litesoft
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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.util; import java.io.*; import org.litesoft.commonfoundation.base.*; import org.litesoft.commonfoundation.exceptions.*; import org.litesoft.commonfoundation.stringmatching.*; import org.litesoft.commonfoundation.typeutils.*; import java.util.*; import org.litesoft.commonfoundation.typeutils.Objects; public class FileUtils extends FileUtil { public static Reader[] filesToReaders( File pDir, String... pFileNames ) throws FileNotFoundException { if ( Objects.isNullOrEmpty( pFileNames ) ) { throw new IllegalArgumentException( "No Files provided" ); } Reader[] readers = new Reader[pFileNames.length]; for ( int i = 0; i < pFileNames.length; i++ ) { File file = new File( pDir, pFileNames[i] ); readers[i] = new InformativeFileReader( file ); } return readers; } private static class InformativeFileReader extends FileReader implements ToStringInformative { private File mFile; private InformativeFileReader( File pFile ) throws FileNotFoundException { super( pFile ); mFile = pFile; } @Override public String toString() { return mFile.getAbsolutePath(); } } public static void deleteIfExists( File pFile ) throws FileSystemException { Objects.assertNotNull( "File", pFile ); if ( pFile.isFile() ) { if ( !pFile.delete() || pFile.exists() ) { throw new FileSystemException( "Unable to delete: " + pFile.getAbsolutePath() ); } } } public static FilenameFilter createFileNameFilter( String... pParts ) { StringMatcher zSM = StringMatcherFactory.createStartsWith( pParts ); if ( zSM == null ) { throw new IllegalArgumentException( "Must Provide something to Filter on!" ); } return new StringMatcherFilenameFilter( zSM ); } @SuppressWarnings({"UnusedDeclaration"}) public static String locateFile( String pFile ) throws FileSystemException { try { File file = new File( pFile ); while ( !file.isFile() ) { File parent = file.getParentFile(); if ( parent != null ) { File grandparent = parent.getParentFile(); if ( grandparent != null ) { file = new File( grandparent, pFile ); continue; } } throw new FileNotFoundException( pFile ); } return file.getAbsolutePath(); } catch ( IOException e ) { throw new FileSystemException( e ); } } public static byte[] load( File pFile, int pMaxAllowedSize ) throws FileSystemException { Objects.assertNotNull( "File", pFile ); try { if ( !pFile.exists() ) { throw new FileNotFoundException( pFile.getAbsolutePath() ); } long fSize = pFile.length(); if ( fSize > pMaxAllowedSize ) { throw new FileSystemException( "File (" + pFile + ") Too large (" + fSize + "), but max set to: " + pMaxAllowedSize ); } int fileSize = (int) fSize; byte[] b = new byte[fileSize]; InputStream is = new FileInputStream( pFile ); boolean closed = false; try { int offset = 0; while ( offset < fileSize ) { int i = is.read( b, offset, fileSize - offset ); if ( i < 1 ) { throw new FileSystemException( "Unable to read the entire file (" + pFile + "). Expected " + fileSize + ", but only got: " + offset ); } offset += i; } if ( -1 != is.read() ) { throw new FileSystemException( "Read beyond file (" + pFile + ") size (" + fileSize + ")!" ); } closed = true; is.close(); } finally { if ( !closed ) { Utils.dispose( is ); } } return b; } catch ( IOException e ) { throw new FileSystemException( e ); } } public static void appendTextFile( File pFile, String... pLines ) throws FileSystemException { Objects.assertNotNull( "File", pFile ); File file = new File( pFile.getAbsolutePath() ); addLines( file, true, pLines ); } public static void store( File pFile, byte[] pBytes ) throws FileSystemException { Objects.assertNotNull( "File", pFile ); File file = Directories.insureParent( new File( pFile.getAbsolutePath() + ".new" ) ); try { OutputStream os = new FileOutputStream( file ); boolean closed = false; try { if ( (pBytes != null) && (pBytes.length != 0) ) { os.write( pBytes ); } closed = true; os.close(); } finally { if ( !closed ) { Utils.dispose( os ); } } } catch ( IOException e ) { throw new FileSystemException( e ); } rollIn( file, pFile, new File( pFile.getAbsolutePath() + ".bak" ) ); } public static void storeTextFile( File pFile, String... pLines ) throws FileSystemException { Objects.assertNotNull( "File", pFile ); File file = new File( pFile.getAbsolutePath() + ".new" ); addLines( file, false, pLines ); rollIn( file, pFile, new File( pFile.getAbsolutePath() + ".bak" ) ); } private static void addLines( File pFile, boolean pAppend, String... pLines ) throws FileSystemException { try { addLines( createWriter( pFile, pAppend ), pLines ); } catch ( IOException e ) { throw new FileSystemException( e ); } } private static void addLines( BufferedWriter pWriter, String... pLines ) throws IOException { boolean closed = false; try { for ( String line : Strings.deNull( pLines ) ) { if ( line != null ) { pWriter.write( line ); pWriter.write( '\n' ); } } closed = true; pWriter.close(); } finally { if ( !closed ) { Utils.dispose( pWriter ); } } } public static String[] loadTextFile( File pFile ) throws FileSystemException { Objects.assertNotNull( "File", pFile ); try { if ( !pFile.exists() ) { throw new FileNotFoundException( pFile.getAbsolutePath() ); } List<String> lines = new LinkedList<String>(); BufferedReader reader = createReader( pFile ); boolean closed = false; try { for ( String line; null != (line = reader.readLine()); ) { lines.add( line ); } closed = true; reader.close(); } finally { if ( !closed ) { Utils.dispose( reader ); } } return lines.toArray( new String[lines.size()] ); } catch ( IOException e ) { throw new FileSystemException( e ); } } @SuppressWarnings({"UnusedDeclaration"}) public static String loadTextFileAsString( File pFile ) throws FileSystemException { return loadTextFileAsString( pFile, null ); } public static String loadTextFileAsString( File pFile, String pLineSeparator ) throws FileSystemException { Objects.assertNotNull( "File", pFile ); pLineSeparator = Strings.deNull( pLineSeparator, "\n" ); try { if ( !pFile.exists() ) { throw new FileNotFoundException( pFile.getAbsolutePath() ); } StringBuilder buffer = new StringBuilder(); BufferedReader reader = createReader( pFile ); boolean closed = false; try { int count = 0; for ( String line; null != (line = reader.readLine()); count++ ) { if ( count > 0 ) { buffer.append( pLineSeparator ); } buffer.append( line ); } closed = true; reader.close(); } finally { if ( !closed ) { Utils.dispose( reader ); } } return buffer.toString(); } catch ( IOException e ) { throw new FileSystemException( e ); } } public static void rollIn( File pNewFile, File pTargetFile, File pBackupFile ) throws FileSystemException { Objects.assertNotNull( "NewFile", pNewFile ); Objects.assertNotNull( "TargetFile", pTargetFile ); Objects.assertNotNull( "BackupFile", pBackupFile ); if ( !pNewFile.exists() ) { throw new FileSystemException( "Does not Exist: " + pNewFile.getPath() ); } boolean targetExisted = false; if ( pTargetFile.exists() ) { targetExisted = true; deleteIfExists( pBackupFile ); renameFromTo( pTargetFile, pBackupFile ); } try { renameFromTo( pNewFile, pTargetFile ); } catch ( FileSystemException e ) { if ( targetExisted ) { attemptToRollBack( pNewFile, pTargetFile, pBackupFile ); } throw e; } } @SuppressWarnings({"ResultOfMethodCallIgnored"}) private static void attemptToRollBack( File pNewFile, File pTargetFile, File pBackupFile ) { switch ( (pNewFile.exists() ? 0 : 4) + (pTargetFile.exists() ? 0 : 2) + (pBackupFile.exists() ? 0 : 1) ) { // What Happen'd case 0: // There: ------------- Nobody -------------- case 2: // There: pTargetFile case 4: // There: pNewFile case 6: // There: pNewFile & pTargetFile case 7: // There: pNewFile & pTargetFile & pBackupFile return; case 3: // There: pTargetFile & pBackupFile pTargetFile.renameTo( pNewFile ); // Fall Thru case 1: // There: pBackupFile case 5: // There: pNewFile & pBackupFile pBackupFile.renameTo( pTargetFile ); break; } } /** * This method will rename the pSourceFile to the pDestinationFile name. * <p/> * It is Inherently fragile when dealing with multiple processes playing * in the same file system name spaces. It should therefore NOT be used * in a multi-process creation-consumption shared file system name space. * <p/> * Specifically there are two windows of opportunities for multiple processes * to mess with the "as linear" assumptions */ private static void renameFromTo( File pSourceFile, File pDestinationFile ) throws FileSystemException { Objects.assertNotNull( "SourceFile", pSourceFile ); Objects.assertNotNull( "DestinationFile", pDestinationFile ); // Win 1 Start if ( !pSourceFile.exists() ) { throw new FileSystemException( "SourceFile does not exist: " + pSourceFile.getAbsolutePath() ); } if ( pDestinationFile.exists() ) { throw new FileSystemException( "DestinationFile already exists: " + pDestinationFile.getAbsolutePath() ); } // Win 2 Start if ( !pSourceFile.renameTo( pDestinationFile ) ) // Win 1 End { throw renameFailed( pSourceFile, pDestinationFile, "Failed" ); } boolean sThere = pSourceFile.exists(); boolean dThere = pDestinationFile.exists(); // Win 2 End if ( sThere ) { throw renameFailed( pSourceFile, pDestinationFile, "claims Succeess, but Source still there" + (dThere ? " and so is the Destination!" : "!") ); } if ( !dThere ) { throw renameFailed( pSourceFile, pDestinationFile, "claims Succeess, but the Destination is NOT there!" ); } } private static FileSystemException renameFailed( File pSourceFile, File pDestinationFile, String pAdditionalExplanation ) { throw new FileSystemException( "Rename (" + pSourceFile.getAbsolutePath() + ") to (" + pDestinationFile.getAbsolutePath() + ") " + pAdditionalExplanation ); } private static class StringMatcherFilenameFilter implements FilenameFilter { private StringMatcher mSM; public StringMatcherFilenameFilter( StringMatcher pSM ) { mSM = pSM; } @Override public boolean accept( File dir, String name ) { return mSM.matches( name ); } } public static void main( String[] args ) throws Exception { File zFile = new File( "PersistanceTier/design/NextGEN.xml" ); String[] lines = loadTextFile( zFile ); process( lines ); storeTextFile( zFile, lines ); } private static void process( String[] pLines ) { for ( int i = 0; i < pLines.length; i++ ) { String zLine = pLines[i]; if ( zLine != null ) { if ( zLine.trim().startsWith( "<column " ) ) { processColumn( pLines, i, findEONode( pLines, i ) ); } else if ( zLine.trim().startsWith( "<foreignKey " ) ) { processForeignKey( pLines, i, findEONode( pLines, i ) ); } } } } private static int findEONode( String[] pLines, int pFromIndex ) { int zThruIndex = pFromIndex; while ( zThruIndex < pLines.length ) { String zLine = pLines[zThruIndex]; if ( (zLine != null) && zLine.trim().endsWith( ">" ) ) { break; } zThruIndex++; } return zThruIndex; } private static boolean isAttributeOneOf( String pLine, String... pOneOf ) { for ( String s : pOneOf ) { if ( pLine.startsWith( s + "=" ) ) { return true; } } return false; } private static void processColumn( String[] pLines, int pBegLine, int pEndLine ) { for ( int i = pBegLine + 1; i < pEndLine; i++ ) { String zLine = pLines[i]; if ( zLine != null ) { zLine = zLine.trim(); if ( zLine.equals( "type=\"foreignKey\"" ) ) // No More Columns as ForeignKeys { for ( int j = pBegLine; j <= pEndLine; j++ ) { pLines[j] = null; } return; } if ( isAttributeOneOf( zLine, "fkonly", "isContainer", "IsContainer", "ReferenceSortColumn", "ThemDependsOnUs", "UsDependsOnThem", "table", "updateReferencedPO" ) ) { pLines[i] = null; } } } } private static void processForeignKey( String[] pLines, int pBegLine, int pEndLine ) { for ( int i = pBegLine + 1; i < pEndLine; i++ ) { String zLine = pLines[i]; if ( zLine != null ) { zLine = zLine.trim(); if ( isAttributeOneOf( zLine, "fkonly", "isContainer", "IsContainer", "defaultValue", "enumeration", "len" ) ) { pLines[i] = null; } } } } } |
Commits for litesoft/trunk/Java/core/Server/src/org/litesoft/util/FileUtils.java
Revision | Author | Commited | Message |
---|---|---|---|
942 Diff | GeorgeS | Mon 02 Jun, 2014 23:41:46 +0000 | Extracting commonfoundation |
939 Diff | GeorgeS | Mon 02 Jun, 2014 21:30:31 +0000 | Extracting commonfoundation |
917 Diff | GeorgeS | Sun 08 Dec, 2013 20:49:56 +0000 | 1.7 prep & VersionedStaticContentFilter upgrade to new “/ver” model! |
823 Diff | GeorgeS | Sun 19 Aug, 2012 16:10:13 +0000 | |
809 Diff | GeorgeS | Thu 16 Aug, 2012 04:10:46 +0000 | |
804 Diff | GeorgeS | Wed 15 Aug, 2012 12:48:51 +0000 | |
802 Diff | GeorgeS | Wed 15 Aug, 2012 04:04:47 +0000 | |
76 Diff | GeorgeS | Wed 27 Oct, 2010 00:24:59 +0000 | |
73 Diff | GeorgeS | Mon 25 Oct, 2010 20:47:48 +0000 | |
72 | GeorgeS | Mon 25 Oct, 2010 19:13:46 +0000 |