/*
* Copyright 2011 JBoss, by Red Hat, Inc
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.errai.codegen.builder.callstack;
import org.jboss.errai.codegen.CallParameters;
import org.jboss.errai.codegen.Context;
import org.jboss.errai.codegen.MethodInvocation;
import org.jboss.errai.codegen.Statement;
import org.jboss.errai.codegen.exception.GenerationException;
import org.jboss.errai.codegen.exception.UndefinedMethodException;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaClassFactory;
import org.jboss.errai.codegen.meta.MetaMethod;
import org.jboss.errai.codegen.meta.MetaParameterizedType;
import org.jboss.errai.codegen.meta.MetaType;
import org.jboss.errai.codegen.meta.MetaTypeVariable;
import org.jboss.errai.codegen.util.GenUtil;
import java.util.Arrays;
import static org.jboss.errai.codegen.CallParameters.fromStatements;
/**
* @author Mike Brock <cbrock@redhat.com>
* @author Christian Sadilek <csadilek@redhat.com>
*/
public class MethodCall extends AbstractCallElement {
private final String methodName;
private final Object[] parameters;
private final boolean staticMethod;
public MethodCall(final String methodName, final Object[] parameters) {
this.methodName = methodName;
this.parameters = parameters;
this.staticMethod = false;
}
public MethodCall(final String methodName, final Object[] parameters, final boolean staticMethod) {
this.methodName = methodName;
this.parameters = parameters;
this.staticMethod = staticMethod;
}
@Override
public void handleCall(final CallWriter writer, final Context context, Statement statement) {
try {
CallParameters callParams = fromStatements(GenUtil.generateCallParameters(context, parameters));
statement.generate(context);
final MetaClass callType = statement.getType();
final MetaClass[] parameterTypes = callParams.getParameterTypes();
final MetaMethod method = (staticMethod) ? callType.getBestMatchingStaticMethod(methodName, parameterTypes)
: callType.getBestMatchingMethod(methodName, parameterTypes);
if (method == null) {
if (context.isPermissiveMode()) {
final UndefinedMethodException udme = new UndefinedMethodException(statement.getType(), methodName, parameterTypes);
GenUtil.rewriteBlameStackTrace(blame);
udme.initCause(blame);
udme.printStackTrace();
dummyReturn(writer, context);
return;
}
else {
final UndefinedMethodException udme = new UndefinedMethodException(statement.getType(), methodName, parameterTypes);
GenUtil.rewriteBlameStackTrace(blame);
udme.initCause(blame);
throw udme;
}
}
if (method.getGenericParameterTypes() != null) {
final MetaType[] genTypes = method.getGenericParameterTypes();
for (int i = 0; i < genTypes.length; i++) {
if (genTypes[i] instanceof MetaParameterizedType) {
if (parameters[i] instanceof MetaClass) {
final MetaType type = ((MetaParameterizedType) genTypes[i]).getTypeParameters()[0];
if (type instanceof MetaTypeVariable) {
writer.recordTypeParm(((MetaTypeVariable) type).getName(), (MetaClass) parameters[i]);
}
}
}
}
}
/**
* If the method is within the calling scope, we can strip the qualifying reference.
*/
if (statement instanceof LoadClassReference.ClassReference && context.isInScope(method)) {
writer.reset();
}
callParams = fromStatements(GenUtil.generateCallParameters(method, context, parameters));
statement = new MethodInvocation(writer, callType, method, callParams);
resultType = statement.getType();
nextOrReturn(writer, context, statement);
}
catch (GenerationException ge) {
blameAndRethrow(ge);
}
catch (Exception e) {
throw new RuntimeException("error generating method call for: " + methodName
+ "(" + Arrays.toString(parameters) + ")", e);
}
}
@Override
public String toString() {
return "[[MethodCall<" + methodName + "(" + Arrays.toString(parameters) + ")>]" + next + "]";
}
private void dummyReturn(final CallWriter writer, final Context context) {
nextOrReturn(writer, context, new Statement() {
@Override
public String generate(final Context context) {
final StringBuilder parms = new StringBuilder();
for (int i = 0; i < parameters.length; i++) {
parms.append(GenUtil.generate(context, parameters[i]));
if (i + 1 < parameters.length) parms.append(", ");
}
return methodName + "(" + parms.toString() + ")";
}
@Override
public MetaClass getType() {
return MetaClassFactory.get(Object.class);
}
});
}
}