com.redhat.red.offliner.alist.PlaintextArtifactListReader.java Source code

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Here is the source code for com.redhat.red.offliner.alist.PlaintextArtifactListReader.java

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/**
 * Copyright (C) 2015 Red Hat, Inc. (jcasey@redhat.com)
 *
 * 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 com.redhat.red.offliner.alist;

import com.redhat.red.offliner.model.ArtifactList;
import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Artifact list paths reader which reads the paths from a plaintext file. On each line a relative path to the
 * repository root is expected. The reader simply reads the lines and returns them. The lines are not trimmed in any way
 * and empty lines are returned along with standard lines which can cause subsequent problems.
 *
 * Supported files cannot end with .xml or .pom. This is simply to exclude pom files and may be changed in the future.
 */
public class PlaintextArtifactListReader implements ArtifactListReader {

    @Override
    public ArtifactList readPaths(final File file) throws IOException {
        List<String> paths = new ArrayList<>();
        Map<String, String> checksums = new HashMap<String, String>();
        List<String> contents = FileUtils.readLines(file);

        if (null == contents || contents.isEmpty()) {
            return null;
        }

        for (String c : contents) {
            c = c.trim();
            if (c.startsWith("#") || c.startsWith("//") || c.startsWith(";")) {
                //common comment types.
                continue;
            }

            // handle potential for spaces around the comma.
            String[] cArr = c.split("\\s*,\\s*");
            if (cArr.length == 0) {
                continue;
            } else if (cArr.length == 1) {
                paths.add(cArr[0]);
            } else {
                paths.add(cArr[1]);
                checksums.put(cArr[1], cArr[0]);
            }
        }

        ArtifactList result = new ArtifactList(paths, Collections.emptyList(), checksums);
        return result;
    }

    @Override
    public boolean supports(final File file) {
        String filename = file.getName();
        // TODO think of a better way how to check if the file is supported by this reader
        return !filename.endsWith(".json") && !filename.endsWith(".xml") && !filename.endsWith(".pom");
    }
}