            CommonTree rule = (CommonTree)root.getChild(0);
            //System.out.println("rule: "+rule);
            if ( !Character.isUpperCase(rule.getText().charAt(0)) ) {
                tokens.delete(t.getTokenStartIndex(),t.getTokenStopIndex());
                killTrailingNewline(tokens, t.token.getTokenIndex());
            }
        }
    }
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    @Test public void testSeek() throws Exception {
        // ^(101 ^(102 103 ^(106 107) ) 104 105)
        // stream has 7 real + 6 nav nodes
        // Sequence of types: 101 DN 102 DN 103 106 DN 107 UP UP 104 105 UP EOF
        Tree r0 = new CommonTree(new CommonToken(101));
        Tree r1 = new CommonTree(new CommonToken(102));
        r0.addChild(r1);
        r1.addChild(new CommonTree(new CommonToken(103)));
        Tree r2 = new CommonTree(new CommonToken(106));
        r2.addChild(new CommonTree(new CommonToken(107)));
        r1.addChild(r2);
        r0.addChild(new CommonTree(new CommonToken(104)));
        r0.addChild(new CommonTree(new CommonToken(105)));

        TreeNodeStream stream = newStream(r0);
        stream.consume(); // consume 101
        stream.consume(); // consume DN
        stream.consume(); // consume 102
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    new String[] {"", "", "", "", "", "A", "B", "C", "D", "E", "ID", "VAR"};
  protected static final TreeAdaptor adaptor = new CommonTreeAdaptor();

  @Test public void testSingleNode() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("ID");
    String found = t.toStringTree();
    String expecting = "ID";
    assertEquals(expecting, found);
  }
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    assertEquals(expecting, found);
  }

  @Test public void testSingleNodeWithArg() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("ID[foo]");
    String found = t.toStringTree();
    String expecting = "foo";
    assertEquals(expecting, found);
  }
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    assertEquals(expecting, found);
  }

  @Test public void testSingleNodeTree() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A)");
    String found = t.toStringTree();
    String expecting = "A";
    assertEquals(expecting, found);
  }
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    assertEquals(expecting, found);
  }

  @Test public void testSingleLevelTree() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C D)");
    String found = t.toStringTree();
    String expecting = "(A B C D)";
    assertEquals(expecting, found);
  }
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