Examples of org.eclipse.core.runtime.content.IContentDescription

Package org.eclipse.core.runtime.content

Examples of org.eclipse.core.runtime.content.IContentDescription

org.eclipse.core.runtime.content.IContentDescription
A content description object contains information about the nature of arbitrary data.
A content description object will always include the content type for the examined contents, and may also include information on:
1. charset;
2. byte order mark;
3. other custom properties provided by third-party plug-ins.
Content describers provided by plug-ins will fill in most of the properties in a content description object, except for the content type, what is done by the platform. After a content description is filled in by a content interpreter, it is marked as immutable by the platform, so calling any of the mutator methods defined in this interface will cause an IllegalStateException to be thrown.

Default values for properties can be contributed by plug-ins as part of the content type definition markup.

This interface is not intended to be implemented by clients.
@see IContentDescriber @since 3.0

        }        
      }
      
      // all other textual resources should be validated
      try {
        IContentDescription desc = file.getContentDescription();
        if (desc != null) {        
          IContentType type = desc.getContentType();
          if (type != null && desc.getContentType().isKindOf(Platform.getContentTypeManager().getContentType("org.eclipse.core.runtime.text"))) {
            return true;
          }
        }
      } catch (CoreException e) {
      }

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      : stringContents.getBytes(encoding);


    // Special case for UTF-8 BOM files
    // see bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=110576
    if (encoding != null && encoding.equals(org.aspectj.org.eclipse.jdt.internal.compiler.util.Util.UTF_8)) {
      IContentDescription description = this.file.getContentDescription();
      if (description != null && description.getProperty(IContentDescription.BYTE_ORDER_MARK) != null) {
        int bomLength= IContentDescription.BOM_UTF_8.length;
        byte[] bytesWithBOM= new byte[bytes.length + bomLength];
        System.arraycopy(IContentDescription.BOM_UTF_8, 0, bytesWithBOM, 0, bomLength);
        System.arraycopy(bytes, 0, bytesWithBOM, bomLength, bytes.length);
        bytes= bytesWithBOM;

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            IFile f = project.getProject().getFile(p.getLocalFile());
            if (f.exists())
            {
                try
                {
                    IContentDescription desc = f.getContentDescription();
                    if (desc != null)
                    {
                        IContentType type = desc.getContentType();
                        if (type != null)
                        {
                            if (type.isKindOf(txt))
                            {
                                parseText(f, imports);

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    init(file);
  }


  private void init(IFile file) {
    try {
      IContentDescription desc = file.getContentDescription();
      if (desc != null) {
        componentType = (String) desc
            .getProperty(NonameContentType.COMPONENT_TYPE);
      }
    } catch (CoreException e) {
      e.printStackTrace();
    }

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   *       - byte order mark is not valid for UTF-8
   */
  private static boolean isUTF8BOM(String encoding, IStorage storage) throws CoreException {
    if (storage instanceof IFile && "UTF-8".equals(encoding)) { //$NON-NLS-1$
      IFile file= (IFile) storage;
      IContentDescription description= file.getContentDescription();
      if (description != null) {
        byte[] bom= (byte[]) description.getProperty(IContentDescription.BYTE_ORDER_MARK);
        if (bom != null) {
          if (bom != IContentDescription.BOM_UTF_8)
            throw new CoreException(new Status(IStatus.ERROR, EditorsUI.PLUGIN_ID, IStatus.OK, QuickDiffMessages.getString("LastSaveReferenceProvider.LastSaveReferenceProvider.error.wrongByteOrderMark"), null)); //$NON-NLS-1$
          return true;
        }

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    if (element instanceof IStorageEditorInput) {
      IStorage storage= ((IStorageEditorInput) element).getStorage();
      Reader reader= null;
      InputStream stream= null;
      try {
        IContentDescription desc;
        IDocument document= getDocument(element);
        if (document != null) {
          reader= new DocumentReader(document);
          desc= Platform.getContentTypeManager().getDescriptionFor(reader, storage.getName(), NO_PROPERTIES);
        } else {
          stream= storage.getContents();
          desc= Platform.getContentTypeManager().getDescriptionFor(stream, storage.getName(), NO_PROPERTIES);
        }
        if (desc != null && desc.getContentType() != null)
          return desc.getContentType();
      } catch (IOException x) {
        IPath path= storage.getFullPath();
        String name;
        if (path != null)
          name= path.toOSString();

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    // Probe content
    Reader reader= new DocumentReader(document);
    try {
      QualifiedName[] options= new QualifiedName[] { IContentDescription.CHARSET, IContentDescription.BYTE_ORDER_MARK };
      IContentDescription description= Platform.getContentTypeManager().getDescriptionFor(reader, targetFile.getName(), options);
      if (description != null) {
        encoding= description.getCharset();
        if (encoding != null)
          return encoding;
      }
    } catch (IOException ex) {
      // continue with next strategy

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   * @throws CoreException if reading or accessing the underlying store
   *                 fails
   * @since 3.1
   */
  private IContentType getContentType(IFileEditorInput input) throws CoreException {
    IContentDescription desc= input.getFile().getContentDescription();
    if (desc != null)
      return desc.getContentType();
    return null;
  }

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  private boolean hasBOM(Object element) {
    if (element instanceof IFileEditorInput) {
      IFile file= ((IFileEditorInput)element).getFile();
      if (file != null) {
        try {
          IContentDescription description= file.getContentDescription();
          return  description != null && description.getProperty(IContentDescription.BYTE_ORDER_MARK) != null;
        } catch (CoreException ex) {
          return false;
        }
      }
    }

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  /*
   * @since 3.0
   */
  private static String getEncodingFromContent(IFile file) throws CoreException {
    IContentDescription description = file.getContentDescription();
    if (description != null) {
      byte[] bom= (byte[])description.getProperty(IContentDescription.BYTE_ORDER_MARK);
      if (bom == null)
        return (String)description.getProperty(IContentDescription.CHARSET);
      if (bom == IContentDescription.BOM_UTF_8)
        return TextEditorMessages.WorkbenchPreference_encoding_BOM_UTF_8;
      if (bom == IContentDescription.BOM_UTF_16BE)
        return TextEditorMessages.WorkbenchPreference_encoding_BOM_UTF_16BE;
      if (bom == IContentDescription.BOM_UTF_16LE)

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