com.greenpepper.shaded.org.codehaus.janino.JavaSourceIClassLoader Maven / Gradle / Ivy
/*
* Janino - An embedded Java[TM] compiler
*
* Copyright (c) 2001-2010, Arno Unkrig
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
* following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.greenpepper.shaded.org.codehaus.janino;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Set;
import com.greenpepper.shaded.org.codehaus.commons.compiler.CompileException;
import com.greenpepper.shaded.org.codehaus.commons.compiler.ErrorHandler;
import com.greenpepper.shaded.org.codehaus.commons.compiler.Location;
import com.greenpepper.shaded.org.codehaus.commons.compiler.WarningHandler;
import com.greenpepper.shaded.org.codehaus.janino.Java.CompilationUnit;
import com.greenpepper.shaded.org.codehaus.janino.util.ClassFile;
import com.greenpepper.shaded.org.codehaus.janino.util.resource.Resource;
import com.greenpepper.shaded.org.codehaus.janino.util.resource.ResourceFinder;
/**
* This {@link com.greenpepper.shaded.org.codehaus.janino.IClassLoader} finds, scans and parses compilation units.
*
* Notice that it does not compile them!
*/
public
class JavaSourceIClassLoader extends IClassLoader {
private static final boolean DEBUG = false;
private ResourceFinder sourceFinder;
private String optionalCharacterEncoding;
/** Collection of parsed compilation units. */
private final Set unitCompilers = new HashSet();
private ErrorHandler optionalCompileErrorHandler;
private WarningHandler optionalWarningHandler;
public
JavaSourceIClassLoader(
ResourceFinder sourceFinder,
String optionalCharacterEncoding,
IClassLoader optionalParentIClassLoader
) {
super(optionalParentIClassLoader);
this.sourceFinder = sourceFinder;
this.optionalCharacterEncoding = optionalCharacterEncoding;
super.postConstruct();
}
/**
* Returns the set of {@link UnitCompiler}s that were created so far.
*/
public Set
getUnitCompilers() { return this.unitCompilers; }
/** @param pathResourceFinder The source path */
public void
setSourceFinder(ResourceFinder pathResourceFinder) {
this.sourceFinder = pathResourceFinder;
}
/**
* @param optionalCharacterEncoding The name of the charset that is used to read source files, or {@code null} to
* use the platform's 'default charset'
*/
public void
setCharacterEncoding(String optionalCharacterEncoding) {
this.optionalCharacterEncoding = optionalCharacterEncoding;
}
/** @see UnitCompiler#setCompileErrorHandler(ErrorHandler) */
public void
setCompileErrorHandler(ErrorHandler optionalCompileErrorHandler) {
this.optionalCompileErrorHandler = optionalCompileErrorHandler;
}
/**
* @see Parser#setWarningHandler(WarningHandler)
* @see UnitCompiler#setCompileErrorHandler(ErrorHandler)
*/
public void
setWarningHandler(WarningHandler optionalWarningHandler) {
this.optionalWarningHandler = optionalWarningHandler;
}
/**
* @param fieldDescriptor Field descriptor of the {@link IClass} to load, e.g. "Lpkg1/pkg2/Outer$Inner;"
* @throws ClassNotFoundException An exception was raised while loading the {@link IClass}
*/
@Override public IClass
findIClass(final String fieldDescriptor) throws ClassNotFoundException {
if (JavaSourceIClassLoader.DEBUG) System.out.println("type = " + fieldDescriptor);
// Class type.
String className = Descriptor.toClassName(fieldDescriptor); // E.g. "pkg1.pkg2.Outer$Inner"
if (JavaSourceIClassLoader.DEBUG) System.out.println("2 className = \"" + className + "\"");
// Do not attempt to load classes from package "java".
if (className.startsWith("java.")) return null;
// Determine the name of the top-level class.
String topLevelClassName;
{
int idx = className.indexOf('$');
topLevelClassName = idx == -1 ? className : className.substring(0, idx);
}
// Check the already-parsed compilation units.
for (UnitCompiler uc : this.unitCompilers) {
IClass res = uc.findClass(topLevelClassName);
if (res != null) {
if (!className.equals(topLevelClassName)) {
res = uc.findClass(className);
if (res == null) return null;
}
this.defineIClass(res);
return res;
}
}
try {
Java.CompilationUnit cu = this.findCompilationUnit(className);
if (cu == null) return null;
UnitCompiler uc = new UnitCompiler(cu, this);
uc.setCompileErrorHandler(this.optionalCompileErrorHandler);
uc.setWarningHandler(this.optionalWarningHandler);
// Remember compilation unit for later compilation.
this.unitCompilers.add(uc);
// Find the class/interface declaration in the compiled unit.
IClass res = uc.findClass(className);
if (res == null) {
if (className.equals(topLevelClassName)) {
throw new CompileException(
"Compilation unit '" + className + "' does not declare a class with the same name",
(Location) null
);
}
return null;
}
this.defineIClass(res);
return res;
} catch (IOException e) {
throw new ClassNotFoundException("Parsing compilation unit '" + className + "'", e);
} catch (CompileException e) {
throw new ClassNotFoundException("Parsing compilation unit '" + className + "'", e);
}
}
/**
* Finds the Java™ source file for the named class through the configured 'source resource finder' and
* parses it.
*
* @return {@code null} iff the source file could not be found
*/
protected CompilationUnit
findCompilationUnit(String className) throws IOException, CompileException {
// Find source file.
Resource sourceResource = this.sourceFinder.findResource(ClassFile.getSourceResourceName(className));
if (sourceResource == null) return null;
if (JavaSourceIClassLoader.DEBUG) System.out.println("sourceResource=" + sourceResource);
// Scan and parse the source file.
InputStream inputStream = sourceResource.open();
try {
Scanner scanner = new Scanner(
sourceResource.getFileName(),
inputStream,
this.optionalCharacterEncoding
);
scanner.setWarningHandler(this.optionalWarningHandler);
Parser parser = new Parser(scanner);
parser.setWarningHandler(this.optionalWarningHandler);
return parser.parseCompilationUnit();
} finally {
try { inputStream.close(); } catch (IOException ex) {}
}
}
}