org.drools.core.util.asm.FieldAccessor Maven / Gradle / Ivy
/*
* Copyright 2005 Red Hat, Inc. and/or its affiliates.
*
* 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.drools.core.util.asm;
import java.io.Serializable;
/**
* This provides "field" access to getters on a given class.
* Implementations are generated into byte code (using a switchtable)
* when a new class is encountered.
* @deprecated use ClassFieldExtractor instead
*/
public interface FieldAccessor
extends
Serializable {
/**
* Returns the "field" corresponding to the order in which it is in the object (class).
*
* @param obj The object for the field to be extracted from.
* @param idx The index of the "field". Refer to FieldAccessorMap to get the mapping
* of the names of the "fields" to the index value to use for fast lookup.
*
* @return Appropriate return type. Primitives are boxed to the corresponding type.
*/
public Object getFieldByIndex(Object obj,
int idx);
}