Axis 2 example source code file (JavaUtils.java)

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Java - Axis 2 tags/keywords

arraylist, arraylist, debug_frame, javautils, javautils, malformedurlexception, net, network, nullpointerexception, runtimeexception, string, string, stringbuffer, stringtokenizer, stringtokenizer, url, util

The Axis 2 JavaUtils.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.
 */

package org.apache.axis2.jaxws.utility;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.StringTokenizer;

/** Common Java Utilites */
public class JavaUtils extends org.apache.axis2.util.JavaUtils {

    /** Private Constructor...All methods of this class are static */
    private JavaUtils() {
    }

    /**
     * Namespace 2 Package algorithm as defined by the JAXB Specification
     *
     * @param Namespace
     * @return String represeting Namespace
     */
    public static String getPackageFromNamespace(String namespace) {
        // The following steps correspond to steps described in the JAXB Specification

        // Step 1: Scan off the host name
        String hostname = null;
        String path = null;
        try {
            URL url = new URL(namespace);
            hostname = url.getHost();
            path = url.getPath();
        }
        catch (MalformedURLException e) {
            // No FFDC code needed
            if (namespace.indexOf(":") > -1) {
                // Brain-dead code to skip over the protocol
                hostname = namespace.substring(namespace.indexOf(":") + 1);
            } else {
                hostname = namespace;
            }
        }

        // Step 3: Tokenize the host name using ":" and "/"
        StringTokenizer st = new StringTokenizer(hostname, ":/");

        ArrayList<String> wordList = new ArrayList();

        //Read Hostname first.
        for (int i = 0; st != null && i < st.countTokens(); ++i) {
            wordList.add(st.nextToken());
        }
        //Read rest Of the path now
        if (path != null) {
            StringTokenizer pathst = new StringTokenizer(path, "/");
            while (pathst != null && pathst.hasMoreTokens()) {
                wordList.add(pathst.nextToken());
            }
        }
        String[] words = wordList.toArray(new String[0]);

        // Now do step 2: Strip off the trailing "." (i.e. strip off .html)
        if (words != null && words.length > 1) {
            String lastWord = words[words.length - 1];
            int index = lastWord.lastIndexOf('.');
            if (index > 0) {
                words[words.length - 1] = lastWord.substring(0, index);
            }
        }

        // Step 4: Unescape each escape sequence
        // TODO I don't know what to do here.

        // Step 5: If protocol is urn, replace - with . in the first word
        if (namespace.startsWith("urn:")) {
            words[0] = replace(words[0], "-", ".");
        }

        // Step 6: Tokenize the first word with "." and reverse the order. (the www is also removed).
        // TODO This is not exactly equivalent to the JAXB Rule.
        StringTokenizer st2 = new StringTokenizer(words[0], ".");
        ArrayList<String> list = new ArrayList();
        while (st2.hasMoreTokens()) {
            // Add the strings so they are in reverse order
            list.add(0, st2.nextToken());
        }
        // Remove www
        String last = list.get(list.size() - 1);
        if (last.equals("www")) {
            list.remove(list.size() - 1);
        }
        // Now each of words is represented by list
        for (int i = 1; i < words.length; i++) {
            list.add(words[i]);
        }

        // Step 7: lowercase each word
        for (int i = 0; i < list.size(); i++) {
            String word = list.remove(i);
            word = word.toLowerCase();
            list.add(i, word);
        }

        // Step 8: make into and an appropriate java word
        for (int i = 0; i < list.size(); i++) {
            String word = list.get(i);

            // 8a: Convert special characters to underscore
            // Convert non-java words to underscore.
            // TODO: Need to do this for all chars..not just hyphens
            word = replace(word, "-", "_");

            // 8b: Append _ to java keywords
            if (JavaUtils.isJavaKeyword(word)) {
                word = word + "_";
            }
            // 8c: prepend _ if first character cannot be the first character of a java identifier
            if (!Character.isJavaIdentifierPart(word.charAt(0))) {
                word = "_" + word;
            }

            list.set(i, word);
        }

        // Step 9: Concatenate and return
        String name = "";
        for (int i = 0; i < list.size(); i++) {
            if (i == 0) {
                name = list.get(0);
            } else {
                name = name + "." + list.get(i);
            }
        }
        return name;
    }

    /**
     * replace: Like String.replace except that the old new items are strings.
     *
     * @param name string
     * @param oldT old text to replace
     * @param newT new text to use
     * @return replacement string
     */
    public static final String replace(String name,
                                       String oldT, String newT) {

        if (name == null) return "";

        // Create a string buffer that is twice initial length.
        // This is a good starting point.
        StringBuffer sb = new StringBuffer(name.length() * 2);

        int len = oldT.length();
        try {
            int start = 0;
            int i = name.indexOf(oldT, start);

            while (i >= 0) {
                sb.append(name.substring(start, i));
                sb.append(newT);
                start = i + len;
                i = name.indexOf(oldT, start);
            }
            if (start < name.length())
                sb.append(name.substring(start));
        } catch (NullPointerException e) {
            // No FFDC code needed
        }

        return new String(sb);
    }

    /**
     * Get a string containing the stack of the current location
     *
     * @return String
     */
    public static String stackToString() {
        return stackToString(new RuntimeException());
    }

    /**
     * Get a string containing the stack of the specified exception
     *
     * @param e
     * @return
     */
    public static String stackToString(Throwable e) {
        java.io.StringWriter sw = new java.io.StringWriter();
        java.io.BufferedWriter bw = new java.io.BufferedWriter(sw);
        java.io.PrintWriter pw = new java.io.PrintWriter(bw);
        e.printStackTrace(pw);
        pw.close();
        String text = sw.getBuffer().toString();
        // Jump past the throwable
        text = text.substring(text.indexOf("at"));
        text = replace(text, "at ", "DEBUG_FRAME = ");
        return text;
    }
}