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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) 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.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser 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.
*/
package com.github.javaparser;
import java.io.*;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import static com.github.javaparser.utils.Utils.assertNotNull;
/**
* Factory for providers of source code for JavaParser. Providers that have no parameter for encoding but need it will
* use UTF-8.
*/
public final class Providers {
public static final Charset UTF8 = Charset.forName("utf-8");
private Providers() {
}
public static Provider provider(Reader reader) {
return new StreamProvider(assertNotNull(reader));
}
public static Provider provider(InputStream input, Charset encoding) {
assertNotNull(input);
assertNotNull(encoding);
try {
return new StreamProvider(input, encoding.name());
} catch (IOException e) {
// The only one that is thrown is UnsupportedCharacterEncodingException,
// and that's a fundamental problem, so runtime exception.
throw new RuntimeException(e);
}
}
public static Provider provider(InputStream input) {
return provider(input, UTF8);
}
public static Provider provider(File file, Charset encoding) throws FileNotFoundException {
return provider(new FileInputStream(assertNotNull(file)), assertNotNull(encoding));
}
public static Provider provider(File file) throws FileNotFoundException {
return provider(assertNotNull(file), UTF8);
}
public static Provider provider(Path path, Charset encoding) throws IOException {
return provider(Files.newInputStream(assertNotNull(path)), assertNotNull(encoding));
}
public static Provider provider(Path path) throws IOException {
return provider(assertNotNull(path), UTF8);
}
public static Provider provider(String source) {
return new StringProvider(assertNotNull(source));
}
/**
* Provide a Provider from the resource found in class loader with the provided encoding.<br/> As resource is
* accessed through a class loader, a leading "/" is not allowed in pathToResource
*/
public static Provider resourceProvider(ClassLoader classLoader, String pathToResource, Charset encoding) throws IOException {
InputStream resourceAsStream = classLoader.getResourceAsStream(pathToResource);
if (resourceAsStream == null) {
throw new IOException("Cannot find " + pathToResource);
}
return provider(resourceAsStream, encoding);
}
/**
* Provide a Provider from the resource found in the current class loader with the provided encoding.<br/> As
* resource is accessed through a class loader, a leading "/" is not allowed in pathToResource
*/
public static Provider resourceProvider(String pathToResource, Charset encoding) throws IOException {
ClassLoader classLoader = Provider.class.getClassLoader();
return resourceProvider(classLoader, pathToResource, encoding);
}
/**
* Provide a Provider from the resource found in the current class loader with UTF-8 encoding.<br/> As resource is
* accessed through a class loader, a leading "/" is not allowed in pathToResource
*/
public static Provider resourceProvider(String pathToResource) throws IOException {
return resourceProvider(pathToResource, UTF8);
}
}
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