001: /*
002: * hgcommons 7
003: * Hammurapi Group Common Library
004: * Copyright (C) 2003 Hammurapi Group
005: *
006: * This program is free software; you can redistribute it and/or
007: * modify it under the terms of the GNU Lesser General Public
008: * License as published by the Free Software Foundation; either
009: * version 2 of the License, or (at your option) any later version.
010: *
011: * This program is distributed in the hope that it will be useful,
012: * but WITHOUT ANY WARRANTY; without even the implied warranty of
013: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014: * Lesser General Public License for more details.
015: *
016: * You should have received a copy of the GNU Lesser General Public
017: * License along with this library; if not, write to the Free Software
018: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
019: *
020: * URL: http://www.hammurapi.biz/hammurapi-biz/ef/xmenu/hammurapi-group/products/products/hgcommons/index.html
021: * e-Mail: support@hammurapi.biz
022: */
023: package biz.hammurapi.antlr;
024:
025: import org.w3c.dom.Document;
026: import org.w3c.dom.Element;
027:
028: import antlr.collections.AST;
029:
030: /**
031: * Serializes AST to DOM
032: * @author Pavel Vlasov
033: */
034: public class AstUtil {
035: /**
036: * Serializes AST, its children and its siblings to DOM.
037: * @param node
038: * @param tokenNames
039: * @param holder
040: */
041: public static void toDom(antlr.collections.AST node,
042: String[] tokenNames, Element holder) {
043: for (AST ast = node; ast != null; ast = ast.getNextSibling()) {
044: holder.appendChild(toDom(ast, tokenNames, holder
045: .getOwnerDocument()));
046: }
047: }
048:
049: /**
050: * Serializes AST and its children to DOM.
051: * @param node
052: * @param tokenNames
053: * @param owner
054: */
055: public static Element toDom(antlr.collections.AST node,
056: String[] tokenNames, Document owner) {
057: Element ret = owner.createElement("ast");
058: ret.setAttribute("type", tokenNames[node.getType()]);
059: if (node.getText() != null) {
060: ret.appendChild(owner.createTextNode(node.getText()));
061: }
062: for (AST child = node.getFirstChild(); child != null; child = child
063: .getNextSibling()) {
064: ret.appendChild(toDom(child, tokenNames, owner));
065: }
066: return ret;
067: }
068:
069: private static String tabs(int t) {
070: StringBuffer sb = new StringBuffer();
071: for (int i = 0; i < t; i++) {
072: sb.append("....");
073: }
074: return sb.toString();
075: }
076:
077: /**
078: * Dumps node and siblings
079: * @param node
080: * @param tokenNames
081: */
082: public static void dumpAll(antlr.collections.AST node,
083: String[] tokenNames) {
084: System.out.println("=== AST Dump ===");
085: while (node != null) {
086: dump(node, tokenNames, 0);
087: node = node.getNextSibling();
088: }
089: }
090:
091: /**
092: * Dumps this node and its children
093: * @param node
094: */
095: public static void dump(antlr.collections.AST node,
096: String[] tokenNames) {
097: dump(node, tokenNames, 0);
098: }
099:
100: private static void dump(antlr.collections.AST node,
101: String[] tokenNames, int tab) {
102: System.out.print(tabs(tab));
103: System.out.print(tokenNames[node.getType()]);
104: if (node.getText() != null) {
105: System.out.println(" '" + node.getText() + "'");
106: }
107: for (AST child = node.getFirstChild(); child != null; child = child
108: .getNextSibling()) {
109: dump(child, tokenNames, tab + 1);
110: }
111: }
112: }
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