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/**
 * Copyright (C) 2015 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This library 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
 * version 2.1 of the License.
 * This library 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.
 **/
package org.bonitasoft.engine.expression.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.bonitasoft.engine.commons.ClassReflector;
import org.bonitasoft.engine.commons.exceptions.SReflectException;
import org.bonitasoft.engine.expression.ContainerState;
import org.bonitasoft.engine.expression.NonEmptyContentExpressionExecutorStrategy;
import org.bonitasoft.engine.expression.exception.SExpressionEvaluationException;
import org.bonitasoft.engine.expression.exception.SInvalidExpressionException;
import org.bonitasoft.engine.expression.model.ExpressionKind;
import org.bonitasoft.engine.expression.model.SExpression;

/**
 * @author Elias Ricken de Medeiros
 * @author Celine Souchet
 */
public class JavaMethodCallExpressionExecutorStrategy extends NonEmptyContentExpressionExecutorStrategy {

    @Override
    public Object evaluate(final SExpression expression, final Map context, final Map resolvedExpressions,
            final ContainerState containerState) throws SExpressionEvaluationException {
        final SExpression dependency = expression.getDependencies().get(0);
        final Object object = resolvedExpressions.get(dependency.getDiscriminant());
        try {
            return ClassReflector.invokeGetter(object, expression.getContent());
        } catch (final SReflectException e) {
            throw new SExpressionEvaluationException(e, expression.getName());
        }
    }

    @Override
    public void validate(final SExpression expression) throws SInvalidExpressionException {
        super.validate(expression);
        if (expression.getDependencies() == null || expression.getDependencies().size() != 1) {
            throw new SInvalidExpressionException("An expression of type " + TYPE_JAVA_METHOD_CALL
                    + " must have exactly one dependency. This dependency represents the object where the method will be called. Expression :" + expression,
                    expression.getName());
        }
    }

    @Override
    public ExpressionKind getExpressionKind() {
        return KIND_JAVA_METHOD_CALL;
    }

    @Override
    public List