/**
* Copyright 2011-2017 Asakusa Framework Team.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.asakusafw.utils.java.jsr199.testing;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import javax.tools.FileObject;
/**
* A {@link FileObject} implementation which is stored on the heap.
*/
public class VolatileResourceFile implements FileObject {
/**
* The schema name of this kind of resources.
*/
public static final String URI_SCHEME = VolatileResourceFile.class.getName();
private static final Charset CHARSET = StandardCharsets.UTF_8;
private final URI uri;
volatile byte[] contents;
volatile long lastModified;
/**
* Creates a new instance.
* @param path the relative path from the source path
* @throws IllegalArgumentException if the parameter is {@code null}
*/
public VolatileResourceFile(String path) {
this.uri = toUriFromPath(path);
}
@Override
public URI toUri() {
return uri;
}
@Override
public String getName() {
String path = uri.getPath();
return path.substring(path.lastIndexOf('/') + 1);
}
@Override
public InputStream openInputStream() throws IOException {
if (contents == null) {
throw new IOException();
}
return new ByteArrayInputStream(contents);
}
@Override
public OutputStream openOutputStream() throws IOException {
return new ByteArrayOutputStream() {
@Override
public void close() throws IOException {
super.close();
contents = toByteArray();
lastModified = System.currentTimeMillis();
}
};
}
@Override
public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
return new InputStreamReader(openInputStream(), CHARSET);
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
return new String(contents, CHARSET);
}
@Override
public Writer openWriter() throws IOException {
return new OutputStreamWriter(openOutputStream(), CHARSET);
}
@Override
public long getLastModified() {
if (contents == null) {
return 0L;
}
return lastModified;
}
@Override
public boolean delete() {
if (contents == null) {
return false;
}
contents = null;
return true;
}
private static URI toUriFromPath(String path) {
if (path == null) {
throw new IllegalArgumentException("path must not be null"); //$NON-NLS-1$
}
try {
return new URI(
URI_SCHEME,
null,
"/" + path.replace('\\', '/'), //$NON-NLS-1$
null);
} catch (URISyntaxException e) {
throw new IllegalArgumentException(e);
}
}
}