juzu.impl.compiler.file.JavaFileObjectImpl Maven / Gradle / Ivy
/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.impl.compiler.file;
import juzu.impl.common.FileKey;
import juzu.impl.common.Resource;
import juzu.impl.common.Timestamped;
import juzu.impl.fs.spi.ReadFileSystem;
import juzu.impl.fs.spi.ReadWriteFileSystem;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.NestingKind;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.net.URI;
import java.net.URISyntaxException;
/** @author Julien Viet */
public class JavaFileObjectImpl implements JavaFileObject {
/***/
final FileKey key;
/** . */
final ReadFileSystem
fs;
/** The file. */
private final P file;
/** . */
Timestamped content;
/** . */
private boolean writing;
/** . */
final URI uri;
public JavaFileObjectImpl(JavaFileManager.Location location, FileKey key, ReadFileSystem fs, P file) throws NullPointerException, IOException {
//
if (key == null) {
throw new NullPointerException("No null key accepted");
}
if (file == null) {
throw new NullPointerException("No null file accepted for " + key);
}
//
URI uri;
try {
uri = fs.getURL(file).toURI();
}
catch (URISyntaxException e) {
throw new IOException("Could not create uri for file " + file, e);
}
//
this.key = key;
this.fs = fs;
this.file = file;
this.writing = false;
this.uri = uri;
}
public FileKey getKey() {
return key;
}
private Timestamped assertContent() throws IOException {
if (writing) {
throw new IllegalStateException("Opened for writing");
} else {
if (content == null) {
content = fs.getResource(file);
if (content == null) {
throw new FileNotFoundException("File " + key + " cannot be found");
}
}
return content;
}
}
public File getFile() throws IOException {
return fs.getFile(file);
}
public boolean isNameCompatible(String simpleName, Kind kind) {
String baseName = simpleName + kind.extension;
return kind.equals(getKind()) && (baseName.equals(toUri().getPath()) || toUri().getPath().endsWith("/" + baseName));
}
public Kind getKind() {
return key.getKind();
}
public NestingKind getNestingKind() {
return null;
}
public Modifier getAccessLevel() {
return null;
}
public URI toUri() {
return uri;
}
public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
CharSequence charContent = getCharContent(ignoreEncodingErrors);
if (charContent == null) {
throw new IOException("No content");
}
return new StringReader(charContent.toString());
}
public boolean delete() {
if (fs instanceof ReadWriteFileSystem) {
try {
return ((ReadWriteFileSystem)fs).removePath(file);
}
catch (IOException ignore) {
return false;
}
} else {
return false;
}
}
public String getName() {
File f = fs.getFile(file);
if (f != null) {
try {
return f.getCanonicalPath();
}
catch (IOException ignore) {
}
}
return key.rawName;
}
/**
* We subclass this in order to have the correct name in the stack trace. This is not really documented anywhere.
*
* @return the file name
*/
@Override
public String toString() {
return key.rawName;
}
public long getLastModified() {
try {
return assertContent().getTime();
}
catch (IOException e) {
// We return 0 as the javadoc say to do
return 0;
}
}
public final CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
return assertContent().getObject().getCharSequence();
}
public final InputStream openInputStream() throws IOException {
return assertContent().getObject().getInputStream();
}
public OutputStream openOutputStream() throws IOException {
if (writing) {
throw new IllegalStateException("Opened for writing");
}
if (fs instanceof ReadWriteFileSystem) {
final ReadWriteFileSystem
fs = (ReadWriteFileSystem
)this.fs;
return new ByteArrayOutputStream() {
@Override
public void close() throws IOException {
Resource content = new Resource(toByteArray(), null);
long lastModified = fs.updateResource(file, content);
JavaFileObjectImpl.this.content = new Timestamped(lastModified, content);
JavaFileObjectImpl.this.writing = false;
}
};
}
else {
throw new UnsupportedOperationException("Read only");
}
}
public Writer openWriter() throws IOException {
if (writing) {
throw new IllegalStateException("Opened for writing");
}
if (fs instanceof ReadWriteFileSystem) {
final ReadWriteFileSystem fs = (ReadWriteFileSystem
)this.fs;
return new StringWriter() {
@Override
public void close() throws IOException {
Resource content = new Resource(getBuffer());
long lastModified = fs.updateResource(file, content);
JavaFileObjectImpl.this.content = new Timestamped(lastModified, content);
JavaFileObjectImpl.this.writing = false;
}
};
}
else {
throw new UnsupportedOperationException("Read only");
}
}
}