| /** |
| * 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.apex.malhar.contrib.misc.streamquery.condition; |
| |
| import java.util.Map; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import javax.validation.constraints.NotNull; |
| |
| import org.apache.apex.malhar.lib.streamquery.condition.Condition; |
| |
| /** |
| * An implementation of condition class to filter rows for which given column name value matches given regular expression. <br> |
| *<p> |
| *<b> Properties : </b> <br> |
| *<b> column : < /b> Column to be matched with regular expression. <br> |
| *<b> pattern : </b> Regular expression pattern.<br> |
| * @displayName Like Condition |
| * @category Stream Manipulators |
| * @tags sql, like condition, regular expression |
| * @since 0.3.4 |
| * @deprecated |
| */ |
| @Deprecated |
| public class LikeCondition extends Condition |
| { |
| /** |
| * Column to be matched with regular expression. |
| */ |
| @NotNull |
| private String column; |
| |
| /** |
| * Regular expression pattern. |
| */ |
| @NotNull |
| private Pattern pattern; |
| |
| /** |
| * @param column Column to be matched with regular expression, must be non-null. |
| * @param pattern Regular expression pattern, must be non-null. |
| */ |
| public LikeCondition(@NotNull String column,@NotNull String pattern) |
| { |
| setColumn(column); |
| setPattern(pattern); |
| } |
| |
| /** |
| * For valid row column value string must match regular expression. |
| * @return row valid status. |
| */ |
| @Override |
| public boolean isValidRow(Map<String, Object> row) |
| { |
| if (!row.containsKey(column)) { |
| return false; |
| } |
| Matcher match = pattern.matcher((CharSequence)row.get(column)); |
| return match.find(); |
| } |
| |
| /** |
| * Must not be called. |
| */ |
| @Override |
| public boolean isValidJoin(Map<String, Object> row1, Map<String, Object> row2) |
| { |
| assert (false); |
| return false; |
| } |
| |
| public String getColumn() |
| { |
| return column; |
| } |
| |
| public void setColumn(String column) |
| { |
| this.column = column; |
| } |
| |
| public void setPattern(String pattern) |
| { |
| this.pattern = Pattern.compile(pattern); |
| } |
| |
| } |