/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.sql.server;
import com.foundationdb.ais.model.Parameter;
import com.foundationdb.qp.operator.QueryBindings;
import com.foundationdb.server.error.ExternalRoutineInvocationException;
import com.foundationdb.server.explain.Attributes;
import com.foundationdb.server.explain.CompoundExplainer;
import com.foundationdb.server.explain.ExplainContext;
import com.foundationdb.server.explain.Label;
import com.foundationdb.server.explain.PrimitiveExplainer;
import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.ResultSet;
import java.util.ArrayDeque;
import java.util.Queue;
public class ServerJavaMethod extends ServerJavaRoutine
{
private Method method;
private Class<?>[] parameterTypes;
private Object[] methodArgs;
private Object methodResult;
public ServerJavaMethod(ServerQueryContext context,
QueryBindings bindings,
ServerRoutineInvocation invocation,
Method method) {
super(context, bindings, invocation);
this.method = method;
parameterTypes = method.getParameterTypes();
}
@Override
public void push() {
super.push();
methodArgs = methodArgs(parameterTypes);
}
protected static Object[] methodArgs(Class<?>[] parameterTypes) {
Object[] result = new Object[parameterTypes.length];
for (int i = 0; i < parameterTypes.length; i++) {
Class<?> outputType = parameterTypes[i].getComponentType();
if (outputType != null) {
result[i] = Array.newInstance(outputType, 1);
}
}
return result;
}
@Override
public void setInParameter(Parameter parameter, ServerJavaValues values, int index) {
Class<?> clazz = parameterTypes[index];
if (clazz.isArray() && clazz != byte[].class) {
Array.set(methodArgs[index], 0,
values.getObject(index, clazz.getComponentType()));
}
else {
methodArgs[index] = values.getObject(index, clazz);
}
}
@Override
public void invokeShielded() {
try {
methodResult = method.invoke(null, methodArgs);
}
catch (IllegalAccessException ex) {
throw new ExternalRoutineInvocationException(getInvocation().getRoutineName(), ex);
}
catch (InvocationTargetException ex) {
throw new ExternalRoutineInvocationException(getInvocation().getRoutineName(), ex.getTargetException());
}
}
@Override
public Object getOutParameter(Parameter parameter, int index) {
if (parameter.getDirection() == Parameter.Direction.RETURN) {
return methodResult;
}
else {
return Array.get(methodArgs[index], 0);
}
}
@Override
public Queue<ResultSet> getDynamicResultSets() {
Queue<ResultSet> result = new ArrayDeque<>();
for (int i = 0; i < parameterTypes.length; i++) {
Class<?> outputType = parameterTypes[i].getComponentType();
if ((outputType != null) && ResultSet.class.isAssignableFrom(outputType)) {
ResultSet rs = (ResultSet)Array.get(methodArgs[i], 0);
if (rs != null)
result.add(rs);
}
}
return result;
}
@Override
public CompoundExplainer getExplainer(ExplainContext context) {
Attributes atts = new Attributes();
atts.put(Label.PROCEDURE_IMPLEMENTATION,
PrimitiveExplainer.getInstance(method.toString()));
return new ServerCallExplainer(getInvocation(), atts, context);
}
}