/*
 * 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.netbeans.modules.maven.jaxws;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.maven.artifact.Artifact;
import org.codehaus.plexus.util.xml.Xpp3Dom;
import org.netbeans.api.java.classpath.ClassPath;
import org.netbeans.api.java.project.JavaProjectConstants;
import org.netbeans.api.project.Project;
import org.netbeans.api.project.ProjectUtils;
import org.netbeans.api.project.SourceGroup;
import org.netbeans.modules.maven.api.ModelUtils;
import org.netbeans.modules.maven.api.NbMavenProject;
import org.netbeans.modules.maven.model.ModelOperation;
import org.netbeans.modules.maven.model.Utilities;
import org.netbeans.modules.maven.model.pom.Dependency;
import org.netbeans.modules.maven.model.pom.Repository;
import org.openide.filesystems.FileObject;
import javax.xml.namespace.QName;
import org.apache.maven.project.MavenProject;
import org.netbeans.modules.javaee.specs.support.api.JaxWs;
import org.netbeans.modules.maven.model.pom.Build;
import org.netbeans.modules.maven.model.pom.Configuration;
import org.netbeans.modules.maven.model.pom.POMExtensibilityElement;
import org.netbeans.modules.maven.model.pom.POMModel;
import org.netbeans.modules.maven.model.pom.POMQName;
import org.netbeans.modules.maven.model.pom.Plugin;
import org.netbeans.modules.maven.model.pom.PluginExecution;
import org.netbeans.modules.maven.model.pom.Resource;
import org.netbeans.modules.websvc.wsstack.api.WSStack;

/**
 *
 * @author mkuchtiak
 */
public final class MavenModelUtils {

    private static final String WSIPMORT_GENERATE_PREFIX = "wsimport-generate-"; //NOI18N
    private static final String STALE_FILE_DIRECTORY = "${project.build.directory}/jaxws/stale/"; //NOI18N
    private static final String STALE_FILE_EXTENSION = ".stale"; //NOI18N
    public static final String JAXWS_GROUP_ID = "org.jvnet.jax-ws-commons"; //NOI18N
    public static final String JAXWS_ARTIFACT_ID = "jaxws-maven-plugin"; //NOI18N
    public static final String JAXWS_PLUGIN_KEY = JAXWS_GROUP_ID+":"+JAXWS_ARTIFACT_ID; //NOI18N
    private static final String JAXWS_CATALOG = "jax-ws-catalog.xml"; //NOI18N
    public static final String JAX_WS_PLUGIN_VERSION = "2.3"; //NOI18N

    /**
     * adds jaxws plugin, requires the model to have a transaction started,
     * eg. by calling as part of Utilities.performPOMModelOperations(ModelOperation<POMModel>)
     * @param model POMModel
     * @return JAX-WS Plugin instance
     */
    public static Plugin addJaxWSPlugin(POMModel model) {
        return MavenModelUtils.addJaxWSPlugin(model, null);
    }

    /**
     * adds jaxws plugin, requires the model to have a transaction started,
     * eg. by calling as part of Utilities.performPOMModelOperations(ModelOperation<POMModel>)
     * @param model POMModel
     * @param jaxWsVersion version of sources to generate. Value null means default version.
     * @return JAX-WS Plugin instance
     */
    public static Plugin addJaxWSPlugin(POMModel model, String jaxWsVersion) {
        assert model.isIntransaction() : "need to call model modifications under transaction."; //NOI18N
        Build bld = model.getProject().getBuild();
        if (bld == null) {
            bld = model.getFactory().createBuild();
            model.getProject().setBuild(bld);
        }
        Plugin plugin = bld.findPluginById(JAXWS_GROUP_ID, JAXWS_ARTIFACT_ID);
        if (plugin != null) {
            //TODO CHECK THE ACTUAL PARAMETER VALUES..
            return plugin;
        }
        plugin = model.getFactory().createPlugin();
        plugin.setGroupId(JAXWS_GROUP_ID);
        plugin.setArtifactId(JAXWS_ARTIFACT_ID);
        plugin.setVersion(JAX_WS_PLUGIN_VERSION); 
        bld.addPlugin(plugin);

        // setup global configuration
        Configuration config = plugin.getConfiguration();
        if (config == null) {
            config = model.getFactory().createConfiguration();
            plugin.setConfiguration(config);
        }
        config.setSimpleParameter("sourceDestDir", "${project.build.directory}/generated-sources/jaxws-wsimport"); //NOI18N
        config.setSimpleParameter("xnocompile", "true"); //NOI18N
        config.setSimpleParameter("verbose", "true"); //NOI18N
        config.setSimpleParameter("extension", "true"); //NOI18N
        config.setSimpleParameter("catalog", "${basedir}/" + MavenJAXWSSupportImpl.CATALOG_PATH);
        if (jaxWsVersion != null) {
            config.setSimpleParameter("target", jaxWsVersion); //NOI18N
        }
        Dependency webservicesDep = model.getFactory().createDependency();
        webservicesDep.setGroupId("javax.xml"); //NOI18N
        webservicesDep.setArtifactId("webservices-api"); //NOI18N
        webservicesDep.setVersion("2.0"); //NOI18N
        plugin.addDependency(webservicesDep);
        return plugin; 
    }

    /** Adds WAR plugin.
     *
     * @param model
     * @return WAR plugin
     */
    public static Plugin addWarPlugin(POMModel model, boolean client) {
        assert model.isIntransaction() : "need to call model modifications under transaction."; //NOI18N
        Build bld = model.getProject().getBuild();
        if (bld == null) {
            bld = model.getFactory().createBuild();
            model.getProject().setBuild(bld);
        }
        Plugin plugin = bld.findPluginById("org.apache.maven.plugins", "maven-war-plugin"); //NOI18N
        if (plugin == null) {
            plugin = model.getFactory().createPlugin();
            plugin.setGroupId("org.apache.maven.plugins"); //NOI18N
            plugin.setArtifactId("maven-war-plugin"); //NOI18N
            plugin.setVersion("2.0.2"); //NOI18N
            bld.addPlugin(plugin);
        }

        Configuration config = plugin.getConfiguration();
        if (config == null) {
            config = model.getFactory().createConfiguration();
            plugin.setConfiguration(config);
        }
        POMExtensibilityElement webResources = findChild(config.getConfigurationElements(), "webResources");
        if (webResources == null) {
            webResources = model.getFactory().createPOMExtensibilityElement(
                    POMQName.createQName("webResources", model.getPOMQNames().isNSAware()));
            config.addExtensibilityElement(webResources);
        }
        //check for resource containing jax-ws-catalog.xml
        List<String> includes = new ArrayList<String>(2);
        Collections.addAll(includes, JAXWS_CATALOG, "wsdl/**"); // NOI18N
        if (!hasResource(webResources, JAXWS_CATALOG, "WEB-INF")) { // NOI18N
            addResource(model, webResources, "WEB-INF", includes); // NOI18N
        }
        if (client && !hasResource(webResources, JAXWS_CATALOG, "WEB-INF/classes/META-INF")) { // NOI18N
            addResource(model, webResources, "WEB-INF/classes/META-INF", includes); // NOI18N
        }
        return plugin; 
    }

    /** Adds wsdl Resource.
     *
     * @param handle ModelHandle object
     */
    
    public static void addWsdlResources(POMModel model) {
        assert model.isIntransaction();
        Build bld = model.getProject().getBuild();
        if (bld == null) {
            return;
        }
        boolean foundResourceForMetaInf = false;
        boolean mainResourcesFound = false;
        List<Resource> resources = bld.getResources();
        if (resources != null) {
            for (Resource resource : resources) {
                if ("META-INF".equals(resource.getTargetPath())
                     && ("src".equals(resource.getDirectory()) || "${basedir}/src".equals(resource.getDirectory()))) { //NOI18N
                    foundResourceForMetaInf = true;
                    //TODO shall we chckf or jax-ws-catalog.xml + wsdl includes?
                }
                else if ( "src/main/resources".equals(resource.getDirectory())){
                    mainResourcesFound = true;
                }
            }
        }
        if (!foundResourceForMetaInf) {
            Resource res = model.getFactory().createResource();
            res.setTargetPath("META-INF"); //NOI18N
            res.setDirectory("src"); //NOI18N
            res.addInclude("jax-ws-catalog.xml"); //NOI18N
            res.addInclude("wsdl/**"); //NOI18N
            bld.addResource(res);
        }
        if ( !mainResourcesFound ){
            Resource res = model.getFactory().createResource();
            res.setDirectory("src/main/resources"); //NOI18N
            bld.addResource(res);
        }

    }

    

    private static POMExtensibilityElement findChild(List<POMExtensibilityElement> elems, String name) {
        for (POMExtensibilityElement e : elems) {
            if (name.equals(e.getQName().getLocalPart())) {
                return e;
            }
        }
        return null;
    }

    private static POMExtensibilityElement findElementForValue(List<POMExtensibilityElement> elems, String value) {
        for (POMExtensibilityElement e : elems) {
            if (value.equals(e.getElementText())) {
                return e;
            }
        }
        return null;
    }

    public static void addWsimportExecution(Plugin plugin, String id, String wsdlPath, String originalUrl) {
        addWsimportExecution(plugin, id, wsdlPath, originalUrl, null);
    }

    public static void addWsimportExecution(Plugin plugin, String id, String wsdlPath,
            String originalUrl, String packageName ) {
        POMModel model = plugin.getModel();
        assert model.isIntransaction();

        PluginExecution exec = model.getFactory().createExecution();
        String uniqueId = getUniqueId(plugin, id);
        exec.setId(WSIPMORT_GENERATE_PREFIX+uniqueId);
        exec.setPhase("generate-sources"); //NOI18N
        exec.addGoal("wsimport"); //NOI18N
        plugin.addExecution(exec);

        Configuration config = model.getFactory().createConfiguration();
        exec.setConfiguration(config);

        QName qname = POMQName.createQName("wsdlFiles", model.getPOMQNames().isNSAware()); //NOI18N
        POMExtensibilityElement wsdlFiles = model.getFactory().createPOMExtensibilityElement(qname);
        config.addExtensibilityElement(wsdlFiles);

        if (packageName != null) {
            qname = POMQName.createQName("packageName", model.getPOMQNames().isNSAware()); //NOI18N
            POMExtensibilityElement packageNameElement = model.getFactory().createPOMExtensibilityElement(qname);
            packageNameElement.setElementText(packageName);
            config.addExtensibilityElement(packageNameElement);
        }

        qname = POMQName.createQName("wsdlFile", model.getPOMQNames().isNSAware()); //NOI18N
        POMExtensibilityElement wsdlFile = model.getFactory().createPOMExtensibilityElement(qname);
        wsdlFile.setElementText(wsdlPath);
        wsdlFiles.addExtensibilityElement(wsdlFile);

        //adding <vmArgs><vmArg>-Djavax.xml.accessExternalSchema=all</vmArg></vmArgs>; see issue #244891
        qname = POMQName.createQName("vmArgs", model.getPOMQNames().isNSAware()); //NOI18N
        POMExtensibilityElement vmArgs = model.getFactory().createPOMExtensibilityElement(qname);
        config.addExtensibilityElement(vmArgs);

        qname = POMQName.createQName("vmArg", model.getPOMQNames().isNSAware()); //NOI18N
        POMExtensibilityElement vmArg = model.getFactory().createPOMExtensibilityElement(qname);
        vmArg.setElementText("-Djavax.xml.accessExternalSchema=all"); //NOI18N
        vmArgs.addExtensibilityElement(vmArg);

        if ( originalUrl != null ){
            qname = POMQName.createQName("wsdlLocation", model.getPOMQNames().
                    isNSAware()); //NOI18N
            POMExtensibilityElement wsdlLocation = 
                model.getFactory().createPOMExtensibilityElement(qname);
            wsdlLocation.setElementText(originalUrl);
            config.addExtensibilityElement(wsdlLocation);
        }

        qname = POMQName.createQName("staleFile", model.getPOMQNames().isNSAware()); //NOI18N
        POMExtensibilityElement staleFile = model.getFactory().createPOMExtensibilityElement(qname);
        staleFile.setElementText(STALE_FILE_DIRECTORY+uniqueId+STALE_FILE_EXTENSION);
        config.addExtensibilityElement(staleFile);
    }

    public static void addBindingFile(POMModel model, String id, String bindingFilePath) {
        assert model.isIntransaction();
        Build bld = model.getProject().getBuild();
        if (bld == null) {
            return;
        }
        Plugin plugin = bld.findPluginById(JAXWS_GROUP_ID, JAXWS_ARTIFACT_ID);
        if (plugin != null) {
            List<PluginExecution> executions = plugin.getExecutions();
            String execId = WSIPMORT_GENERATE_PREFIX+id;
            for (PluginExecution exec : executions) {
                if (execId.equals(exec.getId())) {
                    Configuration config = exec.getConfiguration();
                    if (config != null) {
                        QName qname = POMQName.createQName("bindingDirectory", model.getPOMQNames().isNSAware()); //NOI18N
                        if (config.getChildElementText(qname) == null) {
                            POMExtensibilityElement bindingDir = model.getFactory().createPOMExtensibilityElement(qname);
                            bindingDir.setElementText("${basedir}/src/jaxws-bindings");
                            config.addExtensibilityElement(bindingDir);
                        }
                        POMExtensibilityElement bindingFiles =
                                findChild(config.getConfigurationElements(), "bindingFiles"); //NOI18N
                        if (bindingFiles == null) {
                            qname = POMQName.createQName("bindingFiles", model.getPOMQNames().isNSAware()); //NOI18N
                            bindingFiles = model.getFactory().createPOMExtensibilityElement(qname);
                            config.addExtensibilityElement(bindingFiles);
                        }

                        POMExtensibilityElement bindingFile =
                                findElementForValue(bindingFiles.getExtensibilityElements(), bindingFilePath);
                        if (bindingFile == null) {
                            qname = POMQName.createQName("bindingFile", model.getPOMQNames().isNSAware()); //NOI18N
                            bindingFile = model.getFactory().createPOMExtensibilityElement(qname);
                            bindingFile.setElementText(bindingFilePath);
                            bindingFiles.addExtensibilityElement(bindingFile);
                        }
                    }
                    break;
                }
            }
        }
    }

    public static void removeWsimportExecution(POMModel model, String id) {
        assert model.isIntransaction();
        Build bld = model.getProject().getBuild();
        if (bld == null) {
            return;
        }
        Plugin plugin = bld.findPluginById(JAXWS_GROUP_ID, JAXWS_ARTIFACT_ID);
        if (plugin != null) {
            List<PluginExecution> executions = plugin.getExecutions();
            if (executions != null) {
                for (PluginExecution exec : executions) {
                    String execId = WSIPMORT_GENERATE_PREFIX+id;
                    if (execId.equals(exec.getId())) {
                        plugin.removeExecution(exec);
                        break;
                    }
                }
            }
        }
    }

    public static void renameWsdlFile(POMModel model, String oldId, String newId, String oldWsdlPath, String newWsdlPath) {
        assert model.isIntransaction();
        Build bld = model.getProject().getBuild();
        if (bld == null) {
            return;
        }
        Plugin plugin = bld.findPluginById(JAXWS_GROUP_ID, JAXWS_ARTIFACT_ID);
        if (plugin != null) {
            List<PluginExecution> executions = plugin.getExecutions();
            String execId = WSIPMORT_GENERATE_PREFIX+oldId;
            for (PluginExecution exec : executions) {
                Configuration config = exec.getConfiguration();
                if (config != null && execId.equals(exec.getId())) {
                    // replace wsdlFile element
                    POMExtensibilityElement wsdlFiles = findChild(config.getConfigurationElements(), "wsdlFiles"); //NOI18N
                    if (wsdlFiles != null) {
                        List<POMExtensibilityElement> files = wsdlFiles.getExtensibilityElements();
                        for (POMExtensibilityElement el : files) {
                            if ("wsdlFile".equals(el.getQName().getLocalPart()) && //NOI18N
                                oldWsdlPath.equals(el.getElementText())) {
                                el.setElementText(newWsdlPath);
                                break;
                            }
                        }
                    }
                    // replace staleFile element
                    POMExtensibilityElement staleFile = findChild(config.getConfigurationElements(), "staleFile"); //NOI18N
                    if (staleFile != null) {
                        staleFile.setElementText(STALE_FILE_DIRECTORY+newId+STALE_FILE_EXTENSION);
                    }
                    // replace exec id
                    exec.setId(WSIPMORT_GENERATE_PREFIX+newId);
                    break;
                }
            }
        }
    }

    /** Add Metro Library.
     *
     * @param project Project
     */
    public static void addMetroLibrary(Project project) {
        WSStack<JaxWs> wsStack = new WSStackUtils(project).getWsStack(JaxWs.class);
        String scope = null;
        if (wsStack != null && wsStack.isFeatureSupported(JaxWs.Feature.WSIT)) {
            scope = Artifact.SCOPE_PROVIDED;
        }
        ModelUtils.addDependency(project.getProjectDirectory().getFileObject("pom.xml"), 
                "org.glassfish.metro", 
                "webservices-rt", 
                "2.3", 
                null, scope, null, false);
    }

    /** Detect JAX-WS Library in project.
     *
     * @param project Project
     * @return true if library was detected
     */
    public static boolean hasJaxWsAPI(Project project) {
        SourceGroup[] srcGroups = ProjectUtils.getSources(project).getSourceGroups(
                JavaProjectConstants.SOURCES_TYPE_JAVA);
        if (srcGroups.length > 0) {
            ClassPath classPath = ClassPath.getClassPath(srcGroups[0].getRootFolder(), ClassPath.BOOT);
            FileObject wsFeature = classPath.findResource("javax/xml/ws/WebServiceFeature.class"); // NOI18N
            if (wsFeature == null) {
                classPath = ClassPath.getClassPath(srcGroups[0].getRootFolder(), ClassPath.COMPILE);
                wsFeature = classPath.findResource("javax/xml/ws/WebServiceFeature.class"); // NOI18N
                if (wsFeature == null) {
                    return false;
                }
            }
        }
        return true;
    }

    /** Add Javadoc to project
     * @param project Project
     */
    public static void addJavadoc(final Project project) {
        NbMavenProject mavenProject = project.getLookup().lookup(NbMavenProject.class);
        if (mavenProject != null) {
            mavenProject.downloadDependencyAndJavadocSource(false);
        }
    }

    /** get list of wsdl files in Maven project
     *
     * @param project Maven project instance
     * @return list of wsdl files
     */
    static List<WsimportPomInfo> getWsdlFiles(Project project) {
        MavenProject mavenProject = project.getLookup().lookup(NbMavenProject.class).getMavenProject();
        assert mavenProject != null;
        @SuppressWarnings("unchecked")
        List<org.apache.maven.model.Plugin> plugins = mavenProject.getBuildPlugins();
        List<WsimportPomInfo> wsdlList = new ArrayList<WsimportPomInfo>();
        for (org.apache.maven.model.Plugin plg : plugins) {
            if (JAXWS_PLUGIN_KEY.equalsIgnoreCase(plg.getKey())) {
                @SuppressWarnings("unchecked")
                List<org.apache.maven.model.PluginExecution> executions = plg.getExecutions();
                for (org.apache.maven.model.PluginExecution exec : executions) {
                    Xpp3Dom conf =  (Xpp3Dom)exec.getConfiguration();
                    if (conf != null) {
                        Xpp3Dom wsdlFiles = conf.getChild("wsdlFiles"); //NOI18N
                        if (wsdlFiles != null) {
                            Xpp3Dom wsdlFile = wsdlFiles.getChild("wsdlFile"); //NOI18N
                            if (wsdlFile != null) {
                                WsimportPomInfo pomInfo = new WsimportPomInfo(wsdlFile.getValue());
                                // detect handler binding file
                                Xpp3Dom bindingFiles = conf.getChild("bindingFiles"); //NOI18N
                                if (bindingFiles != null) {
                                    String bindingPath = findHandler(bindingFiles);
                                    if (bindingPath != null) {
                                        pomInfo.setHandlerFile(bindingPath);
                                    }
                                }
                                String execId = exec.getId();
                                if (execId != null) {
                                    if (execId.startsWith(WSIPMORT_GENERATE_PREFIX)) {
                                        pomInfo.setId(execId.substring(WSIPMORT_GENERATE_PREFIX.length()));
                                    } else {
                                        pomInfo.setId(execId);
                                    }
                                }
                                wsdlList.add(pomInfo);
                            }
                        }
                    }
                }
            }
        }
        return wsdlList;
    }

    private static String findHandler(Xpp3Dom parent) {
        for (Xpp3Dom child : parent.getChildren("bindingFile")) { //NOI18N
            String bindingPath = child.getValue();
            if (bindingPath != null && bindingPath.endsWith("_handler.xml")) { //NOI18N
                return bindingPath;
            }
        }
        return null;
    }

    private static void updateLibraryScope(POMModel model, String groupId, String targetScope) {
        assert model.isIntransaction() : "need to call model modifications under transaction."; //NOI18N
        Dependency wsDep = model.getProject().findDependencyById(groupId, "webservices-rt", null); //NOI18N
        if (wsDep != null) {
            wsDep.setScope(targetScope);
        }
    }

    /** Update dependency scope for webservices-rt.
     *
     * @param prj Project
     */
    static void reactOnServerChanges(final Project prj) {
        NbMavenProject nb = prj.getLookup().lookup(NbMavenProject.class);
        @SuppressWarnings("unchecked")
        List<org.apache.maven.model.Dependency> deps = nb.getMavenProject().getDependencies();
        String metroScope = null;
        boolean foundMetroDep = false;
        String groupId = null;
        for (org.apache.maven.model.Dependency dep:deps) {
            if ("com.sun.xml.ws".equals(dep.getGroupId()) && "webservices-rt".equals(dep.getArtifactId())) { //NOI18N
                String scope = dep.getScope();
                metroScope = scope == null ? "compile" : scope; //NOI18N
                foundMetroDep = true;
                groupId = "com.sun.xml.ws";
                break;
            } else if ("org.glassfish.metro".equals(dep.getGroupId()) && "webservices-rt".equals(dep.getArtifactId())) { //NOI18N
                String scope = dep.getScope();
                metroScope = scope == null ? "compile" : scope; //NOI18N
                foundMetroDep = true;
                groupId = "org.glassfish.metro";
                break;
            }
        }
        String updateScopeTo = null;
        if (foundMetroDep) {
            WSStack<JaxWs> wsStack = new WSStackUtils(prj).getWsStack(JaxWs.class);
            if (wsStack != null) {
                if (wsStack.isFeatureSupported(JaxWs.Feature.WSIT)) {
                    if ("compile".equals(metroScope)) { //NOI18N
                        updateScopeTo = "provided"; //NOI18N
                    }
                } else {
                    if ("provided".equals(metroScope)) {
                        updateScopeTo = "compile"; //NOI18N
                    }
                }
            }/* 
                Fix for BZ#198531 - Netbeans automatically modifies dependency scope of webservices-rt in pom.xml 
                else {
                if ("compile".equals(metroScope)) { //NOI18N
                    updateScopeTo = "provided"; //NOI18N
                }
            }*/
            if (updateScopeTo != null) {
                final String targetScope = updateScopeTo;
                final String grpId = groupId;
                ModelOperation<POMModel> operation = new ModelOperation<POMModel>() {
                    @Override
                    public void performOperation(POMModel model) {
                        // update webservices-rt library dependency scope (provided or compile)
                        // depending whether J2EE Server contains metro jars or not
                        updateLibraryScope(model, grpId, targetScope);
                    }
                };
                Utilities.performPOMModelOperations(prj.getProjectDirectory().getFileObject("pom.xml"), //NOI18N
                        Collections.singletonList(operation));
            }
        }
    }

    private static void addResource(POMModel model, POMExtensibilityElement webResources,
            String targetPath, List<String> includes) {
        POMExtensibilityElement res = model.getFactory().createPOMExtensibilityElement(
                POMQName.createQName("resource", model.getPOMQNames().isNSAware()));
        webResources.addExtensibilityElement(res);
        POMExtensibilityElement dir = model.getFactory().createPOMExtensibilityElement(
                POMQName.createQName("directory", model.getPOMQNames().isNSAware()));
        dir.setElementText("src");
        res.addExtensibilityElement(dir);

        POMExtensibilityElement tp = model.getFactory().createPOMExtensibilityElement(POMQName.createQName("targetPath",
                model.getPOMQNames().isNSAware()));
        tp.setElementText(targetPath);
        res.addExtensibilityElement(tp);

        POMExtensibilityElement in = model.getFactory().createPOMExtensibilityElement(POMQName.createQName("includes",
                model.getPOMQNames().isNSAware()));
        res.addExtensibilityElement(in);

        for (String includeString : includes) {
            POMExtensibilityElement include = model.getFactory().createPOMExtensibilityElement(POMQName.createQName("include",
                    model.getPOMQNames().isNSAware()));
            include.setElementText(includeString);
            in.addExtensibilityElement(include);
        }
    }

    private static boolean hasResource(POMExtensibilityElement webResources, String resourceName, String targetPath) {
        List<POMExtensibilityElement> resources = webResources.getChildren(POMExtensibilityElement.class);
        for (POMExtensibilityElement res : resources) {
            POMExtensibilityElement targetPathEl = findChild(res.getExtensibilityElements(), "targetPath"); //NOI18N
            if (targetPathEl != null && targetPath.equals(targetPathEl.getElementText())) {
                POMExtensibilityElement includesEl = findChild(res.getExtensibilityElements(), "includes"); //NOI18N
                if (includesEl != null) {
                    List<POMExtensibilityElement> includes = includesEl.getChildren(POMExtensibilityElement.class);
                    for (POMExtensibilityElement include : includes) {
                        if (resourceName.equals(include.getElementText())) {
                            return true;
                        }
                    }
                }
            }
        }
        return false;
    }

    public static String getUniqueId(Plugin plugin, String id) {
        String result = id;
        List<PluginExecution> executions = plugin.getExecutions();
        if (executions != null) {
            Set<String> execIdSet = new HashSet<String>();
            for (PluginExecution ex : executions) {
                String execId = ex.getId();
                if (execId != null) {
                    if (execId.startsWith(WSIPMORT_GENERATE_PREFIX)) {
                        execIdSet.add(execId.substring(WSIPMORT_GENERATE_PREFIX.length()));
                    } else {
                        execIdSet.add(execId);
                    }
                }
            }

            int i=1;
            while (execIdSet.contains(result)) {
                result = id+"_"+String.valueOf(i++); //NOI18N
            }
        }
        return result;
    }
}