org.apache.nifi.toolkit.cli.impl.result.VersionedFlowSnapshotMetadataResult.java Source code

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Here is the source code for org.apache.nifi.toolkit.cli.impl.result.VersionedFlowSnapshotMetadataResult.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.nifi.toolkit.cli.impl.result;

import org.apache.commons.lang3.Validate;
import org.apache.nifi.registry.flow.VersionedFlowSnapshotMetadata;
import org.apache.nifi.toolkit.cli.api.ResultType;
import org.apache.nifi.toolkit.cli.impl.result.writer.DynamicTableWriter;
import org.apache.nifi.toolkit.cli.impl.result.writer.Table;
import org.apache.nifi.toolkit.cli.impl.result.writer.TableWriter;

import java.io.PrintStream;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

/**
 * Result for a list of VersionedFlowSnapshotMetadata.
 */
public class VersionedFlowSnapshotMetadataResult
        extends AbstractWritableResult<List<VersionedFlowSnapshotMetadata>> {

    private final List<VersionedFlowSnapshotMetadata> versions;

    public VersionedFlowSnapshotMetadataResult(final ResultType resultType,
            final List<VersionedFlowSnapshotMetadata> versions) {
        super(resultType);
        this.versions = versions;
        Validate.notNull(this.versions);
        this.versions.sort(Comparator.comparing(VersionedFlowSnapshotMetadata::getVersion));
    }

    @Override
    public List<VersionedFlowSnapshotMetadata> getResult() {
        return this.versions;
    }

    @Override
    protected void writeSimpleResult(final PrintStream output) {
        if (versions == null || versions.isEmpty()) {
            return;
        }

        // date length, with locale specifics
        final String datePattern = "%1$ta, %<tb %<td %<tY %<tR %<tZ";
        final int dateLength = String.format(datePattern, new Date()).length();

        final Table table = new Table.Builder().column("Ver", 3, 3, false)
                .column("Date", dateLength, dateLength, false).column("Author", 20, 200, true)
                .column("Message", 8, 40, true).build();

        versions.forEach(vfs -> {
            table.addRow(String.valueOf(vfs.getVersion()), String.format(datePattern, new Date(vfs.getTimestamp())),
                    vfs.getAuthor(), vfs.getComments());
        });

        final TableWriter tableWriter = new DynamicTableWriter();
        tableWriter.write(table, output);
    }
}