Java example source code file (Token.java)

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Java - Java tags/keywords

character, eof, eol, identifier, number, quoted, string, stringbuilder, token

The Token.java Java example source code

/*
 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.tools.jstat;

import java.io.StreamTokenizer;

/**
 * A class for encapsulating tokens returned from StreamTokenizer primarily
 * for output formatting purposes.
 *
 * @author Brian Doherty
 * @since 1.5
 */
public class Token {
    public String sval;
    public double nval;
    public int ttype;

    public Token(int ttype, String sval, double nval) {
        this.ttype = ttype;
        this.sval = sval;
        this.nval = nval;
    }

    public Token(int ttype, String sval) {
        this(ttype, sval, 0);
    }

    public Token(int ttype) {
        this(ttype, null, 0);
    }

    public String toMessage() {
        switch(ttype) {
        case StreamTokenizer.TT_EOL:
            return "\"EOL\"";
        case StreamTokenizer.TT_EOF:
            return "\"EOF\"";
        case StreamTokenizer.TT_NUMBER:
            return "NUMBER";
        case StreamTokenizer.TT_WORD:
            if (sval == null) {
                return "IDENTIFIER";
            } else {
                return "IDENTIFIER " + sval;
            }
        default:
            if (ttype == (int)'"') {
                String msg = "QUOTED STRING";
                if (sval != null)
                    msg = msg + " \"" + sval + "\"";
                return msg;
            } else {
                return "CHARACTER \'" + (char)ttype + "\'";
            }
        }
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();
        switch(ttype) {
        case StreamTokenizer.TT_EOL:
            sb.append("ttype=TT_EOL");
            break;
        case StreamTokenizer.TT_EOF:
            sb.append("ttype=TT_EOF");
            break;
        case StreamTokenizer.TT_NUMBER:
            sb.append("ttype=TT_NUM,").append("nval="+nval);
            break;
        case StreamTokenizer.TT_WORD:
            if (sval == null) {
                sb.append("ttype=TT_WORD:IDENTIFIER");
            } else {
                sb.append("ttype=TT_WORD:").append("sval="+sval);
            }
            break;
        default:
            if (ttype == (int)'"') {
                sb.append("ttype=TT_STRING:").append("sval="+sval);
            } else {
                sb.append("ttype=TT_CHAR:").append((char)ttype);
            }
            break;
        }
        return sb.toString();
    }
}