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/**
 * 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.java2wsdl.processor;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.xml.namespace.QName;
import javax.xml.ws.BindingType;
import javax.xml.ws.soap.SOAPBinding;

import org.apache.cxf.Bus;
import org.apache.cxf.BusFactory;
import org.apache.cxf.common.WSDLConstants;
import org.apache.cxf.common.i18n.Message;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.service.ServiceBuilder;
import org.apache.cxf.service.model.EndpointInfo;
import org.apache.cxf.service.model.ServiceInfo;
import org.apache.cxf.tools.common.Processor;
import org.apache.cxf.tools.common.ToolConstants;
import org.apache.cxf.tools.common.ToolContext;
import org.apache.cxf.tools.common.ToolException;
import org.apache.cxf.tools.java2wsdl.generator.AbstractGenerator;
import org.apache.cxf.tools.java2wsdl.generator.WSDLGeneratorFactory;
import org.apache.cxf.tools.java2wsdl.generator.wsdl11.FaultBeanGenerator;
import org.apache.cxf.tools.java2wsdl.generator.wsdl11.WrapperBeanGenerator;
import org.apache.cxf.tools.java2wsdl.processor.internal.ServiceBuilderFactory;
import org.apache.cxf.tools.util.AnnotationUtil;


public class JavaToWSDLProcessor implements Processor {
    private static final Logger LOG = LogUtils.getL7dLogger(JavaToWSDLProcessor.class);
    private static final String DEFAULT_ADDRESS = "http://localhost:9090/hello";
    private static final String JAVA_CLASS_PATH = "java.class.path";
    private ToolContext context;
    private final List generators = new ArrayList();
    
    private void customize(ServiceInfo service) {
        if (context.containsKey(ToolConstants.CFG_TNS)) {
            String ns = (String)context.get(ToolConstants.CFG_TNS);
            service.setTargetNamespace(ns);
        }

        if (context.containsKey(ToolConstants.CFG_PORT)) {
            String portName = (String)context.get(ToolConstants.CFG_PORT);
            EndpointInfo einfo = service.getEndpoints().iterator().next();
            QName qn = new QName(einfo.getName().getNamespaceURI(), portName);
            einfo.setName(qn);
        }

        if (context.containsKey(ToolConstants.CFG_SERVICENAME)) {
            String svName = getServiceName();
            service.setName(new QName(service.getName().getNamespaceURI(), svName));
        }
        EndpointInfo endpointInfo = service.getEndpoints().iterator().next();
        String address = ToolConstants.DEFAULT_ADDRESS + "/" + endpointInfo.getName().getLocalPart();
        if (context.get(ToolConstants.CFG_ADDRESS) != null) {
            address = (String)context.get(ToolConstants.CFG_ADDRESS);          
        }
        endpointInfo.setAddress(address);
        context.put(ToolConstants.CFG_ADDRESS, address);
        
    }
    
    
    public void process() throws ToolException {
        String oldClassPath = System.getProperty(JAVA_CLASS_PATH);
        LOG.log(Level.FINE, "OLD_CP", oldClassPath);
        if (context.get(ToolConstants.CFG_CLASSPATH) != null) {
            String newCp = (String)context.get(ToolConstants.CFG_CLASSPATH);
            System.setProperty(JAVA_CLASS_PATH, newCp + File.pathSeparator + oldClassPath);
            LOG.log(Level.FINE, "NEW_CP", newCp);
        }

        // check for command line specification of data binding.
       

        ServiceBuilder builder = getServiceBuilder();
        ServiceInfo service = builder.createService();

        customize(service);
        

        File wsdlFile = getOutputFile(builder.getOutputFile(),
                                      service.getName().getLocalPart() + ".wsdl");

        File outputDir = getOutputDir(wsdlFile);
        if (context.containsKey(ToolConstants.CFG_WSDL)) {
            generators.add(getWSDLGenerator(wsdlFile));
        }
        if (context.containsKey(ToolConstants.CFG_WRAPPERBEAN)) {
            generators.add(getWrapperBeanGenerator());
            generators.add(getFaultBeanGenerator());
            
        }
        generate(service, outputDir);
        List serviceList = new ArrayList();
        serviceList.add(service);
        context.put(ToolConstants.SERVICE_LIST, serviceList);
        System.setProperty(JAVA_CLASS_PATH, oldClassPath);
        LOG.log(Level.FINE, "RESUME_CP", oldClassPath);
    }

    private AbstractGenerator getWrapperBeanGenerator() {
        WrapperBeanGenerator generator = new WrapperBeanGenerator();
        generator.setOutputBase(getSourceDir());
        generator.setCompileToDir(getClassesDir());
        return generator;
    }

    private AbstractGenerator getFaultBeanGenerator() {
        FaultBeanGenerator generator = new FaultBeanGenerator();
        generator.setOutputBase(getSourceDir());
        generator.setCompileToDir(getClassesDir());
        return generator;
    }

    private AbstractGenerator getWSDLGenerator(final File wsdlFile) {
        WSDLGeneratorFactory factory = new WSDLGeneratorFactory();
        factory.setWSDLVersion(getWSDLVersion());

        AbstractGenerator generator = factory.newGenerator();
        generator.setAllowImports(context.containsKey(ToolConstants.CFG_CREATE_XSD_IMPORTS));
        generator.setOutputBase(wsdlFile);
        return generator;
    }

    public void generate(ServiceInfo service, File output) throws ToolException {
        for (AbstractGenerator generator : generators) {
            generator.setServiceModel(service);
            generator.setBus(getBus());
            generator.generate(output);
        }
    }

    @SuppressWarnings("unchecked")
    public ServiceBuilder getServiceBuilder() throws ToolException {
        Object beanFilesParameter = context.get(ToolConstants.CFG_BEAN_CONFIG);
        List beanDefinitions = new ArrayList();
        if (beanFilesParameter != null) {
            if (beanFilesParameter instanceof String) {
                beanDefinitions.add((String)beanFilesParameter);
            } else if (beanFilesParameter instanceof List) {
                // is there a better way to avoid the warning?
                beanDefinitions.addAll((List)beanFilesParameter);
            } else {
                String list[] = (String[]) beanFilesParameter;
                for (String b : list) {
                    beanDefinitions.add(b);
                }
            }
        }
        
        ServiceBuilderFactory builderFactory 
            = ServiceBuilderFactory.getInstance(beanDefinitions,
                                                getDataBindingName());
        Class clz = getServiceClass();
        context.put(Class.class, clz);
        if (clz.isInterface()) {
            context.put(ToolConstants.GEN_FROM_SEI, Boolean.TRUE);
            context.put(ToolConstants.SEI_CLASS, clz.getName());
        } else {
            context.put(ToolConstants.IMPL_CLASS, clz.getName());
            if (clz.getInterfaces().length == 1) {
                context.put(ToolConstants.SEI_CLASS, clz.getInterfaces()[0].getName());
            }
            //TODO: if it is simple frontend, and the impl class implments 
            //multiple interfaces
            context.put(ToolConstants.GEN_FROM_SEI, Boolean.FALSE); 
        }
        builderFactory.setServiceClass(clz);
        builderFactory.setDatabindingName(getDataBindingName());
        // The service class determines the frontend, so no need to pass it in twice.
        ServiceBuilder builder = builderFactory.newBuilder();

        builder.validate();

        if (context.get(ToolConstants.CFG_ADDRESS) != null) {
            String address = (String)context.get(ToolConstants.CFG_ADDRESS);
            builder.setAddress(address);
        } else {
            builder.setAddress(DEFAULT_ADDRESS);
        }
        builder.setTransportId(getTransportId());
        builder.setBus(getBus());
        builder.setBindingId(getBindingId());

        return builder;
    }

    protected String getTransportId() {
        if (isSOAP12()) {
            return WSDLConstants.NS_SOAP12;
        }
        return WSDLConstants.NS_SOAP11;
    }

    protected String getBindingId() {
        if (isSOAP12()) {
            return WSDLConstants.NS_SOAP12;
        } else {
            return WSDLConstants.NS_SOAP11;
        }
    }

    protected boolean isSOAP12() {
        if (!this.context.optionSet(ToolConstants.CFG_SOAP12)) {
            BindingType bType = getServiceClass().getAnnotation(BindingType.class);
            if (bType != null) {
                return SOAPBinding.SOAP12HTTP_BINDING.equals(bType.value());
            }
            return false;
        }
        return true;
    }

    protected File getOutputDir(File wsdlLocation) {
        String dir = (String)context.get(ToolConstants.CFG_OUTPUTDIR);
        if (dir == null) {
            if (wsdlLocation == null 
                || wsdlLocation.getParentFile() == null
                || !wsdlLocation.getParentFile().exists()) {
                dir = "./";
            } else {
                dir = wsdlLocation.getParent();
            } 
        }
        return new File(dir);
    }

    protected File getOutputFile(File nameFromClz, String defaultOutputFile) {
        String output = (String) context.get(ToolConstants.CFG_OUTPUTFILE);
        String dir = (String)context.get(ToolConstants.CFG_OUTPUTDIR);
        if (dir == null) {
            dir = "./";
        }

        File result;
        if (output != null) {
            result = new File(output);
            if (!result.isAbsolute()) {
                result = new File(new File(dir), output);
            }
        } else {
            result = new File(new File(dir), defaultOutputFile);
        }
        if (nameFromClz != null) {
            result = nameFromClz;
        }

        // rename the exising wsdl file
        if (result.exists()
            && !result.renameTo(new File(result.getParent(), result.getName()))) {
            throw new ToolException(new Message("OUTFILE_EXISTS", LOG));
        }
        return result;
    }

    public Class getServiceClass() {
        return AnnotationUtil.loadClass((String)context.get(ToolConstants.CFG_CLASSNAME),
                                        Thread.currentThread().getContextClassLoader());
    }

    public WSDLConstants.WSDLVersion getWSDLVersion() {
        String version = (String) context.get(ToolConstants.CFG_WSDL_VERSION);
        WSDLConstants.WSDLVersion wsVersion = WSDLConstants.getVersion(version);
        if (wsVersion == WSDLConstants.WSDLVersion.UNKNOWN) {
            wsVersion = WSDLConstants.WSDLVersion.WSDL11;
        }
        return wsVersion;
    }

    public String getServiceName() {
        return (String) this.context.get(ToolConstants.CFG_SERVICENAME);
    }

    File getSourceDir() {
        String dir = (String) this.context.get(ToolConstants.CFG_SOURCEDIR);
        if (StringUtils.isEmpty(dir)) {
            return null;
        }
        return new File(dir);
    }
    File getClassesDir() {
        String dir = (String) this.context.get(ToolConstants.CFG_CLASSDIR);
        if (StringUtils.isEmpty(dir)) {
            return null;
        }
        return new File(dir);
    }

    public Bus getBus() {
        return BusFactory.getThreadDefaultBus();
    }

    public void setEnvironment(ToolContext env) {
        this.context = env;
    }

    public ToolContext getEnvironment() {
        return this.context;
    }
    
    public String getDataBindingName() {
        String databindingName = (String)context.get(ToolConstants.CFG_DATABINDING);
        if (databindingName == null) {
            databindingName = ToolConstants.DEFAULT_DATA_BINDING_NAME;
        }
        return databindingName;
    }
}




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