/*
* Copyright (c) 2005, 2007, 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
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*/
package com.sun.jmx.mbeanserver;
import java.io.InvalidObjectException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import javax.management.Descriptor;
import javax.management.MBeanException;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.OpenType;
final class ConvertingMethod {
static ConvertingMethod from(Method m) {
try {
return new ConvertingMethod(m);
} catch (OpenDataException ode) {
final String msg = "Method " + m.getDeclaringClass().getName() +
"." + m.getName() + " has parameter or return type that " +
"cannot be translated into an open type";
throw new IllegalArgumentException(msg, ode);
}
}
Method getMethod() {
return method;
}
Descriptor getDescriptor() {
return Introspector.descriptorForElement(method);
}
Type getGenericReturnType() {
return method.getGenericReturnType();
}
Type[] getGenericParameterTypes() {
return method.getGenericParameterTypes();
}
String getName() {
return method.getName();
}
OpenType getOpenReturnType() {
return returnConverter.getOpenType();
}
OpenType[] getOpenParameterTypes() {
final OpenType[] types = new OpenType[paramConverters.length];
for (int i = 0; i < paramConverters.length; i++)
types[i] = paramConverters[i].getOpenType();
return types;
}
/* Check that this method will be callable when we are going from
* open types to Java types, for example when we are going from
* an MXBean wrapper to the underlying resource.
* The parameters will be converted to
* Java types, so they must be "reconstructible". The return
* value will be converted to an Open Type, so if it is convertible
* at all there is no further check needed.
*/
void checkCallFromOpen() throws IllegalArgumentException {
try {
for (OpenConverter paramConverter : paramConverters)
paramConverter.checkReconstructible();
} catch (InvalidObjectException e) {
throw new IllegalArgumentException(e);
}
}
/* Check that this method will be callable when we are going from
* Java types to open types, for example when we are going from
* an MXBean proxy to the open types that it will be mapped to.
* The return type will be converted back to a Java type, so it
* must be "reconstructible". The parameters will be converted to
* open types, so if it is convertible at all there is no further
* check needed.
*/
void checkCallToOpen() throws IllegalArgumentException {
try {
returnConverter.checkReconstructible();
} catch (InvalidObjectException e) {
throw new IllegalArgumentException(e);
}
}
String[] getOpenSignature() {
if (paramConverters.length == 0)
return noStrings;
String[] sig = new String[paramConverters.length];
for (int i = 0; i < paramConverters.length; i++)
sig[i] = paramConverters[i].getOpenClass().getName();
return sig;
}
final Object toOpenReturnValue(MXBeanLookup lookup, Object ret)
throws OpenDataException {
return returnConverter.toOpenValue(lookup, ret);
}
final Object fromOpenReturnValue(MXBeanLookup lookup, Object ret)
throws InvalidObjectException {
return returnConverter.fromOpenValue(lookup, ret);
}
final Object[] toOpenParameters(MXBeanLookup lookup, Object[] params)
throws OpenDataException {
if (paramConversionIsIdentity || params == null)
return params;
final Object[] oparams = new Object[params.length];
for (int i = 0; i < params.length; i++)
oparams[i] = paramConverters[i].toOpenValue(lookup, params[i]);
return oparams;
}
final Object[] fromOpenParameters(MXBeanLookup lookup, Object[] params)
throws InvalidObjectException {
if (paramConversionIsIdentity || params == null)
return params;
final Object[] jparams = new Object[params.length];
for (int i = 0; i < params.length; i++)
jparams[i] = paramConverters[i].fromOpenValue(lookup, params[i]);
return jparams;
}
final Object toOpenParameter(MXBeanLookup lookup,
Object param,
int paramNo)
throws OpenDataException {
return paramConverters[paramNo].toOpenValue(lookup, param);
}
final Object fromOpenParameter(MXBeanLookup lookup,
Object param,
int paramNo)
throws InvalidObjectException {
return paramConverters[paramNo].fromOpenValue(lookup, param);
}
Object invokeWithOpenReturn(MXBeanLookup lookup,
Object obj, Object[] params)
throws MBeanException, IllegalAccessException,
InvocationTargetException {
final Object[] javaParams;
try {
javaParams = fromOpenParameters(lookup, params);
} catch (InvalidObjectException e) {
// probably can't happen
final String msg = methodName() + ": cannot convert parameters " +
"from open values: " + e;
throw new MBeanException(e, msg);
}
final Object javaReturn = method.invoke(obj, javaParams);
try {
return returnConverter.toOpenValue(lookup, javaReturn);
} catch (OpenDataException e) {
// probably can't happen
final String msg = methodName() + ": cannot convert return " +
"value to open value: " + e;
throw new MBeanException(e, msg);
}
}
private String methodName() {
return method.getDeclaringClass() + "." + method.getName();
}
private ConvertingMethod(Method m) throws OpenDataException {
this.method = m;
returnConverter = OpenConverter.toConverter(m.getGenericReturnType());
Type[] params = m.getGenericParameterTypes();
paramConverters = new OpenConverter[params.length];
boolean identity = true;
for (int i = 0; i < params.length; i++) {
paramConverters[i] = OpenConverter.toConverter(params[i]);
identity &= paramConverters[i].isIdentity();
}
paramConversionIsIdentity = identity;
}
private static final String[] noStrings = new String[0];
private final Method method;
private final OpenConverter returnConverter;
private final OpenConverter[] paramConverters;
private final boolean paramConversionIsIdentity;
}