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

Go to download
/**
 * Copyright (C) 2011-2013 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 groovy.lang.Binding;
import groovy.lang.GroovyRuntimeException;
import groovy.lang.GroovyShell;
import groovy.lang.MissingPropertyException;
import groovy.lang.Script;

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

import org.bonitasoft.engine.expression.NonEmptyContentExpressionExecutorStrategy;
import org.bonitasoft.engine.expression.exception.SExpressionDependencyMissingException;
import org.bonitasoft.engine.expression.exception.SExpressionEvaluationException;
import org.bonitasoft.engine.expression.model.ExpressionKind;
import org.bonitasoft.engine.expression.model.SExpression;

/**
 * @author Zhao na
 * @author Baptiste Mesta
 * @author Matthieu Chaffotte
 */
public class GroovyScriptExpressionExecutorStrategy extends NonEmptyContentExpressionExecutorStrategy {

    @Override
    public Object evaluate(final SExpression expression, final Map dependencyValues, final Map resolvedExpressions)
            throws SExpressionEvaluationException {
        final String expressionContent = expression.getContent();
        final ClassLoader scriptClassLoader = Thread.currentThread().getContextClassLoader();
        try {
            final GroovyShell shell = new GroovyShell(scriptClassLoader);
            final Script script = shell.parse(expressionContent);// can put the name here
            final Binding binding = new Binding(dependencyValues);
            script.setBinding(binding);
            return script.evaluate(expressionContent);// .evaluate(expressionContent);run()
        } catch (final MissingPropertyException e) {
            final String property = e.getProperty();
            final StringBuilder builder = new StringBuilder("Expression ");
            builder.append(expression.getName()).append(" with content: ").append(expressionContent).append(" depends on ").append(property)
                    .append(" is neither defined in the script nor in dependencies");
            throw new SExpressionEvaluationException(builder.toString(), e);
        } catch (final GroovyRuntimeException e) {
            throw new SExpressionEvaluationException(e);
        } catch (final Throwable e) {
            throw new SExpressionEvaluationException("Script throws an exception" + expression, e);
        }
    }

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

    @Override
    public List