/*
* Copyright Konstantin Triger <kostat@gmail.com>
*
* This file is part of Jaque - JAva QUEry library <http://code.google.com/p/jaque/>.
*
* Jaque is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Jaque 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package jaque.expressions;
import java.util.*;
import jaque.functions.*;
import static jaque.expressions.Expression.*;
final class QueryableExpressionVisitor extends SimpleExpressionVisitor {
public static final QueryableExpressionVisitor Instance = new QueryableExpressionVisitor();
private QueryableExpressionVisitor() {
}
public Expression visit(InvocationExpression e) {
if (e.getMethod().getExpressionType() == ExpressionType.FieldAccess) {
if (((MemberExpression) e.getMethod()).getMember().isSynthetic()) {
Object value;
try {
value = e.apply(Interpreter.Instance).invoke(null);
} catch (RuntimeException t) {
throw t;
} catch (Throwable t) {
throw new RuntimeException(t);
}
if (value instanceof Function || value instanceof Function2)
return quote(LambdaExpression.parse(value).apply(this));
return constant(value, e.getResultType());
}
}
List<Expression> args = e.getArguments();
List<Expression> newArgs = new ArrayList<Expression>(args.size());
for (int i = 0; i < args.size(); i++)
newArgs.add(args.get(i).apply(this));
return Expression.invoke((InvocableExpression) e.getMethod()
.apply(this), Collections.unmodifiableList(newArgs));
}
public Expression visit(MemberExpression e) {
Expression instance = e.getInstance();
if (instance != null) {
instance = stripQuotes(instance.apply(this));
if (instance.getExpressionType() == ExpressionType.Lambda)
return instance;
if (instance != e.getInstance())
return Expression.member(e.getExpressionType(), instance, e
.getMember(), e.getResultType(), e.getParameters());
}
return e;
}
}