/*
* Copyright (C) 2015 SoftIndex LLC.
*
* 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 io.datakernel.codegen;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static io.datakernel.codegen.Utils.*;
import static java.lang.String.format;
import static org.objectweb.asm.Type.getType;
final class ExpressionCallStatic implements Expression {
private final Class<?> owner;
private final String name;
private final List<Expression> arguments = new ArrayList<>();
ExpressionCallStatic(Class<?> owner, String name, Expression... arguments) {
this.owner = owner;
this.name = name;
this.arguments.addAll(Arrays.asList(arguments));
}
@Override
public Type type(Context ctx) {
List<Class<?>> argumentClasses = new ArrayList<>();
List<Type> argumentTypes = new ArrayList<>();
for (Expression argument : arguments) {
argumentTypes.add(argument.type(ctx));
argumentClasses.add(getJavaType(ctx.getClassLoader(), argument.type(ctx)));
}
Class<?>[] arguments = argumentClasses.toArray(new Class<?>[]{});
Type returnType;
try {
Method method = owner.getMethod(name, arguments);
Class<?> returnClass = method.getReturnType();
returnType = getType(returnClass);
} catch (NoSuchMethodException e) {
throw new RuntimeException(format("No static method %s.%s(%s). %s",
owner.getName(),
name,
(!argumentClasses.isEmpty() ? argsToString(argumentClasses) : ""),
exceptionInGeneratedClass(ctx)));
}
return returnType;
}
@Override
public Type load(Context ctx) {
List<Class<?>> argumentClasses = new ArrayList<>();
List<Type> argumentTypes = new ArrayList<>();
for (Expression argument : arguments) {
argument.load(ctx);
argumentTypes.add(argument.type(ctx));
if (argument.type(ctx).equals(getType(Object[].class))) {
argumentClasses.add(Object[].class);
} else {
argumentClasses.add(getJavaType(ctx.getClassLoader(), argument.type(ctx)));
}
}
Class<?>[] arguments = argumentClasses.toArray(new Class<?>[]{});
Type returnType;
Method method;
try {
Class<?> ownerJavaType = getJavaType(ctx.getClassLoader(), Type.getType(owner));
method = ownerJavaType.getMethod(name, arguments);
Class<?> returnClass = method.getReturnType();
returnType = getType(returnClass);
} catch (NoSuchMethodException e) {
throw new RuntimeException(format("No static method %s.%s(%s). %s",
owner.getName(),
name,
(!argumentClasses.isEmpty() ? argsToString(argumentClasses) : ""),
exceptionInGeneratedClass(ctx)));
}
GeneratorAdapter g = ctx.getGeneratorAdapter();
g.invokeStatic(Type.getType(owner), org.objectweb.asm.commons.Method.getMethod(method));
return returnType;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ExpressionCallStatic that = (ExpressionCallStatic) o;
if (owner != null ? !owner.equals(that.owner) : that.owner != null) return false;
if (name != null ? !name.equals(that.name) : that.name != null) return false;
return !(arguments != null ? !arguments.equals(that.arguments) : that.arguments != null);
}
@Override
public int hashCode() {
int result = owner != null ? owner.hashCode() : 0;
result = 31 * result + (name != null ? name.hashCode() : 0);
result = 31 * result + (arguments != null ? arguments.hashCode() : 0);
return result;
}
}