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}