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/*******************************************************************************
* Copyright (c) 2007 Symbian Software Limited and others.
* 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:
* Bala Torati (Symbian) - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.core.templateengine.process;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.RandomAccessFile;
import java.net.URL;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.eclipse.cdt.core.templateengine.TemplateEngineMessages;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
/**
* Acts as Helper class for process the processes i.e., copy, replace and append
* files.
*/
public class ProcessHelper {
public static final String CONDITION = "condition"; //$NON-NLS-1$
public static final String START_PATTERN = "$("; //$NON-NLS-1$
public static final String END_PATTERN = ")"; //$NON-NLS-1$
public static final String EQUALS = "=="; //$NON-NLS-1$
public static final String NOT_EQUALS = "!="; //$NON-NLS-1$
/**
* This method is to append the given contents into a file.
*
* @param fileContents,
* contents which are appended to the file.
* @param toFile,
* a file to append contents.
* @throws IOException,
* exception while writing contents into a file
*
* @since 4.0
*/
public static void appendFile(String fileContents, File toFile) throws IOException {
RandomAccessFile raf = null;
if (!toFile.exists()) {
throw new FileNotFoundException(" The specified destination file does not exists "); //$NON-NLS-1$
} else {
try {
raf = new RandomAccessFile(toFile, "rw"); //$NON-NLS-1$
raf.skipBytes((int) raf.length());
raf.writeBytes(fileContents);
} finally {
raf.close();
}
}
}
/**
* This method returns a vector of all replace marker strings. (e.g.,
* $(item), vector contains 'item' as one item. , ) is the end pattern.
*
* @param str,
* A given string may contains replace markers.
* @param pattern
* start pattern (e.g., $( is the start pattern)
* @param endPat
* end pattern (e.g., ) is the end pattern)
* @return a set of all replace marker strings.
*
* @since 4.0
*/
public static Set/*<String>*/ getReplaceKeys(String str) {
int start = 0;
int end = 0;
Set/*<String>*/ replaceStrings = new HashSet/*<String>*/();
while ((start = str.indexOf(START_PATTERN, start)) >= 0) {
end = str.indexOf(END_PATTERN, start);
if (end != -1) {
replaceStrings.add(str.substring(start + START_PATTERN.length(), end));
start = end + START_PATTERN.length();
} else
start++;
}
return replaceStrings;
}
/**
* This method takes a URL as parameter to read the contents, and to add
* into a string buffer.
*
* @param source
* URL to read the contents.
* @return string, contents of a file specified in the URL source path.
* @throws IOException
*
* @since 4.0
*/
public static String readFromFile(URL source) throws IOException {
char[] chars = new char[4092];
InputStreamReader contentsReader = null;
StringBuffer buffer = new StringBuffer();
if (!new java.io.File(source.getFile()).exists()) {
throw new FileNotFoundException(TemplateEngineMessages.getString("ProcessHelper.fileNotFound") + source.getFile()); //$NON-NLS-1$
} else {
contentsReader = new InputStreamReader(source.openStream());
int c;
do {
c = contentsReader.read(chars);
if (c == -1)
break;
buffer.append(chars, 0, c);
} while (c != -1);
contentsReader.close();
}
return buffer.toString();
}
/**
* This method reads contents from source, and writes the contents into
* destination file.
*
* @param source
* URL to read the contents.
* @param dest
* destination file to write the contents.
* @throws IOException
*
* @since 4.0
*/
public static void copyBinaryFile(URL source, File dest) throws IOException {
byte[] bytes = new byte[4092];
if (source != null && dest != null) {
File file = new File(source.getFile());
if (file.isFile()) {
FileInputStream fis = new FileInputStream(file);
FileOutputStream fos = new FileOutputStream(dest);
int ch;
while (true) {
ch = fis.read(bytes);
if (ch == -1) {
break;
}
fos.write(bytes, 0, ch);
}
}
}
}
/**
* This method Creates the Directories in the parent Folder.
* @param projectHandle
* @param parentFolder
* @throws CoreException
*
* @since 4.0
*/
public static void mkdirs(IProject projectHandle, IFolder parentFolder) throws CoreException {
if (parentFolder.getProjectRelativePath().equals(projectHandle.getProjectRelativePath())) {
return;
}
if (!parentFolder.getParent().exists()) {
mkdirs(projectHandle, projectHandle.getFolder(parentFolder.getParent().getProjectRelativePath()));
}
parentFolder.create(true, true, null);
}
/**
* Returns the Macro Value after Exanding the Macros.
* @param string
* @param macros
* @param valueStore
* @return
*
* @since 4.0
*/
public static String getValueAfterExpandingMacros(String string, Set/*<String>*/ macros, Map/*<String, String>*/ valueStore) {
for (Iterator i = macros.iterator(); i.hasNext();) {
String key = (String) i.next();
String value = (String) valueStore.get(key);
if (value != null) {
string = replace(START_PATTERN + key + END_PATTERN, value, string);
}
}
return string;
}
/**
* This is equivalent to Java 5.0 version of
* String.replace(CharSequence target, CharSequence replacement) method.
* @since 4.0
*/
private static String replace(String target, String replacement, String string) {
try {
StringBuffer stringBuffer = new StringBuffer(string);
int index = string.length();
int offset = target.length();
while ((index=string.lastIndexOf(target, index-1)) != -1) {
stringBuffer.replace(index, index+offset, replacement);
}
return stringBuffer.toString();
} catch (StringIndexOutOfBoundsException e) {
return string;
}
}
/**
* Consturct and Return the Replacment Markers
* after adding the patterns to the macro.
* @param macro
* @return
*
* @since 4.0
*/
public static String getReplaceMarker(String macro) {
return START_PATTERN + macro + END_PATTERN;
}
}
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