org.extendj.ast.ClassSource Maven / Gradle / Ivy
package org.extendj.ast;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.ArrayList;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;
import java.util.zip.*;
import java.io.*;
import org.jastadd.util.PrettyPrintable;
import org.jastadd.util.PrettyPrinter;
import org.jastadd.util.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.IOException;
import java.util.Set;
import beaver.*;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
/**
* @ast class
* @aspect PathPart
* @declaredat /home/jesper/git/extendj/java4/frontend/PathPart.jadd:46
*/
public abstract class ClassSource extends java.lang.Object {
protected final PathPart sourcePath;
/**
* Used to represent an non-existent compilation unit source file.
*
* This class source should never be used to attempt to load a class, it
* is simply used as a marker to indicate failure to find a compilation
* unit.
*/
public static final ClassSource NONE = new ClassSource(null) {
@Override
public long lastModified() {
return 0;
}
@Override
public InputStream openInputStream() {
throw new UnsupportedOperationException(
"ClassSource.NONE can not open an input stream!");
}
@Override
public String pathName() {
return "";
}
};
public ClassSource(PathPart sourcePath) {
this.sourcePath = sourcePath;
}
public PathPart getSourcePath() {
return sourcePath;
}
/**
* @return Last modification time of the class source.
*/
abstract public long lastModified();
/**
* @return Input stream pointing to the class source.
*/
abstract public InputStream openInputStream() throws IOException;
/**
* It is sufficient to only overload pathName if sourceName=pathName
* @return the full name of the class source (e.g. file path).
*/
public String sourceName() {
return pathName();
}
/**
* @return the path to the source file or the enclosing jar file
*/
abstract public String pathName();
/**
* It is sufficient to only overload pathName if relativeName = pathName
* @return the path to the source file, or the path to the file inside a
* jar file
*/
public String relativeName() {
return pathName();
}
@Override
public String toString() {
return sourceName();
}
/**
* Parses the compilation unit from this class source.
*
* NB only call this once! The input stream is closed after the compilation
* unit is parsed.
*
* @return parsed compilation unit, or {@code null} if something failed
*/
public CompilationUnit parseCompilationUnit(Program program) throws IOException {
InputStream is = openInputStream();
try {
if (program.options().verbose()) {
System.out.print("Loading " + sourceName());
}
long start = System.nanoTime();
CompilationUnit u = program.javaParser.parse(is, sourceName());
long elapsed = System.nanoTime() - start;
program.javaParseTime += elapsed;
program.numJavaFiles += 1;
u.setFromSource(true);
u.setClassSource(this);
if (program.options().verbose()) {
System.out.println(" in " + (elapsed / 1000000) + " ms");
}
return u;
} catch (Exception e) {
System.err.println("Unexpected error of kind " + e.getClass().getName());
throw new Error(sourceName() + ": " + e.getMessage(), e);
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
}
}
}
}
}