org.formiz.core.expr.spel.ElContext.java Source code

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Here is the source code for org.formiz.core.expr.spel.ElContext.java

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/**
 *  Copyright SCN Guichet Entreprises, Capgemini and contributors (2014-2016)
 *
 * This software is a computer program whose purpose is to [describe
 * functionalities and technical features of your software].
 *
 * This software is governed by the CeCILL  license under French law and
 * abiding by the rules of distribution of free software.  You can  use,
 * modify and/ or redistribute the software under the terms of the CeCILL
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 *
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 *
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 *
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL license and that you accept its terms.
 */

package org.formiz.core.expr.spel;

import java.lang.reflect.Method;
import java.util.Map;

import org.formiz.core.expr.IContext;
import org.springframework.expression.BeanResolver;
import org.springframework.expression.spel.support.StandardEvaluationContext;

public class ElContext implements IContext {

    public class Context {
        /**
         * Main object we are working on.
         */
        private Object object;
        /**
         * Current object we are looking at. Can be the main object or one of
         * its children.
         */
        private Object root;

        public Object getObject() {
            return object;
        }

        public Object getRoot() {
            return root;
        }

        /**
         * @param object
         *            Main object we are working on.
         * @param root
         *            if we are looking at a children of the main object, use it
         *            as root. Can be null, in that case null = object
         */
        public void setObject(Object object, Object root) {
            this.object = object;
            this.root = root;
            if (root == null) {
                this.root = object;
            }
        }

    }

    private Context ctx;

    private StandardEvaluationContext spelContext;

    public ElContext() {
        ctx = new Context();
        spelContext = new StandardEvaluationContext();
    }

    @Override
    public Object getObject() {
        return ctx.getObject();
    }

    @Override
    public Object getRoot() {
        return ctx.getRoot();
    }

    public StandardEvaluationContext getSpelContext() {
        return spelContext;
    }

    @Override
    public void registerFunction(String name, Method method) {
        spelContext.registerFunction(name, method);
    }

    public void setBeanResolver(BeanResolver br) {
        spelContext.setBeanResolver(br);
    }

    /**
     * @param object
     *            Main object we are working on.
     * @param root
     *            if we are looking at a children of the main object, use it as
     *            root. Can be null, in that case null = object
     */
    @Override
    public void setObject(Object object, Object root) {
        ctx.setObject(object, root);
        spelContext.setRootObject(this.getRoot());

    }

    @Override
    public void setVariable(String name, Object value) {
        spelContext.setVariable(name, value);
    }

    @Override
    public void setVariables(Map<String, Object> variables) {
        spelContext.setVariables(variables);
    }
}