com.hazelcast.org.codehaus.janino.JavaSourceIClassLoader Maven / Gradle / Ivy
/*
* Janino - An embedded Java[TM] com.hazelcast.com.iler
*
* Copyright (c) 2001-2010 Arno Unkrig. All rights reserved.
* Copyright (c) 2015-2016 TIBCO Software Inc. 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. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.hazelcast.org.codehaus.janino;
import java.io.IOException;
import java.io.InputStream;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.hazelcast.org.codehaus.com.hazelcast.com.ons.com.hazelcast.com.iler.CompileException;
import com.hazelcast.org.codehaus.com.hazelcast.com.ons.com.hazelcast.com.iler.ErrorHandler;
import com.hazelcast.org.codehaus.com.hazelcast.com.ons.com.hazelcast.com.iler.Location;
import com.hazelcast.org.codehaus.com.hazelcast.com.ons.com.hazelcast.com.iler.WarningHandler;
import com.hazelcast.org.codehaus.com.hazelcast.com.ons.nullanalysis.Nullable;
import com.hazelcast.org.codehaus.janino.Java.CompilationUnit;
import com.hazelcast.org.codehaus.janino.util.ClassFile;
import com.hazelcast.org.codehaus.janino.util.resource.Resource;
import com.hazelcast.org.codehaus.janino.util.resource.ResourceFinder;
/**
* This {@link com.hazelcast.org.codehaus.janino.IClassLoader} finds, scans and parses com.hazelcast.com.ilation units.
*
* Notice that it does not com.hazelcast.com.ile them!
*
*/
public
class JavaSourceIClassLoader extends IClassLoader {
private static final Logger LOGGER = Logger.getLogger(JavaSourceIClassLoader.class.getName());
private ResourceFinder sourceFinder;
@Nullable private String optionalCharacterEncoding;
private EnumSet options = EnumSet.noneOf(JaninoOption.class);
/**
* Collection of parsed com.hazelcast.com.ilation units.
*/
private final Set unitCompilers = new HashSet();
@Nullable private ErrorHandler optionalCompileErrorHandler;
@Nullable private WarningHandler optionalWarningHandler;
public
JavaSourceIClassLoader(
ResourceFinder sourceFinder,
@Nullable String optionalCharacterEncoding,
@Nullable 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(@Nullable String optionalCharacterEncoding) {
this.optionalCharacterEncoding = optionalCharacterEncoding;
}
/**
* @see UnitCompiler#setCompileErrorHandler(ErrorHandler)
*/
public void
setCompileErrorHandler(@Nullable ErrorHandler optionalCompileErrorHandler) {
this.optionalCompileErrorHandler = optionalCompileErrorHandler;
}
/**
* @see Parser#setWarningHandler(WarningHandler)
* @see UnitCompiler#setCompileErrorHandler(ErrorHandler)
*/
public void
setWarningHandler(@Nullable WarningHandler optionalWarningHandler) {
this.optionalWarningHandler = optionalWarningHandler;
}
/**
* @return A reference to the currently effective com.hazelcast.com.ilation options; changes to it take
* effect immediately
*/
public EnumSet
options() { return this.options; }
/**
* Sets the options for all future com.hazelcast.com.ilations.
*/
public JavaSourceIClassLoader
options(EnumSet options) {
this.options = options;
return this;
}
/**
* @param fieldDescriptor Field descriptor of the {@link IClass} to load, e.g. "Lpkg1/pkg2/Outer$Inner;"
* @throws ClassNotFoundException An exception was raised while loading the {@link IClass}
*/
@Override @Nullable public IClass
findIClass(final String fieldDescriptor) throws ClassNotFoundException {
JavaSourceIClassLoader.LOGGER.entering(null, "findIClass", fieldDescriptor);
// Class type.
String className = Descriptor.toClassName(fieldDescriptor); // E.g. "pkg1.pkg2.Outer$Inner"
JavaSourceIClassLoader.LOGGER.log(Level.FINE, "className={0}", 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 com.hazelcast.com.ilation 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).options(this.options);
uc.setCompileErrorHandler(this.optionalCompileErrorHandler);
uc.setWarningHandler(this.optionalWarningHandler);
// Remember com.hazelcast.com.ilation unit for later com.hazelcast.com.ilation.
this.unitCompilers.add(uc);
// Find the class/interface declaration in the com.hazelcast.com.iled 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 com.hazelcast.com.ilation unit '" + className + "'", e);
} catch (CompileException e) {
throw new ClassNotFoundException("Parsing com.hazelcast.com.ilation 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
*/
@Nullable protected CompilationUnit
findCompilationUnit(String className) throws IOException, CompileException {
// Find source file.
Resource sourceResource = this.sourceFinder.findResource(ClassFile.getSourceResourceName(className));
JavaSourceIClassLoader.LOGGER.log(Level.FINE, "sourceResource={0}", sourceResource);
if (sourceResource == null) return null;
// Scan and parse the source file.
InputStream inputStream = sourceResource.open();
try {
Scanner scanner = new Scanner(
sourceResource.getFileName(),
inputStream,
this.optionalCharacterEncoding
);
Parser parser = new Parser(scanner);
parser.setWarningHandler(this.optionalWarningHandler);
return parser.parseCompilationUnit();
} finally {
try { inputStream.close(); } catch (IOException ex) {}
}
}
}