/*
 * Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
 * 
 * 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 freemarker.core;

import freemarker.template.Configuration;

/**
 * Represents the output format used when the template output format is undecided. This is the default output format if
 * FreeMarker can't select anything more specific (see
 * {@link Configuration#setTemplateConfigurers(freemarker.cache.TemplateConfigurerFactory)}). This format doesn't
 * support auto-escaping ({@link Configuration#setAutoEscapingPolicy(int)}). It will print {@link TemplateMarkupOutputModel}-s
 * as is (doesn't try to convert them).
 * 
 * @see PlainTextOutputFormat
 * 
 * @since 2.3.24
 */
public final class UndefinedOutputFormat extends OutputFormat {

    public static final UndefinedOutputFormat INSTANCE = new UndefinedOutputFormat();
    
    private UndefinedOutputFormat() {
        // Only to decrease visibility
    }

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

    @Override
    public String getName() {
        return "undefined";
    }

    @Override
    public String getMimeType() {
        return null;
    }

}