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Apache CXF example source code file (CommandLineParser.java)

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

Java - Apache CXF tags/keywords

badusageexception, badusageexception, bytearrayoutputstream, bytearrayoutputstream, dom, element, errorvisitor, form, io, list, log, logging, parser, string, string, stringbuilder, stringtokenizer, transformerexception, transformerexception, util

The Apache CXF CommandLineParser.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.cxf.tools.common.toolspec.parser;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.helpers.DOMUtils;
import org.apache.cxf.tools.common.toolspec.Tool;
import org.apache.cxf.tools.common.toolspec.ToolSpec;

public class CommandLineParser {

    private static final Logger LOG = LogUtils.getL7dLogger(CommandLineParser.class);
    private ToolSpec toolspec;

    public CommandLineParser(ToolSpec ts) {
        this.toolspec = ts;
    }

    public void setToolSpec(ToolSpec ts) {
        this.toolspec = ts;
    }

    public static String[] getArgsFromString(String s) {
        StringTokenizer toker = new StringTokenizer(s);
        List<Object> res = new ArrayList();

        while (toker.hasMoreTokens()) {
            res.add(toker.nextToken());
        }
        return res.toArray(new String[res.size()]);
    }

    public CommandDocument parseArguments(String args) throws BadUsageException {
        return parseArguments(getArgsFromString(args));
    }

    public CommandDocument parseArguments(String[] args) throws BadUsageException {

        if (LOG.isLoggable(Level.FINE)) {
            StringBuilder debugMsg = new StringBuilder("Parsing arguments: ");

            for (int i = 0; i < args.length; i++) {
                debugMsg.append(args[i]).append(" ");
            }
            LOG.fine(debugMsg.toString());
        }

        if (toolspec == null) {
            throw new IllegalStateException("No schema known- call to acceptSc"
                                            + "hema() must be made and must succeed");
        }

        // Create a result document

        Document resultDoc = null;

        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            factory.setNamespaceAware(true);
            resultDoc = factory.newDocumentBuilder().newDocument();
        } catch (Exception ex) {
            LOG.log(Level.SEVERE, "FAIL_CREATE_DOM_MSG");
        }
        Element commandEl = resultDoc.createElementNS("http://cxf.apache.org/Xutil/Command", "command");
        
        Attr attr = 
            commandEl.getOwnerDocument().createAttributeNS("http://www.w3.org/2001/XMLSchema-instance", 
                                                                   "xsi:schemaLocation");
        attr.setValue("http://cxf.apache.org/Xutil/Command http://cxf.apache.org/schema/xutil/commnad.xsd");
        commandEl.setAttributeNodeNS(attr);     
        commandEl.setAttribute("xmlns", "http://cxf.apache.org/Xutil/Command");
        commandEl.setAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
        resultDoc.appendChild(commandEl);

        TokenInputStream tokens = new TokenInputStream(args);

        // for all form elements...
        Element usage = toolspec.getUsage();

        List<Element> usageForms = toolspec.getUsageForms();
        if (LOG.isLoggable(Level.FINE)) {
            LOG.fine("Found " + usageForms.size()
                      + " alternative forms of usage, will use default form");
        }
        if (usageForms.size() > 0) {
            ErrorVisitor errors = new ErrorVisitor();
            
            for (Element elem : usageForms) {
                Form form = new Form(elem);

                int pos = tokens.getPosition();

                if (form.accept(tokens, commandEl, errors)) {
                    commandEl.setAttribute("form", form.getName());
                    break;
                } else {
                    // if no more left then return null;
                    tokens.setPosition(pos);
                    
                    if (elem.getNextSibling() == null) {
                        if (LOG.isLoggable(Level.INFO)) {
                            LOG.info("No more forms left to try, returning null");
                        }
                        throwUsage(errors);
                    }
                }
            
                
            }
/*
            for (int i = 0; i < usageForms.getLength(); i++) {
                Form form = new Form((Element)usageForms.item(i));

                int pos = tokens.getPosition();

                if (form.accept(tokens, commandEl, errors)) {
                    commandEl.setAttribute("form", form.getName());
                    break;
                } else {
                    // if no more left then return null;
                    tokens.setPosition(pos);
                    if (i == usageForms.getLength() - 1) {
                        if (LOG.isLoggable(Level.INFO)) {
                            LOG.info("No more forms left to try, returning null");
                        }
                        throwUsage(errors);
                    }
                }
            }
*/
        } else {
            ErrorVisitor errors = new ErrorVisitor();
            Form form = new Form(usage);

            if (!form.accept(tokens, commandEl, errors)) {
                throwUsage(errors);
            }
        }

        // output the result document
        if (LOG.isLoggable(Level.FINE)) {
            try {
                Transformer serializer = TransformerFactory.newInstance()
                    .newTransformer(
                                    new StreamSource(Tool.class
                                        .getResourceAsStream("indent-no-xml-declaration.xsl")));

                OutputStream os = new ByteArrayOutputStream();
                serializer.transform(new DOMSource(resultDoc), new StreamResult(os));
                LOG.fine(os.toString());
            } catch (Exception ex) {
                LOG.log(Level.SEVERE, "ERROR_SERIALIZE_COMMAND_MSG", ex);
            }
        }

        return new CommandDocument(toolspec, resultDoc);
    }

    public void throwUsage(ErrorVisitor errors) throws BadUsageException {
        try {
            throw new BadUsageException(getUsage(), errors);
        } catch (TransformerException ex) {
            LOG.log(Level.SEVERE, "CANNOT_GET_USAGE_MSG", ex);
            throw new BadUsageException(errors);
        }
    }

    public String getUsage() throws TransformerException {
        // REVISIT: style usage document into a form more readily output as a
        // usage message
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        InputStream in = getClass().getResourceAsStream("usage.xsl");

        toolspec.transform(in, baos);
        return baos.toString();
    }

    public String getDetailedUsage() throws TransformerException {
        // REVISIT: style usage document into a form more readily output as a
        // usage message
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        toolspec.transform(getClass().getResourceAsStream("detailedUsage.xsl"), baos);
        return baos.toString();
    }

    public String getFormattedDetailedUsage() throws TransformerException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        toolspec.transform(getClass().getResourceAsStream("detailedUsage.xsl"), baos);
        String usage = baos.toString();
        // we use the following pattern to format usage
        // |-------|-options|------|description-----------------|
        // before option white space size is 7
        int beforeOptSpan = 3;
        // option length is 8
        int optSize = 12;
        // after option white space size is 6
        int afterOptLen = 6;
        int totalLen = 80;
        int optSpan = optSize + afterOptLen - 1;
        int beforeDesSpan = beforeOptSpan + optSpan + 1;
        String lineSeparator = System.getProperty("line.separator");
        StringTokenizer st1 = new StringTokenizer(usage, lineSeparator);
        int i = 0;
        int length = st1.countTokens();
        String[] originalStrs = new String[length];
        while (st1.hasMoreTokens()) {
            String str = st1.nextToken();
            originalStrs[i] = str;
            i++;
        }
        StringBuilder strbuffer = new StringBuilder();
        for (int j = 0; j < length - 1; j = j + 2) {
            int optionLen = originalStrs[j].length();
            addWhiteNamespace(strbuffer, beforeOptSpan);
            if (optionLen <= optSpan) {
                // && beforeOptSpan + optionLen + optSpan + desLen <= totalLen -
                // 1) {

                strbuffer.append(originalStrs[j]);
                addWhiteNamespace(strbuffer, optSpan - originalStrs[j].length());
                strbuffer.append(" ");
                if (originalStrs[j + 1].length() > totalLen - beforeDesSpan) {
                    int lastIdx = totalLen - beforeDesSpan; 
                    int lastIdx2 = splitAndAppendText(strbuffer, originalStrs[j + 1], 0, lastIdx);
                    originalStrs[j + 1] = originalStrs[j + 1].substring(lastIdx2);
                    strbuffer.append(lineSeparator);
                } else {
                    strbuffer.append(originalStrs[j + 1]);
                    strbuffer.append(lineSeparator);
                    originalStrs[j + 1] = "";
                }
            } else {
                strbuffer.append(originalStrs[j]);
                strbuffer.append(lineSeparator);
            }
            String tmpStr = originalStrs[j + 1];
            
            for (i = 0; i < tmpStr.length(); i = i + (totalLen - beforeDesSpan)) {
                if (i + totalLen - beforeDesSpan < tmpStr.length()) {
                    addWhiteNamespace(strbuffer, beforeDesSpan);
                    int lastIdx = i + totalLen - beforeDesSpan; 
                    int lastIdx2 = splitAndAppendText(strbuffer, tmpStr, i, lastIdx);
                    i += lastIdx2 - lastIdx; 
                    strbuffer.append(lineSeparator);
                } else {
                    addWhiteNamespace(strbuffer, beforeDesSpan);
                    strbuffer.append(tmpStr.substring(i));
                    strbuffer.append(lineSeparator);
                }
            }
            strbuffer.append(lineSeparator);

        }

        return strbuffer.toString();
    }
    private int splitAndAppendText(StringBuilder buffer, String tmpStr, int idx, int lastIdx) {
        int origLast = lastIdx;
        while (lastIdx > idx && !Character.isWhitespace(tmpStr.charAt(lastIdx))) {
            --lastIdx;
        }
        if (lastIdx == idx) {
            lastIdx = origLast;
        }
        buffer.append(tmpStr.substring(idx, lastIdx));
        
        if (Character.isWhitespace(tmpStr.charAt(lastIdx))) {
            lastIdx++;
        }
        return lastIdx;
    }

    private void addWhiteNamespace(StringBuilder strbuffer, int count) {

        for (int i = 0; i < count; i++) {
            strbuffer.append(" ");
        }
    }

    public String getDetailedUsage(String id) {
        String result = null;
        Element element = toolspec.getElementById(id);
        
        List<Element> annotations = DOMUtils.findAllElementsByTagNameNS(element,
                                                                     Tool.TOOL_SPEC_PUBLIC_ID, 
                                                                     "annotation");
        
        
        if ((annotations != null) && (annotations.size() > 0)) {
            result = annotations.get(0).getFirstChild().getNodeValue();
        }
        return result;
    }

    public String getToolUsage() {
        return toolspec.getAnnotation();
    }

}




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