001/*
002 * Copyright 2012-2017 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.autoconfigure.mustache;
018
019import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProvider;
020import org.springframework.core.env.Environment;
021import org.springframework.core.io.ResourceLoader;
022import org.springframework.util.ClassUtils;
023
024/**
025 * {@link TemplateAvailabilityProvider} that provides availability information for
026 * Mustache view templates.
027 *
028 * @author Dave Syer
029 * @author Madhura Bhave
030 * @since 1.2.2
031 */
032public class MustacheTemplateAvailabilityProvider
033                implements TemplateAvailabilityProvider {
034
035        @Override
036        public boolean isTemplateAvailable(String view, Environment environment,
037                        ClassLoader classLoader, ResourceLoader resourceLoader) {
038                if (ClassUtils.isPresent("com.samskivert.mustache.Template", classLoader)) {
039                        String prefix = environment.getProperty("spring.mustache.prefix",
040                                        MustacheProperties.DEFAULT_PREFIX);
041                        String suffix = environment.getProperty("spring.mustache.suffix",
042                                        MustacheProperties.DEFAULT_SUFFIX);
043                        return resourceLoader.getResource(prefix + view + suffix).exists();
044                }
045                return false;
046        }
047
048}