io.wcm.devops.conga.resource.ClasspathResourceCollectionImpl.java Source code

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Here is the source code for io.wcm.devops.conga.resource.ClasspathResourceCollectionImpl.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2015 wcm.io
 * %%
 * 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.
 * #L%
 */
package io.wcm.devops.conga.resource;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.SortedSet;
import java.util.stream.Collectors;

import org.apache.commons.lang3.StringUtils;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import com.google.common.collect.ImmutableSortedSet;

class ClasspathResourceCollectionImpl extends AbstractClasspathResourceImpl implements ResourceCollection {

    private final List<URL> fileUrls = new ArrayList<>();
    private final List<String> folderPaths = new ArrayList<>();
    private final ResourceLoader resourceLoader;

    ClasspathResourceCollectionImpl(String path, ResourceLoader resourceLoader) {
        super(path, resourceLoader.getClassLoader());
        this.resourceLoader = resourceLoader;

        try {
            PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(
                    this.classLoader);
            org.springframework.core.io.Resource[] classpathResources = resolver
                    .getResources("classpath*:" + convertPath(path) + "/*");
            for (org.springframework.core.io.Resource resource : classpathResources) {
                if (isFolder(resource)) {
                    folderPaths.add(path + "/" + resource.getFilename());
                } else {
                    fileUrls.add(resource.getURL());
                }
            }
        } catch (FileNotFoundException ex) {
            // empty folder
        } catch (IOException ex) {
            throw new ResourceException("Unable to enumerate classpath resources at " + path, ex);
        }
    }

    private static boolean isFolder(org.springframework.core.io.Resource classpathResource) throws IOException {
        return StringUtils.endsWith(classpathResource.getURL().toString(), "/");
    }

    @Override
    public boolean exists() {
        return !fileUrls.isEmpty();
    }

    @Override
    public Resource getResource(String childPath) {
        return resourceLoader.getResource(this, childPath);
    }

    @Override
    public ResourceCollection getResourceCollection(String childPath) {
        return resourceLoader.getResourceCollection(this, childPath);
    }

    @Override
    public SortedSet<Resource> getResources() {
        return ImmutableSortedSet.copyOf(fileUrls.stream()
                .map(url -> new ClasspathResourceImpl(url, resourceLoader)).collect(Collectors.toList()));
    }

    @Override
    public SortedSet<ResourceCollection> getResourceCollections() {
        return ImmutableSortedSet.copyOf(folderPaths.stream()
                .map(folderPath -> new ClasspathResourceCollectionImpl(folderPath, resourceLoader))
                .collect(Collectors.toList()));
    }

}