| /******************************************************************************* |
| * Copyright (c) 2005, 2007 BEA Systems, Inc. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * mkaufman@bea.com - initial API and implementation |
| * |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.apt.core.internal.util; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.jdt.apt.core.internal.AptPlugin; |
| import org.eclipse.jdt.apt.core.internal.env.BuildEnv; |
| import org.eclipse.jdt.core.IBuffer; |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.JavaCore; |
| import org.eclipse.jdt.core.JavaModelException; |
| import org.eclipse.jdt.core.ToolFactory; |
| import org.eclipse.jdt.core.compiler.IScanner; |
| import org.eclipse.jdt.core.compiler.ITerminalSymbols; |
| import org.eclipse.jdt.core.compiler.InvalidInputException; |
| |
| public class ScannerUtil { |
| |
| /** |
| * scan the source code to see if there are any annotation tokens |
| */ |
| public static boolean hasAnnotationInstance( IFile f ) { |
| |
| InputStreamReader reader = null; |
| InputStream input = null; |
| try { |
| AnnotationScanner scanner; |
| // If this is a single byte encoding, we can deal directly |
| // with the bytes, which is *much* faster |
| if (SINGLE_BYTE_ENCODINGS.contains(f.getCharset())) { |
| input = BuildEnv.getInputStream(f); |
| scanner = new InputStreamAnnotationScanner(input); |
| } |
| else { |
| reader = BuildEnv.getFileReader( f ); |
| scanner = new ReaderAnnotationScanner(reader); |
| } |
| return scanner.containsAnnotations(); |
| } |
| catch( Exception ioe ) { |
| return false; |
| } |
| finally { |
| if (reader != null) { try {reader.close();} catch (IOException ioe) {} } |
| if (input != null) { try {input.close();} catch (IOException ioe) {} } |
| } |
| } |
| |
| |
| public static boolean hasAnnotationInstance( ICompilationUnit cu ) { |
| try { |
| IBuffer b = cu.getBuffer(); |
| if ( b == null ) |
| return false; |
| char[] source = b.getCharacters(); |
| return hasAnnotationInstance( source ); |
| } |
| catch( JavaModelException jme ) { |
| return false; |
| } |
| } |
| |
| |
| public static boolean hasAnnotationInstance( char[] source ) { |
| try { |
| if ( source == null ) |
| return false; |
| IScanner scanner = ToolFactory.createScanner( |
| false, false, false, JavaCore.VERSION_1_5 ); |
| scanner.setSource( source ); |
| int token = scanner.getNextToken(); |
| while ( token != ITerminalSymbols.TokenNameEOF ) { |
| token = scanner.getNextToken(); |
| if ( token == ITerminalSymbols.TokenNameAT ) |
| { |
| // |
| // found an @ sign, see if next token is "interface" |
| // @interface is an annotation decl and not an annotation |
| // instance. |
| // |
| token = scanner.getNextToken(); |
| if ( token != ITerminalSymbols.TokenNameinterface ) |
| return true; |
| } |
| } |
| return false; |
| } |
| catch( InvalidInputException iie ) |
| { |
| // lex error, so report false |
| return false; |
| } |
| catch( Exception e ) |
| { |
| AptPlugin.log(e, "Failure scanning source: \n" + new String(source)); //$NON-NLS-1$ |
| // TODO: deal with this exception |
| return false; |
| } |
| } |
| |
| private static final String[] SINGLE_BYTE_ENCODING_ARRAY = { |
| "ASCII", //$NON-NLS-1$ |
| "Cp1250", //$NON-NLS-1$ |
| "Cp1251", //$NON-NLS-1$ |
| "Cp1252", //$NON-NLS-1$ |
| "Cp1253", //$NON-NLS-1$ |
| "Cp1254", //$NON-NLS-1$ |
| "Cp1257", //$NON-NLS-1$ |
| "ISO8859_1", //$NON-NLS-1$ |
| "ISO8859_2", //$NON-NLS-1$ |
| "ISO8859_4", //$NON-NLS-1$ |
| "ISO8859_5", //$NON-NLS-1$ |
| "ISO8859_7", //$NON-NLS-1$ |
| "ISO8859_9", //$NON-NLS-1$ |
| "ISO8859_13", //$NON-NLS-1$ |
| "ISO8859_15", //$NON-NLS-1$ |
| "UTF8" //$NON-NLS-1$ |
| }; |
| |
| private static final Set<String> SINGLE_BYTE_ENCODINGS = |
| new HashSet<String>(SINGLE_BYTE_ENCODING_ARRAY.length); |
| |
| static { |
| for (String encoding : SINGLE_BYTE_ENCODING_ARRAY) { |
| SINGLE_BYTE_ENCODINGS.add(encoding); |
| } |
| } |
| |
| } |