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package org.bndtools.builder.classpath;

import java.io.File;
import java.io.IOException;
import java.io.PrintStream;

import org.bndtools.api.BndtoolsConstants;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.ui.wizards.IClasspathContainerPage;
import org.eclipse.jdt.ui.wizards.IClasspathContainerPageExtension;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;

import aQute.bnd.build.Container;
import aQute.bnd.build.Project;
import aQute.lib.io.IO;
import bndtools.central.Central;

public class BndContainerPage extends WizardPage implements IClasspathContainerPage, IClasspathContainerPageExtension {

    // private Activator activator = Activator.getActivator();

    private Table table;
    private Project model;
    private File basedir;
    private IJavaProject javaProject;

    /**
     * Default Constructor - sets title, page name, description
     */
    public BndContainerPage() {
        super("bnd", "bnd - classpath", null);
        setDescription("Ensures that bnd sees the same classpath as eclipse. The table will show the current contents. If there is no bnd file, you can create it with the button");
        setPageComplete(true);
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jdt.ui.wizards.IClasspathContainerPageExtension#initialize (org.eclipse.jdt.core.IJavaProject,
     * org.eclipse.jdt.core.IClasspathEntry[])
     */
    @Override
    public void initialize(IJavaProject project, IClasspathEntry[] currentEntries) {
        javaProject = project;
        model = Central.getInstance()
            .getModel(project);
        basedir = project.getProject()
            .getLocation()
            .makeAbsolute()
            .toFile();
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets .Composite)
     */
    @Override
    public void createControl(Composite parent) {
        Composite composite = new Composite(parent, SWT.NULL);
        composite.setLayout(new FormLayout());
        composite.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL));
        composite.setFont(parent.getFont());

        setControl(composite);

        final Button wCreate = new Button(composite, SWT.NONE);
        wCreate.setEnabled(model == null);
        final FormData fd_wCreate = new FormData();
        fd_wCreate.bottom = new FormAttachment(100, -5);
        fd_wCreate.right = new FormAttachment(100, -4);
        wCreate.setLayoutData(fd_wCreate);
        wCreate.setText("Create bnd.bnd");

        final TableViewer tableViewer = new TableViewer(composite, SWT.BORDER);
        table = tableViewer.getTable();
        final FormData fd_table = new FormData();
        fd_table.top = new FormAttachment(0, 3);
        fd_table.left = new FormAttachment(0, 3);
        fd_table.right = new FormAttachment(100, -4);
        fd_table.bottom = new FormAttachment(100, -37);
        table.setLayoutData(fd_table);
        table.setLinesVisible(true);
        table.setHeaderVisible(true);

        final TableColumn wBsn = new TableColumn(table, SWT.NONE);
        wBsn.setWidth(200);
        wBsn.setText("Bundle Symbolic Name");

        final TableColumn wVersion = new TableColumn(table, SWT.NONE);
        wVersion.setWidth(100);
        wVersion.setText("Version");

        final TableColumn wOptions = new TableColumn(table, SWT.NONE);
        wOptions.setWidth(200);
        wOptions.setText("Options");

        final TableColumn wFile = new TableColumn(table, SWT.NONE);
        wFile.setWidth(100);
        wFile.setText("File");

        tableViewer.setContentProvider(new IStructuredContentProvider() {

            @Override
            public Object[] getElements(Object inputElement) {
                if (model != null)
                    try {

                        return model.getBuildpath()
                            .toArray();
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                return new Object[0];

            }

            @Override
            public void dispose() {
                // TODO Auto-generated method stub

            }

            @Override
            public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

            }

        });
        tableViewer.setLabelProvider(new ITableLabelProvider() {

            @Override
            public Image getColumnImage(Object element, int columnIndex) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public String getColumnText(Object element, int columnIndex) {
                Container c = (Container) element;
                switch (columnIndex) {
                    case 0 :
                        return c.getBundleSymbolicName();
                    case 1 :
                        return c.getVersion();
                    case 2 :
                        return c.getError();
                    case 3 :
                        return c.getFile() + " (" + (c.getFile() != null && c.getFile()
                            .exists() ? "exists" : "?") + ")";
                    default :
                        break;
                }
                return null;
            }

            @Override
            public void addListener(ILabelProviderListener listener) {
                // TODO Auto-generated method stub

            }

            @Override
            public void dispose() {
                // TODO Auto-generated method stub

            }

            @Override
            public boolean isLabelProperty(Object element, String property) {
                // TODO Auto-generated method stub
                return false;
            }

            @Override
            public void removeListener(ILabelProviderListener listener) {
                // TODO Auto-generated method stub

            }

        });
        tableViewer.setInput(model);
        wCreate.addSelectionListener(new SelectionListener() {

            @Override
            public void widgetDefaultSelected(SelectionEvent e) {
                System.out.println("defw selected");
            }

            @Override
            public void widgetSelected(SelectionEvent e) {
                wCreate.setEnabled(!createBnd());
                tableViewer.setInput(model);
            }

        });
    }

    protected boolean createBnd() {
        if (basedir != null && basedir.isDirectory()) {
            File bnd = new File(basedir, "bnd.bnd");
            try {
                try (PrintStream ps = new PrintStream(IO.outputStream(bnd), false, "UTF-8")) {
                    ps.println("# Auto generated by bnd, please adapt");
                    ps.println();
                    ps.println("Export-Package:                    ");
                    ps.println("Private-Package:                   ");
                    ps.println("Bundle-Name:                       ${Bundle-SymbolicName}");
                    ps.println("Bundle-Version:                    1.0");
                    ps.println();
                    ps.println("#Example buildpath");
                    ps.println("-buildpath:                        osgi;                                        version=4.0, \\");
                    ps.println("                                   com.springsource.junit;                      version=\"[3.8,4)\"");
                }
                javaProject.getResource()
                    .refreshLocal(IResource.DEPTH_ONE, null);
                model = Central.getInstance()
                    .getModel(javaProject);
                return model != null;
            } catch (IOException e) {
                e.printStackTrace();
            } catch (CoreException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return false;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jdt.ui.wizards.IClasspathContainerPage#finish()
     */
    @Override
    public boolean finish() {
        return true;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jdt.ui.wizards.IClasspathContainerPage#getSelection()
     */
    @Override
    public IClasspathEntry getSelection() {
        IPath containerPath = BndtoolsConstants.BND_CLASSPATH_ID;
        IClasspathEntry cpe = JavaCore.newContainerEntry(containerPath);
        return cpe;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jdt.ui.wizards.IClasspathContainerPage#setSelection(org.eclipse .jdt.core.IClasspathEntry)
     */
    @Override
    public void setSelection(IClasspathEntry containerEntry) {
        if (containerEntry != null) {
            // initPath = containerEntry.getPath();
        }
    }
}




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