org.mvel2.optimizers.impl.refl.nodes.ListAccessor Maven / Gradle / Ivy
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With inspiration from other libraries
/**
* MVEL (The MVFLEX Expression Language)
*
* Copyright (C) 2007 Christopher Brock, MVFLEX/Valhalla Project and the Codehaus
*
* 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.mvel2.optimizers.impl.refl.nodes;
import org.mvel2.compiler.AccessorNode;
import org.mvel2.integration.VariableResolverFactory;
import java.util.List;
public class ListAccessor implements AccessorNode {
private AccessorNode nextNode;
private int index;
public ListAccessor() {
}
public ListAccessor(int index) {
this.index = index;
}
public Object getValue(Object ctx, Object elCtx, VariableResolverFactory vars) {
if (nextNode != null) {
return nextNode.getValue(((List) ctx).get(index), elCtx, vars);
}
else {
return ((List) ctx).get(index);
}
}
public Object setValue(Object ctx, Object elCtx, VariableResolverFactory vars, Object value) {
if (nextNode != null) {
return nextNode.setValue(((List) ctx).get(index), elCtx, vars, value);
}
else {
//noinspection unchecked
((List) ctx).set(index, value);
return value;
}
}
public int getIndex() {
return index;
}
public void setIndex(int index) {
this.index = index;
}
public AccessorNode getNextNode() {
return nextNode;
}
public AccessorNode setNextNode(AccessorNode nextNode) {
return this.nextNode = nextNode;
}
public String toString() {
return "Array Accessor -> [" + index + "]";
}
public Class getKnownEgressType() {
return Object.class;
}
}