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Java example source code file (Util.java)

This example Java source code file (Util.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

string, stringbuffer, stringtokenizer, trace1, trace2, trace3, type, util

The Util.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: Util.java,v 1.2.4.1 2005/09/12 11:47:15 pvedula Exp $
 */

package com.sun.org.apache.xalan.internal.xsltc.compiler.util;

import java.util.StringTokenizer;

import com.sun.org.apache.bcel.internal.generic.Type;
import com.sun.org.apache.xalan.internal.utils.SecuritySupport;
import com.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
import com.sun.org.apache.xml.internal.utils.XML11Char;

/**
 * @author Jacek Ambroziak
 * @author Santiago Pericas-Geertsen
 */
public final class Util {
    private static char filesep;

    static {
        String temp = SecuritySupport.getSystemProperty("file.separator", "/");
        filesep = temp.charAt(0);
    }

    public static String noExtName(String name) {
        final int index = name.lastIndexOf('.');
        return name.substring(0, index >= 0 ? index : name.length());
    }

    /**
     * Search for both slashes in order to support URLs and
     * files.
     */
    public static String baseName(String name) {
        int index = name.lastIndexOf('\\');
        if (index < 0) {
            index = name.lastIndexOf('/');
        }

        if (index >= 0)
            return name.substring(index + 1);
        else {
            int lastColonIndex = name.lastIndexOf(':');
            if (lastColonIndex > 0)
                return name.substring(lastColonIndex + 1);
            else
                return name;
        }
    }

    /**
     * Search for both slashes in order to support URLs and
     * files.
     */
    public static String pathName(String name) {
        int index = name.lastIndexOf('/');
        if (index < 0) {
            index = name.lastIndexOf('\\');
        }
        return name.substring(0, index + 1);
    }

    /**
     * Replace all illegal Java chars by '_'.
     */
    public static String toJavaName(String name) {
        if (name.length() > 0) {
            final StringBuffer result = new StringBuffer();

            char ch = name.charAt(0);
            result.append(Character.isJavaIdentifierStart(ch) ? ch : '_');

            final int n = name.length();
            for (int i = 1; i < n; i++) {
                ch = name.charAt(i);
                result.append(Character.isJavaIdentifierPart(ch)  ? ch : '_');
            }
            return result.toString();
        }
        return name;
    }

    public static Type getJCRefType(String signature) {
        return Type.getType(signature);
    }

    public static String internalName(String cname) {
        return cname.replace('.', filesep);
    }

    public static void println(String s) {
        System.out.println(s);
    }

    public static void println(char ch) {
        System.out.println(ch);
    }

    public static void TRACE1() {
        System.out.println("TRACE1");
    }

    public static void TRACE2() {
        System.out.println("TRACE2");
    }

    public static void TRACE3() {
        System.out.println("TRACE3");
    }

    /**
     * Replace a certain character in a string with a new substring.
     */
    public static String replace(String base, char ch, String str) {
        return (base.indexOf(ch) < 0) ? base :
            replace(base, String.valueOf(ch), new String[] { str });
    }

    public static String replace(String base, String delim, String[] str) {
        final int len = base.length();
        final StringBuffer result = new StringBuffer();

        for (int i = 0; i < len; i++) {
            final char ch = base.charAt(i);
            final int k = delim.indexOf(ch);

            if (k >= 0) {
                result.append(str[k]);
            }
            else {
                result.append(ch);
            }
        }
        return result.toString();
    }

    /**
     * Replace occurances of '.', '-', '/' and ':'
     */
    public static String escape(String input) {
        return replace(input, ".-/:",
            new String[] { "$dot$", "$dash$", "$slash$", "$colon$" });
    }

    public static String getLocalName(String qname) {
        final int index = qname.lastIndexOf(":");
        return (index > 0) ? qname.substring(index + 1) : qname;
    }

    public static String getPrefix(String qname) {
        final int index = qname.lastIndexOf(":");
        return (index > 0) ? qname.substring(0, index) :
            Constants.EMPTYSTRING;
    }

    /**
     * Checks if the string is a literal (i.e. not an AVT) or not.
     */
    public static boolean isLiteral(String str) {
        final int length = str.length();
        for (int i = 0; i < length - 1; i++) {
            if (str.charAt(i) == '{' && str.charAt(i + 1) != '{') {
                return false;
            }
        }
        return true;
    }

    /**
     * Checks if the string is valid list of qnames
     */
    public static boolean isValidQNames(String str) {
        if ((str != null) && (!str.equals(Constants.EMPTYSTRING))) {
            final StringTokenizer tokens = new StringTokenizer(str);
            while (tokens.hasMoreTokens()) {
                if (!XML11Char.isXML11ValidQName(tokens.nextToken())) {
                    return false;
                }
            }
        }
        return true;
    }

}

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