org.eclipse.jdt.internal.compiler.tool.EclipseFileObject Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of ecj Show documentation
Show all versions of ecj Show documentation
Eclipse Compiler for Java(TM)
/*******************************************************************************
* Copyright (c) 2006, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Walter Harley - Patch for ensuring the parent folders are created
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.tool;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
import java.nio.charset.Charset;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.NestingKind;
import javax.tools.SimpleJavaFileObject;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
import org.eclipse.jdt.internal.compiler.util.JRTUtil;
/**
* Implementation of a Java file object that corresponds to a file on the file system
*/
public class EclipseFileObject extends SimpleJavaFileObject {
File f;
private Charset charset;
private boolean parentsExist; // parent directories exist
public EclipseFileObject(String className, URI uri, Kind kind, Charset charset) {
super(uri, kind);
this.f = new File(this.uri);
this.charset = charset;
this.parentsExist = false;
}
/* (non-Javadoc)
* @see javax.tools.JavaFileObject#getAccessLevel()
*/
@Override
public Modifier getAccessLevel() {
// cannot express multiple modifier
if (getKind() != Kind.CLASS) {
return null;
}
ClassFileReader reader = null;
try {
reader = ClassFileReader.read(this.f);
} catch (ClassFormatException e) {
// ignore
} catch (IOException e) {
String error = "Failed to read access level from " + this.f; //$NON-NLS-1$
if (JRTUtil.PROPAGATE_IO_ERRORS) {
throw new IllegalStateException(error, e);
} else {
System.err.println(error);
e.printStackTrace();
}
}
if (reader == null) {
return null;
}
final int accessFlags = reader.accessFlags();
if ((accessFlags & ClassFileConstants.AccPublic) != 0) {
return Modifier.PUBLIC;
}
if ((accessFlags & ClassFileConstants.AccAbstract) != 0) {
return Modifier.ABSTRACT;
}
if ((accessFlags & ClassFileConstants.AccFinal) != 0) {
return Modifier.FINAL;
}
return null;
}
/* (non-Javadoc)
* @see javax.tools.JavaFileObject#getNestingKind()
*/
@Override
public NestingKind getNestingKind() {
switch(this.kind) {
case SOURCE :
return NestingKind.TOP_LEVEL;
case CLASS :
ClassFileReader reader = null;
try {
reader = ClassFileReader.read(this.f);
} catch (ClassFormatException e) {
// ignore
} catch (IOException e) {
String error = "Failed to read access nesting kind from " + this.f; //$NON-NLS-1$
if (JRTUtil.PROPAGATE_IO_ERRORS) {
throw new IllegalStateException(error, e);
} else {
System.err.println(error);
e.printStackTrace();
}
}
if (reader == null) {
return null;
}
if (reader.isAnonymous()) {
return NestingKind.ANONYMOUS;
}
if (reader.isLocal()) {
return NestingKind.LOCAL;
}
if (reader.isMember()) {
return NestingKind.MEMBER;
}
return NestingKind.TOP_LEVEL;
default:
return null;
}
}
/**
* @see javax.tools.FileObject#delete()
*/
@Override
public boolean delete() {
return this.f.delete();
}
@Override
public boolean equals(Object o) {
if (!(o instanceof EclipseFileObject)) {
return false;
}
EclipseFileObject eclipseFileObject = (EclipseFileObject) o;
return eclipseFileObject.toUri().equals(this.uri);
}
/**
* @see javax.tools.FileObject#getCharContent(boolean)
*/
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
return Util.getCharContents(this, ignoreEncodingErrors, org.eclipse.jdt.internal.compiler.util.Util.getFileByteContent(this.f), this.charset.name());
}
/**
* @see javax.tools.FileObject#getLastModified()
*/
@Override
public long getLastModified() {
return this.f.lastModified();
}
@Override
public String getName() {
return this.f.getPath();
}
@Override
public int hashCode() {
return this.f.hashCode();
}
/**
* @see javax.tools.FileObject#openInputStream()
*/
@Override
public InputStream openInputStream() throws IOException {
return new BufferedInputStream(new FileInputStream(this.f));
}
/**
* @see javax.tools.FileObject#openOutputStream()
*/
@Override
public OutputStream openOutputStream() throws IOException {
ensureParentDirectoriesExist();
return new BufferedOutputStream(new FileOutputStream(this.f));
}
/**
* @see javax.tools.FileObject#openReader(boolean)
*/
@Override
public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
return new BufferedReader(new FileReader(this.f));
}
/**
* @see javax.tools.FileObject#openWriter()
*/
@Override
public Writer openWriter() throws IOException {
ensureParentDirectoriesExist();
return new BufferedWriter(new FileWriter(this.f));
}
@Override
public String toString() {
return this.f.getAbsolutePath();
}
private void ensureParentDirectoriesExist() throws IOException {
if (!this.parentsExist) {
File parent = this.f.getParentFile();
if (parent != null && !parent.exists()) {
if (!parent.mkdirs()) {
// could have been concurrently created
if (!parent.exists() || !parent.isDirectory())
throw new IOException("Unable to create parent directories for " + this.f); //$NON-NLS-1$
}
}
this.parentsExist = true;
}
}
}