/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 freemarker.core;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import freemarker.template.TemplateDateModel;
import freemarker.template.TemplateModelException;

/**
 * Java {@link DateFormat}-based format.
 */
class JavaTemplateDateFormat extends TemplateDateFormat {
    
    private final DateFormat javaDateFormat;

    public JavaTemplateDateFormat(DateFormat javaDateFormat) {
        this.javaDateFormat = javaDateFormat;
    }
    
    @Override
    public String formatToPlainText(TemplateDateModel dateModel) throws TemplateModelException {
        return javaDateFormat.format(TemplateFormatUtil.getNonNullDate(dateModel));
    }

    @Override
    public Date parse(String s, int dateType) throws UnparsableValueException {
        try {
            return javaDateFormat.parse(s);
        } catch (ParseException e) {
            throw new UnparsableValueException(e.getMessage(), e);
        }
    }

    @Override
    public String getDescription() {
        return javaDateFormat instanceof SimpleDateFormat
                ? ((SimpleDateFormat) javaDateFormat).toPattern()
                : javaDateFormat.toString();
    }

    @Override
    public boolean isLocaleBound() {
        return true;
    }

    @Override
    public boolean isTimeZoneBound() {
        return true;
    }
    
}