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/*-
 * ========================LICENSE_START=================================
 * smooks-javabean-cartridge
 * %%
 * Copyright (C) 2020 Smooks
 * %%
 * Licensed under the terms of the Apache License Version 2.0, or
 * the GNU Lesser General Public License version 3.0 or later.
 *
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-or-later
 *
 * ======================================================================
 *
 * 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.
 *
 * ======================================================================
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * =========================LICENSE_END==================================
 */
package org.smooks.cartridges.javabean;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.smooks.api.ExecutionContext;
import org.smooks.api.SmooksConfigException;
import org.smooks.api.bean.context.BeanContext;
import org.smooks.api.expression.ExecutionContextExpressionEvaluator;
import org.smooks.api.expression.ExpressionEvaluationException;
import org.smooks.engine.expression.MVELExpressionEvaluator;

import java.util.Map;

/**
 * Javabean Cartridge bean Map expression evaluator.
 * 
 * Evaluates MVEL expressions on java objects
 * bound to the supplied {@link ExecutionContext} via the {@link BeanContext}.
 * 

 * Cab be used to selectively target resources based on the
 * contents of the java objects bound to the supplied {@link ExecutionContext}
 * via the {@link BeanContext}.
 * 
 * The special EC variable gives access to the EditingContext.
 *
 * @author [email protected]
 */
public class BeanMapExpressionEvaluator extends MVELExpressionEvaluator implements ExecutionContextExpressionEvaluator {

    protected static final Logger LOGGER = LoggerFactory.getLogger(BeanMapExpressionEvaluator.class);

    public BeanMapExpressionEvaluator() {
    }

    public BeanMapExpressionEvaluator(String expression) throws SmooksConfigException {
        super(expression);
    }

    public boolean eval(ExecutionContext context) throws ExpressionEvaluationException {
        return (Boolean) getValue(context);
    }

    public Object getValue(ExecutionContext context) throws ExpressionEvaluationException {
        Map beans = context.getBeanContext().getBeanMap();

        Object value = exec(beans);

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Expression value evaluation:===============================================================");
            LOGGER.debug("\tExpression='" + getExpression() + "'");
            LOGGER.debug("\tBean Map='" + beans + "'");
            LOGGER.debug("\tValue='" + value + "'");
            LOGGER.debug("===========================================================================================");
        }

        return value;
    }

}