/**
* 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.ambari.shell.support;
import static java.util.Collections.singletonList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.springframework.shell.support.table.Table;
import org.springframework.shell.support.table.TableHeader;
/**
* Utility class used to render tables.
*/
public final class TableRenderer {
private TableRenderer() {
throw new IllegalStateException();
}
/**
* Renders a 2 columns wide table with the given headers and rows. If headers are provided it should match with the
* number of columns.
*
* @param rows rows of the table
* @param headers headers of the table
* @return the formatted table
*/
public static String renderSingleMap(Map<String, String> rows, String... headers) {
return renderMultiValueMap(convert(rows), headers);
}
/**
* Renders a 2 columns wide table with the given headers and rows. If headers are provided it should match with the
* number of columns.
*
* @param rows rows of the table, each value will be added as a new row with the same key
* @param headers headers of the table
* @return formatted table
*/
public static String renderMultiValueMap(Map<String, List<String>> rows, String... headers) {
Table table = createTable(headers);
if (rows != null) {
for (String key : rows.keySet()) {
List<String> values = rows.get(key);
if (values != null) {
for (String value : values) {
table.addRow(key, value);
}
}
}
}
return format(table);
}
/**
* Renders a 3 columns wide table with the given headers and rows. If headers are provided it should match with the
* number of columns.
*
* @param rows rows of the table, value map will be added as the last 2 columns to the table
* @param headers headers of the table
* @return formatted table
*/
public static String renderMapValueMap(Map<String, Map<String, String>> rows, String... headers) {
Table table = createTable(headers);
if (rows != null) {
for (String key1 : rows.keySet()) {
Map<String, String> values = rows.get(key1);
if (values != null) {
for (String key2 : values.keySet()) {
table.addRow(key1, key2, values.get(key2));
}
}
}
}
return format(table);
}
private static Table createTable(String... headers) {
Table table = new Table();
if (headers != null) {
int column = 1;
for (String header : headers) {
table.addHeader(column++, new TableHeader(header));
}
}
return table;
}
private static Map<String, List<String>> convert(Map<String, String> map) {
Map<String, List<String>> result = new HashMap<String, List<String>>(map.size());
if (map != null) {
for (String key : map.keySet()) {
result.put(key, singletonList(map.get(key)));
}
}
return result;
}
private static String format(Table table) {
table.calculateColumnWidths();
return table.toString();
}
}