/* * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.tracing;import java.lang.reflect.Method;import java.lang.reflect.Field;import com.sun.tracing.Probe;/** * Provides common code for implementation of {@code Probe} classes. * * @since 1.7 */public abstract class ProbeSkeleton implements Probe { protected Class<?>[] parameters; protected ProbeSkeleton(Class<?>[] parameters) { this.parameters = parameters; } public abstract boolean isEnabled(); // framework-dependent /** * Triggers the probe with verified arguments. * * The caller of this method must have already determined that the * arity and types of the arguments match what the probe was * declared with. */ public abstract void uncheckedTrigger(Object[] args); // framework-dependent private static boolean isAssignable(Object o, Class<?> formal) { if (o != null) { if ( !formal.isInstance(o) ) { if ( formal.isPrimitive() ) { // o might be a boxed primitive try { // Yuck. There must be a better way of doing this Field f = o.getClass().getField("TYPE"); return formal.isAssignableFrom((Class<?>)f.get(null)); } catch (Exception e) { /* fall-through. */ } } return false; } } return true; } /** * Performs a type-check of the parameters before triggering the probe. */ public void trigger(Object ... args) { if (args.length != parameters.length) { throw new IllegalArgumentException("Wrong number of arguments"); } else { for (int i = 0; i < parameters.length; ++i) { if ( !isAssignable(args[i], parameters[i]) ) { throw new IllegalArgumentException( "Wrong type of argument at position " + i); } } uncheckedTrigger(args); } }}
/*
* Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.tracing;
import java.lang.reflect.Method;
import java.lang.reflect.Field;
import com.sun.tracing.Probe;
/**
* Provides common code for implementation of {@code Probe} classes.
*
* @since 1.7
*/
public abstract class ProbeSkeleton implements Probe {
protected Class<?>[] parameters;
protected ProbeSkeleton(Class<?>[] parameters) {
this.parameters = parameters;
}
public abstract boolean isEnabled(); // framework-dependent
/**
* Triggers the probe with verified arguments.
*
* The caller of this method must have already determined that the
* arity and types of the arguments match what the probe was
* declared with.
*/
public abstract void uncheckedTrigger(Object[] args); // framework-dependent
private static boolean isAssignable(Object o, Class<?> formal) {
if (o != null) {
if ( !formal.isInstance(o) ) {
if ( formal.isPrimitive() ) { // o might be a boxed primitive
try {
// Yuck. There must be a better way of doing this
Field f = o.getClass().getField("TYPE");
return formal.isAssignableFrom((Class<?>)f.get(null));
} catch (Exception e) {
/* fall-through. */
}
}
return false;
}
}
return true;
}
/**
* Performs a type-check of the parameters before triggering the probe.
*/
public void trigger(Object ... args) {
if (args.length != parameters.length) {
throw new IllegalArgumentException("Wrong number of arguments");
} else {
for (int i = 0; i < parameters.length; ++i) {
if ( !isAssignable(args[i], parameters[i]) ) {
throw new IllegalArgumentException(
"Wrong type of argument at position " + i);
}
}
uncheckedTrigger(args);
}
}
}