Java tutorial
/* * This source file is part of OSTIS (Open Semantic Technology for Intelligent * Systems) For the latest info, see http://www.ostis.net * * Copyright (c) 2010 OSTIS * * OSTIS is free software: you can redistribute it and/or modify it under the * terms of the GNU Lesser General Public License as published by the Free * Software Foundation, either version 3 of the License, or (at your option) any * later version. * * OSTIS 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 Lesser General Public License for more * details. * * You should have received a copy of the GNU Lesser General Public License * along with OSTIS. If not, see <http://www.gnu.org/licenses/>. */ package net.ostis.scpdev.builder.scg; import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.UnsupportedEncodingException; import org.apache.commons.lang3.StringUtils; import org.apache.commons.lang3.Validate; /** * @author Dmitry Lazurkin */ public class SCsWriter extends OutputStreamWriter { public static final int SC_CONST = 1; public static final int SC_VAR = 2; public static final int SC_METAVAR = 3; public static final int SC_SET = 10; public static final String POS_ARC_BEG = "-"; public static final String FUZ_ARC_BEG = "~"; public static final String NEG_ARC_BEG = "/"; public static final String CONST_ARC_END = ">"; public static final String VAR_ARC_END = ">>"; public static final String METAVAR_ARC_END = ">>>"; public static final String ARC_CONST_POS = POS_ARC_BEG + CONST_ARC_END; public static final String ARC_CONST_FUZ = FUZ_ARC_BEG + CONST_ARC_END; public static final String ARC_CONST_NEG = NEG_ARC_BEG + CONST_ARC_END; public static final String ARC_VAR_POS = POS_ARC_BEG + VAR_ARC_END; public static final String ARC_VAR_FUZ = FUZ_ARC_BEG + VAR_ARC_END; public static final String ARC_VAR_NEG = NEG_ARC_BEG + VAR_ARC_END; public static final String ARC_METAVAR_POS = POS_ARC_BEG + METAVAR_ARC_END; public static final String ARC_METAVAR_FUZ = FUZ_ARC_BEG + METAVAR_ARC_END; public static final String ARC_METAVAR_NEG = NEG_ARC_BEG + METAVAR_ARC_END; public static final String CONST_SET_BEG = "{"; public static final String CONST_SET_END = "}"; public static final String VAR_SET_BEG = "{."; public static final String VAR_SET_END = ".}"; public static final String METAVAR_SET_BEG = "{.."; public static final String METAVAR_SET_END = "..}"; public static final String CONST_SYS_BEG = "["; public static final String CONST_SYS_END = "]"; public static final String VAR_SYS_BEG = "[."; public static final String VAR_SYS_END = ".]"; public static final String METAVAR_SYS_BEG = "[.."; public static final String METAVAR_SYS_END = "..]"; public static final String CONST_ATTR = ":"; public static final String VAR_ATTR = "::"; public static final String METAVAR_ATTR = ":::"; public static final String SYNONYM = "="; public static final String CONT_STR = "=c="; public static final String CONT_NUM = "=n="; public static final String SEPARATOR = ";"; private static final String TMP_CONST_ID_FORMAT = "$%d"; private static final String TMP_VAR_ID_FORMAT = "$_%d"; private static final String TMP_METAVAR_ID_FORMAT = "$__%d"; private int counterId = 0; private int tab = 0; public SCsWriter(OutputStream out) throws UnsupportedEncodingException { super(out, "cp1251"); } public void incTab() { tab++; } public void decTab() { tab--; Validate.isTrue(tab >= 0); } private void writeTabs() throws IOException { for (int i = tab; i != 0; i--) super.write("\t"); } public String genId(int type) { int tmp = counterId; counterId++; String id = null; switch (type) { case SC_CONST: id = String.format(TMP_CONST_ID_FORMAT, tmp); break; case SC_VAR: id = String.format(TMP_VAR_ID_FORMAT, tmp); break; case SC_METAVAR: id = String.format(TMP_METAVAR_ID_FORMAT, tmp); break; default: break; } return id; } public void comment(String comment) throws IOException { writeTabs(); write("// "); write(comment); write("\n"); } public String node(String idtf, int type) throws IOException { writeTabs(); if (StringUtils.isNotEmpty(idtf)) { write(String.format("\"%s\" = ", idtf)); } String id = genId(type); String beg = null; String end = null; if (type == SC_CONST) { beg = CONST_SET_BEG; end = CONST_SET_END; } else if (type == SC_VAR) { beg = VAR_SET_BEG; end = VAR_SET_END; } else if (type == SC_METAVAR) { beg = METAVAR_SET_BEG; end = METAVAR_SET_END; } write(String.format("%s = %s %s;\n", id, beg, end)); return id; } public String arc(String from, String idtf, String type, String to, boolean reference) throws IOException { writeTabs(); if (StringUtils.isNotEmpty(idtf)) { write(String.format("\"%s\" = ", idtf)); } if (reference) { if (type.endsWith(METAVAR_ARC_END)) { idtf = genId(SC_METAVAR); } else if (type.endsWith(VAR_ARC_END)) { idtf = genId(SC_VAR); } else if (type.endsWith(CONST_ARC_END)) { idtf = genId(SC_CONST); } write(String.format("%s = ( ", idtf)); } write(String.format("%s %s %s", from, type, to)); if (reference) { write(" )"); } write(";\n"); return idtf; } public void arc(String from, String idtf, String type, String to) throws IOException { arc(from, idtf, type, to, false); } }