MVELCalendarCoercion.java

/**
 * Copyright 2010 JBoss Inc
 *
 * 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.
 */

package org.drools.base.mvel;

import java.util.Calendar;

import org.drools.core.util.DateUtils;
import org.drools.type.DateFormatsImpl;
import org.mvel2.ConversionHandler;

public class MVELCalendarCoercion implements ConversionHandler {

    public boolean canConvertFrom(Class cls) {
        if (cls == String.class || cls.isAssignableFrom( Calendar.class )) {
            return true;
        } else {
            return false;
        }
    }

    public Object convertFrom(Object o) {
        if (o instanceof String) {
            Calendar cal = Calendar.getInstance();
            cal.setTime( DateUtils.parseDate( (String) o, DateFormatsImpl.dateFormats.get() ) );
            return cal;
        } else {
            return o;
        }
    }

}