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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.netbeans.modules.maven.debug;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.maven.artifact.DependencyResolutionRequiredException;
import org.apache.maven.project.MavenProject;
import org.netbeans.modules.maven.api.Constants;
import org.netbeans.modules.maven.api.NbMavenProject;
import org.netbeans.modules.maven.classpath.BootClassPathImpl;
import org.netbeans.modules.maven.spi.debug.AdditionalDebuggedProjects;
import org.netbeans.api.debugger.DebuggerManager;
import org.netbeans.api.debugger.jpda.MethodBreakpoint;
import org.netbeans.api.java.classpath.ClassPath;
import org.netbeans.api.java.platform.JavaPlatform;
import org.netbeans.api.java.platform.JavaPlatformManager;
import org.netbeans.api.java.queries.SourceForBinaryQuery;
import org.netbeans.api.project.Project;
import org.netbeans.modules.maven.api.FileUtilities;
import org.netbeans.spi.java.classpath.PathResourceImplementation;
import org.netbeans.spi.java.classpath.support.ClassPathSupport;
import org.netbeans.spi.project.AuxiliaryProperties;
import org.netbeans.spi.project.ProjectContainerProvider;
import org.netbeans.spi.project.SubprojectProvider;
import org.openide.ErrorManager;
import org.openide.filesystems.FileObject;
import org.openide.filesystems.FileUtil;
import org.openide.util.Utilities;

/**
 * various debugger related utility methods.
 * @author mkleint
 */
public class Utils {
    
    /** Creates a new instance of Utils */
    private Utils() {
    }
    
    public static MethodBreakpoint createBreakpoint(String stopClassName) {
        return createBreakpoint(stopClassName, "*");
    }
    
    public static MethodBreakpoint createBreakpoint(String stopClassName, String methodName) {
        MethodBreakpoint breakpoint = MethodBreakpoint.create(
                stopClassName,
                methodName
                );
//        breakpoint.setHidden(true);
        DebuggerManager.getDebuggerManager().addBreakpoint(breakpoint);
        return breakpoint;
    }
    
    
    public static URL[] convertStringsToURL(Collection strings) {
        URL[] fos = new URL[strings.size()];
        int index = 0;
        for (String str : strings) {
            fos[index] = fileToURL(FileUtilities.convertStringToFile(str));
            index++;
        }
        return fos;
    }
    
    private static Set collectClasspaths(Project prj) throws DependencyResolutionRequiredException {
        Set toRet = new HashSet();
        NbMavenProject watcher = prj.getLookup().lookup(NbMavenProject.class);
        MavenProject mproject = watcher.getMavenProject();
        //TODO this ought to be really configurable based on what class gets debugged.
        toRet.addAll(mproject.getTestClasspathElements());
        //for poms also include all module projects recursively..
        boolean isPom = NbMavenProject.TYPE_POM.equals(watcher.getPackagingType());
        if (isPom) {
            ProjectContainerProvider subs = prj.getLookup().lookup(ProjectContainerProvider.class);
            ProjectContainerProvider.Result res = subs.getContainedProjects();
            for (Project pr : res.getProjects()) {
                toRet.addAll(collectClasspaths(pr));
            }
        }
        return toRet;
    }
    private static Set collectSourceRoots(Project prj) {
        Set toRet = new HashSet();
        NbMavenProject watcher = prj.getLookup().lookup(NbMavenProject.class);
        MavenProject mproject = watcher.getMavenProject();
        //TODO this ought to be really configurable based on what class gets debugged.
        toRet.addAll(mproject.getTestCompileSourceRoots());
        //for poms also include all module projects recursively..
        boolean isPom = NbMavenProject.TYPE_POM.equals(watcher.getPackagingType());
        if (isPom) {
            //only for pom is correct use of subprojectprovider
            ProjectContainerProvider subs = prj.getLookup().lookup(ProjectContainerProvider.class);
            ProjectContainerProvider.Result res = subs.getContainedProjects();
            for (Project pr : res.getProjects()) {
                toRet.addAll(collectSourceRoots(pr));
            }
        }
        return toRet;
    }
    
    static ClassPath createSourcePath(Project project) {
        URL[] roots;
        ClassPath cp;
        AdditionalDebuggedProjects adds = project.getLookup().lookup(AdditionalDebuggedProjects.class);
        try {
            Set col = collectClasspaths(project);
            if (adds != null) {
                for (Project prj : adds.getProjects()) {
                    col.addAll(collectClasspaths(prj));
                }
            }
            col.remove(null); // MNG-5209
            roots = convertStringsToURL(col);
            cp = convertToSourcePath(roots);
        } catch (DependencyResolutionRequiredException ex) {
            ex.printStackTrace();
            cp = ClassPathSupport.createClassPath(new FileObject[0]);
        }
        Set col = collectSourceRoots(project);
        if (adds != null) {
            for (Project prj : adds.getProjects()) {
                col.addAll(collectSourceRoots(prj));
            }
        }
        roots = convertStringsToURL(col);
        ClassPath sp = ClassPathSupport.createClassPath(roots);
        
        ClassPath sourcePath = ClassPathSupport.createProxyClassPath(
                new ClassPath[] {cp, sp}
        );
        return sourcePath;
    }
    
    static ClassPath createJDKSourcePath(Project nbproject) {
        String val = nbproject.getLookup().lookup(AuxiliaryProperties.class).get(Constants.HINT_JDK_PLATFORM, true);
        JavaPlatform jp = BootClassPathImpl.getActivePlatform(val);
        if (jp == null) {
            jp = JavaPlatformManager.getDefault().getDefaultPlatform();
        }
        return jp.getSourceFolders();
    }
    
    /**
     * This method uses SourceForBinaryQuery to find sources for each
     * path item and returns them as ClassPath instance. All path items for which
     * the sources were not found are omitted.
     *
     */
    public static ClassPath convertToSourcePath(URL[] fs)  {
        List lst = new ArrayList();
        Set existingSrc = new HashSet();
        for (int i = 0; i < fs.length; i++) {
            URL url = FileUtil.isArchiveFile(fs[i]) ? FileUtil.getArchiveRoot(fs[i]) : fs[i];
            try {
                FileObject[] srcfos = SourceForBinaryQuery.findSourceRoots(url).getRoots();
                for (int j = 0; j < srcfos.length; j++) {
                    if (FileUtil.isArchiveFile(srcfos[j])) {
                        srcfos [j] = FileUtil.getArchiveRoot(srcfos [j]);
                    }
                    try {
                        url = srcfos[j].toURL();
                        if  (!url.toExternalForm().endsWith("/")) {
                            url = new URL(url.toExternalForm() + "/");
                        }
                    } catch (MalformedURLException ex) {
                        ErrorManager.getDefault().notify
                                (ErrorManager.EXCEPTION, ex);
                        continue;
                    }
                    if (url == null)  {
                        continue;
                    }
                    if (!existingSrc.contains(url)) {
                        lst.add(ClassPathSupport.createResource(url));
                        existingSrc.add(url);
                    }
                } // for
            } catch (IllegalArgumentException ex) {
                //TODO??
            }
        }
        return ClassPathSupport.createClassPath(lst);
    }
    
    
    
    static URL fileToURL(File file) {
        try {
            URL url;
            url = Utilities.toURI(file).toURL();
            if (FileUtil.isArchiveFile(url)) {
                url = FileUtil.getArchiveRoot(url);
            }
            if  (!url.toExternalForm().endsWith("/")) { //NOI18N
                url = new URL(url.toExternalForm() + "/"); //NOI18N
            }
            return url;
        } catch (MalformedURLException ex) {
            ErrorManager.getDefault().notify(ErrorManager.EXCEPTION, ex);
            return null;
        }
    }
    
}




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