org.bonitasoft.engine.expression.impl.ConstantExpressionExecutorStrategy Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of bonita-server Show documentation
The newest version!
/**
 * Copyright (C) 2019 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.io.Serializable;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;

import org.bonitasoft.engine.expression.ContainerState;
import org.bonitasoft.engine.expression.ExpressionExecutorStrategy;
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 Zhao na
 * @author Baptiste Mesta
 * @author Celine Souchet
 * @author Matthieu Chaffotte
 */
public class ConstantExpressionExecutorStrategy implements ExpressionExecutorStrategy {

    private static final String REGEX_PARSE_DATE = "(\\d{4})(-([01]\\d)((-([0-3]\\d)(T(\\d\\d):(\\d\\d)(((:(\\d\\d))?(\\.(\\d\\d))?(([\\+-])(\\d\\d):(\\d\\d))?)?)?)?)?)?)?";

    @Override
    public void validate(final SExpression expression) throws SInvalidExpressionException {
        if ("".equals(expression.getContent().trim())) {
            throw new SInvalidExpressionException("The expression content cannot be empty. Expression : " + expression,
                    expression.getName());
        }
    }

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

    @Override
    public Object evaluate(final SExpression expression, final Map context,
            final Map resolvedExpressions,
            final ContainerState containerState) throws SExpressionEvaluationException {
        final String expressionContent = expression.getContent();
        Serializable result;
        final String returnType = expression.getReturnType();
        // here need to improve
        try {
            if (Boolean.class.getName().equals(returnType)) {
                result = Boolean.parseBoolean(expressionContent);
            } else if (Long.class.getName().equals(returnType)) {
                result = Long.parseLong(expressionContent);
            } else if (Double.class.getName().equals(returnType)) {
                result = Double.parseDouble(expressionContent);
            } else if (Float.class.getName().equals(returnType)) {
                result = Float.parseFloat(expressionContent);
            } else if (Integer.class.getName().equals(returnType)) {
                result = Integer.parseInt(expressionContent);
            } else if (String.class.getName().equals(returnType)) {
                result = expressionContent;
            } else if (Date.class.getName().equals(returnType)) { // "2013-01-02T02:42:12.17+02:00"
                result = parseDate(expressionContent);
            } else if (LocalDate.class.getName().equals(returnType)) {
                result = LocalDate.parse(expressionContent);
            } else if (LocalDateTime.class.getName().equals(returnType)) {
                result = LocalDateTime.parse(expressionContent);
            } else if (OffsetDateTime.class.getName().equals(returnType)) {
                result = OffsetDateTime.parse(expressionContent);
            } else {
                throw new SExpressionEvaluationException(
                        "Unknown return type: " + returnType + " for expression " + expression.getName() + " : "
                                + expressionContent,
                        expression.getName());
            }
        } catch (final NumberFormatException e) {
            throw new SExpressionEvaluationException(
                    "The content of the expression \"" + expression.getName() + "\" is not a number :"
                            + expressionContent,
                    e,
                    expression.getName());
        }
        return result;
    }

    @Override
    public List