org.conqat.lib.commons.filesystem.DirectoryContentProvider Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of teamscale-lib-commons Show documentation

Provides common utility functions

The newest version!

/*
 * Copyright (c) CQSE GmbH
 *
 * 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 org.conqat.lib.commons.filesystem;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;

import org.conqat.lib.commons.assertion.CCSMAssert;
import org.conqat.lib.commons.string.StringUtils;

/**
 * {@link PathBasedContentProviderBase} implementation working on directories.
 */
/* package */final class DirectoryContentProvider extends PathBasedContentProviderBase {

	/** The base directory. */
	private final File baseDir;

	/** Constructor. */
	public DirectoryContentProvider(File baseDir) {
		CCSMAssert.isTrue(baseDir.isDirectory(), "Input file must be a directory!");
		this.baseDir = baseDir;
	}

	/** {@inheritDoc} */
	@Override
	public Collection getPaths() {
		Collection result = new ArrayList<>();
		for (File file : FileSystemUtils.listFilesRecursively(baseDir)) {
			if (file.isFile()) {
				String relative = StringUtils.stripPrefix(file.getPath(), baseDir.getPath());
				result.add(StringUtils.stripPrefix(FileSystemUtils.normalizeSeparators(relative), "/"));
			}
		}
		return result;
	}

	/** {@inheritDoc} */
	@Override
	public InputStream openStream(String relativePath) throws IOException {
		return new FileInputStream(new File(baseDir, relativePath));
	}

	/** {@inheritDoc} */
	@Override
	public void close() {
		// does nothing
	}
}