/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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.
 *
 * 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 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 org.neo4j.codegen;

abstract class Lookup<T> {
    static Lookup<FieldReference> field(final TypeReference type, final String name) {
        return new Lookup<>() {
            @Override
            FieldReference lookup(CodeBlock method) {
                FieldReference field = method.clazz.getField(name);
                if (field == null) {
                    throw new IllegalArgumentException(
                            method.clazz.handle() + " has no such field: " + name + " of type " + type);
                } else if (!type.equals(field.type())) {
                    throw new IllegalArgumentException(method.clazz.handle() + " has no such field: " + name
                            + " of type " + type + ", actual field has type: " + field.type());
                }
                return field;
            }
        };
    }

    abstract T lookup(CodeBlock method);
}
