Apache CXF example source code file (Option.java)

This example Apache CXF source code file (Option.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

dom, element, element, errorvisitor, list, list, log, logging, matches, option, setting, string, string, stringtokenizer, tokenconsumer, util, value_enum_separator, value_enum_separator

The Apache CXF Option.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.util.List;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;

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;

public class Option implements TokenConsumer {

    private static final Logger LOG = LogUtils.getL7dLogger(Option.class);
    private static final String VALUE_ENUM_SEPARATOR = "|";
    protected Element argument;
    protected Element annotation;
    private final Element element;
    private Element valueType;

    private int numMatches;

    public Option(Element el) {
        this.element = el;
        
        
        List<Element> elemList = DOMUtils.findAllElementsByTagNameNS(element, 
                                                                     Tool.TOOL_SPEC_PUBLIC_ID, 
                                                                     "associatedArgument");
        if (elemList != null && elemList.size() > 0) {            
            argument = (Element)elemList.get(0);
        }
        
        elemList = DOMUtils.findAllElementsByTagNameNS(element, 
                                                       Tool.TOOL_SPEC_PUBLIC_ID, 
                                                       "annotation");
        if (elemList != null && elemList.size() > 0) {            
            annotation = (Element)elemList.get(0);
        }

        if (annotation == null && argument != null) {
            elemList =  DOMUtils.findAllElementsByTagNameNS(argument, Tool.TOOL_SPEC_PUBLIC_ID, "annotation");

            if (elemList != null && elemList.size() > 0) {
                annotation = (Element)elemList.get(0);
            }
        }
    }

    public boolean hasArgument() {
        return argument != null;
    }

    public boolean hasImmediateArgument() {
        return hasArgument() && "immediate".equals(argument.getAttribute("placement"));
    }

    /**
     * @return whether the first token was accepted
     */
    public boolean accept(TokenInputStream args, Element result, ErrorVisitor errors) {

        if (args.available() == 0) {
            return false;
        }
        String arg = args.peek();

        if (arg == null) {
            LOG.severe("ARGUMENT_IS_NULL_MSG");
        }

        // go through each switch to see if we can match one to the arg.
        List<Element> switches = 
            DOMUtils.findAllElementsByTagNameNS(element, Tool.TOOL_SPEC_PUBLIC_ID, "switch");

        boolean accepted = false;

        for (Element switchElem : switches) {

            String switchArg = "-" + switchElem.getFirstChild().getNodeValue();
            if (LOG.isLoggable(Level.FINE)) {
                LOG.fine("switchArg is " + switchArg);
            }
            if (hasImmediateArgument() ? arg.startsWith(switchArg) : arg.equals(switchArg)) {
                LOG.fine("Matches a switch!!!");
                // consume the token
                args.read();
                // Add ourselves to the result document
                Element optionEl = result.getOwnerDocument()
                    .createElementNS("http://cxf.apache.org/Xutil/Command", "option");
 
                optionEl.setAttribute("name", getName());

                // Add argument value to result
                if (hasArgument()) {
                    String argValue;
                    if (hasImmediateArgument()) {
                        argValue = arg.substring(switchArg.length());
                    } else {
                        argValue = readArgumentValue(args, switchArg, errors);
                    }
                    if (argValue != null) {
                        if (LOG.isLoggable(Level.FINE)) {
                            LOG.fine("Setting argument value of option to " + argValue);
                        }
                        optionEl.appendChild(result.getOwnerDocument().createTextNode(argValue));

                    } else {
                        break;
                    }
                }
                result.appendChild(optionEl);
                numMatches++;
                accepted = true;
            }
        }
        return accepted;
    }

    private String readArgumentValue(TokenInputStream args, String switchArg, ErrorVisitor errors) {
        String value = null;
        if (args.available() > 0) {
            value = args.read();
            if (value.startsWith("-")) {
                errors.add(new ErrorVisitor.InvalidOption(switchArg));
                value = null;
            } else if (hasInvalidCharacter(value)) {
                errors.add(new ErrorVisitor.UserError(switchArg + " has invalid character!"));
            }
            if (!isInEnumArgumentValue(value)) {
                errors.add(new ErrorVisitor.UserError(switchArg + " " 
                                                      + value + " not in the enumeration value list!"));
            }
        } else {
            errors.add(new ErrorVisitor.InvalidOption(switchArg));
        }
        return value;
    }

    private boolean hasInvalidCharacter(String argValue) {
        
        List<Element> list = 
            DOMUtils.findAllElementsByTagNameNS(argument, Tool.TOOL_SPEC_PUBLIC_ID, "valuetype");
        //NodeList list = argument.getElementsByTagNameNS(Tool.TOOL_SPEC_PUBLIC_ID, "valuetype");
        String valuetypeStr = null;

        if (list != null && list.size() > 0) {
            valueType = (Element)list.get(0);
            valuetypeStr = valueType.getFirstChild().getNodeValue();

            if ("IdentifyString".equals(valuetypeStr)) {
                return !isIdentifyString(argValue);
            } else if ("NamingSpacePackageString".equals(valuetypeStr)) {
                return !isNamingSpacePackageString(argValue);
            } else if ("Digital".equals(valuetypeStr)) {
                for (int i = 0; i < argValue.length(); i++) {
                    if (!Character.isDigit(argValue.charAt(i))) {
                        return true;
                    }
                }
            }
        }
        return false;
    }
    
    private boolean isInEnumArgumentValue(String argValue) {
        boolean result = true;
        List<Element> list = 
            DOMUtils.findAllElementsByTagNameNS(argument, Tool.TOOL_SPEC_PUBLIC_ID, "valueenum");
        
        
        //NodeList list = argument.getElementsByTagNameNS(Tool.TOOL_SPEC_PUBLIC_ID, "valueenum");
        if (list != null && list.size() == 1) {
            result = false;
            String enumValue = list.get(0).getTextContent();
            StringTokenizer stk = new StringTokenizer(enumValue, VALUE_ENUM_SEPARATOR);
            if (stk.countTokens() <= 0) {
                return result;
            }
            while (stk.hasMoreTokens()) {
                if (argValue.equals(stk.nextToken())) {
                    result = true;
                }
            }
        }
        return result;
    }

    private boolean isIdentifyString(String value) {
        for (int i = 0; i < value.length(); i++) {
            if (value.charAt(i) == '.') {
                continue;
            } else {
                if (!Character.isJavaIdentifierPart(value.charAt(i))) {
                    return false;
                }
            }
        }
        return true;
    }

    private boolean isNamingSpacePackageString(String value) {
        if (value.indexOf("=") < 0) {
            return isIdentifyString(value);
        } else {
            String packageName = value.substring(value.indexOf("=") + 1, value.length());
            return isIdentifyString(packageName);
        }
    }

    
    public boolean isSatisfied(ErrorVisitor errors) {
        if (errors.getErrors().size() > 0) {
            return false;
        }
        if (LOG.isLoggable(Level.FINE)) {
            LOG.fine("For this option, minOccurs=" + element.getAttribute("minOccurs") + " and maxOccurs="
                     + element.getAttribute("maxOccurs") + ", numMatches currently " + numMatches);
        }
        boolean result = true;

        if (!isAtleastMinimum()) {
            errors.add(new ErrorVisitor.MissingOption(this));
            result = false;
        }
        if (result && !isNoGreaterThanMaximum()) {
            errors.add(new ErrorVisitor.DuplicateOption(getName()));
            result = false;
        }
        if (LOG.isLoggable(Level.FINE)) {
            LOG.fine("isSatisfied() returning " + result);
        }
        return result;
    }

    private boolean isAtleastMinimum() {
        boolean result = true;
        int minOccurs = 0;

        if (!"".equals(element.getAttribute("minOccurs"))) {
            result = numMatches >= Integer.parseInt(element.getAttribute("minOccurs"));
        } else {
            result = numMatches >= minOccurs;
        }
        return result;
    }

    private boolean isNoGreaterThanMaximum() {
        boolean result = true;
        int maxOccurs = 1;

        if (!"".equals(element.getAttribute("maxOccurs"))) {
            result = "unbounded".equals(element.getAttribute("maxOccurs"))
                     || numMatches <= Integer.parseInt(element.getAttribute("maxOccurs"));
        } else {
            result = numMatches <= maxOccurs;
        }
        return result;
    }

    public String getName() {
        return element.getAttribute("id");
    }

    public String getAnnotation() {
        return annotation.getFirstChild().getNodeValue();
    }

    public String getPrimarySwitch() {
        //NodeList switches = element.getElementsByTagNameNS(Tool.TOOL_SPEC_PUBLIC_ID, "switch");
        
        List<Element> switches = 
            DOMUtils.findAllElementsByTagNameNS(element, Tool.TOOL_SPEC_PUBLIC_ID, "switch");

        // options must have atleast one switch, as enforced by schema, so no
        // need for defensive coding.
        return switches.get(0).getFirstChild().getNodeValue();
    }

    public String toString() {
        return getName();
    }

}