/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (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.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2006 Ola Bini <ola@ologix.com>
* Copyright (c) 2007 Peter Brant <peter.brant@gmail.com>
* Copyright (C) 2008 The JRuby Community <www.headius.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.internal.runtime.methods;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import org.jruby.RubyModule;
import org.jruby.anno.JRubyMethod;
import org.jruby.anno.JavaMethodDescriptor;
import org.jruby.anno.TypePopulator;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.CompiledBlockCallback;
import org.jruby.runtime.CompiledBlockCallback19;
import org.jruby.runtime.MethodFactory;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.Visibility;
import org.jruby.runtime.builtin.IRubyObject;
/**
* This MethodFactory uses reflection to provide method handles. Reflection is
* typically slower than code-generated handles, but it does provide a simple
* mechanism for binding in environments where code-generation isn't supported.
*
* @see org.jruby.internal.runtime.methods.MethodFactory
*/
public class ReflectionMethodFactory extends MethodFactory {
/**
* Use reflection to provide a method handle for a compiled Ruby method.
*
* @see org.jruby.internal.runtime.methods.MethodFactory#getCompiledMethod
*/
public DynamicMethod getCompiledMethodLazily(RubyModule implementationClass,
String methodName, Arity arity, Visibility visibility,
StaticScope scope, Object scriptObject, CallConfiguration callConfig,
ISourcePosition position, String parameterDesc) {
return getCompiledMethod(
implementationClass,
methodName,
arity,
visibility,
scope,
scriptObject,
callConfig,
position,
parameterDesc);
}
/**
* Use reflection to provide a method handle for a compiled Ruby method.
*
* @see org.jruby.internal.runtime.methods.MethodFactory#getCompiledMethod
*/
public DynamicMethod getCompiledMethod(RubyModule implementationClass,
String methodName, Arity arity, Visibility visibility,
StaticScope scope, Object scriptObject, CallConfiguration callConfig,
ISourcePosition position, String parameterDesc) {
try {
Class scriptClass = scriptObject.getClass();
Method method = scriptClass.getMethod(methodName, scriptClass, ThreadContext.class, IRubyObject.class, IRubyObject[].class, Block.class);
return new ReflectedCompiledMethod(
implementationClass,
arity,
visibility,
scope,
scriptObject,
method,
callConfig,
position,
parameterDesc);
} catch (NoSuchMethodException nsme) {
throw new RuntimeException("No method with name " + methodName + " found in " + scriptObject.getClass());
}
}
/**
* Use reflection to provide a method handle based on an annotated Java
* method.
*
* @see org.jruby.internal.runtime.methods.MethodFactory#getAnnotatedMethod
*/
public DynamicMethod getAnnotatedMethod(RubyModule implementationClass, JavaMethodDescriptor desc) {
try {
if (!Modifier.isPublic(desc.getDeclaringClass().getModifiers())) {
System.err.println("warning: binding non-public class" + desc.declaringClassName + "; reflected handles won't work");
}
Method method = desc.getDeclaringClass().getDeclaredMethod(desc.name, desc.getParameterClasses());
JavaMethod ic = new ReflectedJavaMethod(implementationClass, method, desc.anno);
TypePopulator.populateMethod(
ic,
ic.getArity().getValue(),
method.getName(),
Modifier.isStatic(method.getModifiers()),
CallConfiguration.getCallConfigByAnno(desc.anno),
desc.anno.notImplemented());
return ic;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Use reflection to provide a method handle based on an annotated Java
* method.
*
* @see org.jruby.internal.runtime.methods.MethodFactory#getAnnotatedMethod
*/
public DynamicMethod getAnnotatedMethod(RubyModule implementationClass, List<JavaMethodDescriptor> descs) {
try {
if (!Modifier.isPublic(descs.get(0).getDeclaringClass().getModifiers())) {
System.err.println("warning: binding non-public class" + descs.get(0).declaringClassName + "; reflected handles won't work");
}
List<Method> methods = new ArrayList();
List<JRubyMethod> annotations = new ArrayList();
for (JavaMethodDescriptor desc: descs) {
methods.add(desc.getDeclaringClass().getDeclaredMethod(desc.name, desc.getParameterClasses()));
annotations.add(desc.anno);
}
Method method0 = methods.get(0);
JRubyMethod anno0 = annotations.get(0);
JavaMethod ic = new ReflectedJavaMultiMethod(implementationClass, methods, annotations);
TypePopulator.populateMethod(
ic,
ic.getArity().getValue(),
method0.getName(),
Modifier.isStatic(method0.getModifiers()),
CallConfiguration.getCallConfigByAnno(anno0),
anno0.notImplemented());
return ic;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public CompiledBlockCallback getBlockCallback(String method, final String file, final int line, final Object scriptObject) {
try {
Class scriptClass = scriptObject.getClass();
final Method blockMethod = scriptClass.getMethod(method, scriptClass, ThreadContext.class, IRubyObject.class, IRubyObject.class, Block.class);
return new CompiledBlockCallback() {
public IRubyObject call(ThreadContext context, IRubyObject self, IRubyObject args, Block block) {
try {
return (IRubyObject)blockMethod.invoke(null, scriptObject, context, self, args, block);
} catch (IllegalAccessException ex) {
throw new RuntimeException(ex);
} catch (IllegalArgumentException ex) {
throw new RuntimeException(ex);
} catch (InvocationTargetException ex) {
Throwable cause = ex.getCause();
if (cause instanceof RuntimeException) {
throw (RuntimeException) cause;
} else if (cause instanceof Error) {
throw (Error) cause;
} else {
throw new RuntimeException(ex);
}
}
}
public String getFile() {
return file;
}
public int getLine() {
return line;
}
};
} catch (NoSuchMethodException nsme) {
throw new RuntimeException(nsme);
}
}
public CompiledBlockCallback19 getBlockCallback19(String method, final String file, final int line, final Object scriptObject) {
try {
Class scriptClass = scriptObject.getClass();
final Method blockMethod = scriptClass.getMethod(method, scriptClass, ThreadContext.class, IRubyObject.class, IRubyObject[].class, Block.class);
return new CompiledBlockCallback19() {
public IRubyObject call(ThreadContext context, IRubyObject self, IRubyObject[] args, Block block) {
try {
return (IRubyObject)blockMethod.invoke(null, scriptObject, context, self, args, block);
} catch (IllegalAccessException ex) {
throw new RuntimeException(ex);
} catch (IllegalArgumentException ex) {
throw new RuntimeException(ex);
} catch (InvocationTargetException ex) {
Throwable cause = ex.getCause();
if (cause instanceof RuntimeException) {
throw (RuntimeException) cause;
} else if (cause instanceof Error) {
throw (Error) cause;
} else {
throw new RuntimeException(ex);
}
}
}
public String getFile() {
return file;
}
public int getLine() {
return line;
}
};
} catch (NoSuchMethodException nsme) {
throw new RuntimeException(nsme);
}
}
}