| /* |
| * 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.knox.gateway.shell.table; |
| |
| import java.util.List; |
| import java.util.function.Predicate; |
| import java.util.regex.Pattern; |
| |
| public class KnoxShellTableFilter { |
| |
| final long id; |
| final KnoxShellTable tableToFilter; |
| private int index; |
| |
| KnoxShellTableFilter(KnoxShellTable table) { |
| this.id = KnoxShellTable.getUniqueTableId(); |
| this.tableToFilter = table; |
| //inheriting the original table's call history |
| final List<KnoxShellTableCall> callHistory = KnoxShellTableCallHistory.getInstance().getCallHistory(tableToFilter.id); |
| KnoxShellTableCallHistory.getInstance().saveCalls(id, callHistory); |
| } |
| |
| public KnoxShellTableFilter name(String name) throws KnoxShellTableFilterException { |
| for (int i = 0; i < tableToFilter.headers.size(); i++) { |
| if (tableToFilter.headers.get(i).equalsIgnoreCase(name)) { |
| index = i; |
| break; |
| } |
| } |
| if (index == -1) { |
| throw new KnoxShellTableFilterException("Column name not found"); |
| } |
| return this; |
| } |
| |
| public KnoxShellTableFilter index(int index) { |
| this.index = index; |
| return this; |
| } |
| |
| // TODO: use Predicate to evaluate the Pattern.matches |
| // for regular expressions: startsWith, endsWith, contains, |
| // doesn't contain, etc |
| public KnoxShellTable regex(Comparable<String> regex) { |
| final Pattern pattern = Pattern.compile((String) regex); |
| final KnoxShellTable filteredTable = prepareFilteredTable(); |
| for (List<Comparable<?>> row : tableToFilter.rows) { |
| if (pattern.matcher(row.get(index).toString()).matches()) { |
| filteredTable.row(); |
| row.forEach(value -> { |
| filteredTable.value(value); |
| }); |
| } |
| } |
| return filteredTable; |
| } |
| |
| private KnoxShellTable prepareFilteredTable() { |
| final KnoxShellTable filteredTable = new KnoxShellTable(); |
| filteredTable.id(id); |
| filteredTable.headers.addAll(tableToFilter.headers); |
| filteredTable.title(tableToFilter.title); |
| return filteredTable; |
| } |
| |
| @SuppressWarnings("rawtypes") |
| private KnoxShellTable filter(Predicate<Comparable> p) throws KnoxShellTableFilterException { |
| try { |
| final KnoxShellTable filteredTable = prepareFilteredTable(); |
| for (List<Comparable<? extends Object>> row : tableToFilter.rows) { |
| if (p.test(row.get(index))) { |
| filteredTable.row(); // Adds a new empty row to filtered table |
| // Add each value to the row |
| row.forEach(value -> { |
| filteredTable.value(value); |
| }); |
| } |
| } |
| return filteredTable; |
| } catch (Exception e) { |
| throw new KnoxShellTableFilterException(e); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public KnoxShellTable greaterThan(Comparable<? extends Object> comparable) throws KnoxShellTableFilterException { |
| return filter(s -> s.compareTo(comparable) > 0); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public KnoxShellTable lessThan(Comparable<? extends Object> comparable) throws KnoxShellTableFilterException { |
| return filter(s -> s.compareTo(comparable) < 0); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public KnoxShellTable greaterThanOrEqualTo(Comparable<? extends Object> comparable) throws KnoxShellTableFilterException { |
| return filter(s -> s.compareTo(comparable) > 0 || s.equals(comparable)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public KnoxShellTable lessThanOrEqualTo(Comparable<? extends Object> comparable) throws KnoxShellTableFilterException { |
| return filter(s -> s.compareTo(comparable) < 0 || s.equals(comparable)); |
| } |
| |
| public KnoxShellTable equalTo(Comparable<? extends Object> comparable) throws KnoxShellTableFilterException { |
| return filter(s -> s.equals(comparable)); |
| } |
| } |