org.mvel2.optimizers.impl.refl.collection.MapCreator Maven / Gradle / Ivy

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/**
 * 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.collection;

import java.util.HashMap;
import java.util.Map;

import org.mvel2.compiler.Accessor;
import org.mvel2.integration.VariableResolverFactory;

/**
 * @author Christopher Brock
 */
public class MapCreator implements Accessor {

    private Accessor[] keys;
    private Accessor[] vals;
    private int size;

    public MapCreator(Accessor[] keys, Accessor[] vals) {
        this.size = (this.keys = keys).length;
        this.vals = vals;
    }

    public Object getValue(Object ctx, Object elCtx, VariableResolverFactory variableFactory) {
        Map map = new HashMap(size * 2);
        for (int i = size - 1; i != -1; i--) {
            //noinspection unchecked
            map.put(keys[i].getValue(ctx, elCtx, variableFactory), vals[i].getValue(ctx, elCtx, variableFactory));
        }
        return map;
    }

    public Object setValue(Object ctx, Object elCtx, VariableResolverFactory variableFactory, Object value) {
        // not implemented
        return null;
    }

    public Class getKnownEgressType() {
        return Map.class;
    }
}