12 changed files with 209 additions and 157 deletions
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/* |
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* Copyright 2012-2017 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.boot.autoconfigure.template; |
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import java.util.List; |
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import org.springframework.beans.BeanUtils; |
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import org.springframework.boot.bind.PropertySourcesPropertyValues; |
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import org.springframework.boot.bind.RelaxedDataBinder; |
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import org.springframework.core.env.ConfigurableEnvironment; |
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import org.springframework.core.env.Environment; |
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import org.springframework.core.io.ResourceLoader; |
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import org.springframework.util.ClassUtils; |
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/** |
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* Abstract base class for {@link TemplateAvailabilityProvider} implementations. |
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* |
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* @author Andy Wilkinson |
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* @author Phillip Webb |
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* @since 1.4.6 |
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*/ |
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public abstract class AbstractTemplateAvailabilityProvider |
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implements TemplateAvailabilityProvider { |
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private final String className; |
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private final Class<? extends TemplateAvailabilityProperties> propertiesClass; |
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private final String propertyPrefix; |
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public AbstractTemplateAvailabilityProvider(String className, |
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Class<? extends TemplateAvailabilityProperties> propertiesClass, |
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String propertyPrefix) { |
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this.className = className; |
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this.propertiesClass = propertiesClass; |
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this.propertyPrefix = propertyPrefix; |
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} |
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@Override |
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public boolean isTemplateAvailable(String view, Environment environment, |
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ClassLoader classLoader, ResourceLoader resourceLoader) { |
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if (ClassUtils.isPresent(this.className, classLoader)) { |
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TemplateAvailabilityProperties properties = BeanUtils |
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.instantiateClass(this.propertiesClass); |
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RelaxedDataBinder binder = new RelaxedDataBinder(properties, |
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this.propertyPrefix); |
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binder.bind(new PropertySourcesPropertyValues( |
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((ConfigurableEnvironment) environment).getPropertySources())); |
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return isTemplateAvailable(view, resourceLoader, properties); |
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} |
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return false; |
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} |
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private boolean isTemplateAvailable(String view, ResourceLoader resourceLoader, |
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TemplateAvailabilityProperties properties) { |
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String location = properties.getPrefix() + view + properties.getSuffix(); |
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for (String path : properties.getLoaderPath()) { |
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if (resourceLoader.getResource(path + location).exists()) { |
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return true; |
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} |
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} |
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return false; |
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} |
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protected static abstract class TemplateAvailabilityProperties { |
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private String prefix; |
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private String suffix; |
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protected TemplateAvailabilityProperties(String prefix, String suffix) { |
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this.prefix = prefix; |
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this.suffix = suffix; |
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} |
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protected abstract List<String> getLoaderPath(); |
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public String getPrefix() { |
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return this.prefix; |
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} |
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public void setPrefix(String prefix) { |
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this.prefix = prefix; |
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} |
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public String getSuffix() { |
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return this.suffix; |
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} |
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public void setSuffix(String suffix) { |
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this.suffix = suffix; |
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} |
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} |
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} |
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