FileUtils.java

/* 
  Copyright (C) 2013 Raquel Pau and Albert Coroleu.
 
 Walkmod is free software: you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
 Walkmod is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public License
 along with Walkmod.  If not, see <http://www.gnu.org/licenses/>.*/
package org.walkmod.javalang.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;

import org.walkmod.javalang.JavaParser;
import org.walkmod.javalang.ParseException;
import org.walkmod.javalang.ast.CompilationUnit;
import org.walkmod.javalang.ast.PackageDeclaration;
import org.walkmod.javalang.ast.body.TypeDeclaration;

public class FileUtils {

	public static CompilationUnit getCompilationUnit(File outputDirectory,
			PackageDeclaration pd, TypeDeclaration td) throws ParseException,
			IOException {
		File sourceFile = getSourceFile(outputDirectory, pd, td);
		if (sourceFile.exists()) {
			return JavaParser.parse(sourceFile);
		} else {
			CompilationUnit result = new CompilationUnit();
			result.setPackage(pd);
			return result;
		}
	}

	public static File getSourceFile(File outputDirectory,
			PackageDeclaration pd, TypeDeclaration td) {
		String pdName = ".";
		if (pd != null) {
			pdName = pd.getName().toString().replace('.', '/');
		}
		return new File(outputDirectory, pdName + "//" + td.getName() + ".java");
	}

	public static File getSourceFile(File outputDirectory,
			PackageDeclaration pd, String clazzName) {
		String pdName = ".";
		if (pd != null) {
			pdName = pd.getName().toString().replace('.', '/');
		}
		return new File(outputDirectory, pdName + "//" + clazzName + ".java");
	}

	public static String normalizeName(String name) {
		return name.replaceAll("::", ".");
	}

	public static String resolveFile(String qualifiedName) {
		return qualifiedName.replaceAll("::", "/");
	}

	public static void createSourceFile(File parent, File source)
			throws Exception {
		File owner = source.getParentFile();
		if (!owner.exists()) {
			owner.mkdirs();
		}
		source.createNewFile();
	}

	public static List<String> fileToLines(String filename) throws Exception {
		List<String> lines = new LinkedList<String>();
		String line = "";
		BufferedReader in = new BufferedReader(new FileReader(filename));
		try {
			while ((line = in.readLine()) != null) {
				lines.add(line);
			}
		} finally {
			in.close();
		}
		return lines;
	}

	public static String fileToString(String fileName) throws Exception {
		StringBuffer result = new StringBuffer();
		BufferedReader in = new BufferedReader(new FileReader(fileName));
		char[] buffer = new char[1000];
		int readedChars = 0;
		try {
			while ((readedChars = in.read(buffer)) > 0) {
				result.append(buffer, 0, readedChars);

			}
		} finally {
			in.close();
		}
		return result.toString();
	}
}