| /* |
| * Copyright 2015-present Open Networking Laboratory |
| * |
| * 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 org.onosproject.ui.table.cell; |
| |
| import org.onosproject.ui.table.CellFormatter; |
| |
| /** |
| * Base implementation of a {@link CellFormatter}. This class takes care of |
| * dealing with null inputs; subclasses should implement their format method |
| * knowing that the input is guaranteed to be non-null. |
| */ |
| public abstract class AbstractCellFormatter implements CellFormatter { |
| |
| protected static final String EMPTY = ""; |
| protected static final String SLASH = "/"; |
| protected static final String QUERY = "?"; |
| protected static final String UNDERSCORE = "_"; |
| protected static final String SPACE = " "; |
| protected static final String OX = "0x"; |
| |
| |
| @Override |
| public String format(Object value) { |
| return value == null ? EMPTY : nonNullFormat(value); |
| } |
| |
| /** |
| * Formats the specified value into a string appropriate for displaying |
| * in a table cell. Note that value is guaranteed to be non-null. |
| * |
| * @param value the value |
| * @return the formatted string |
| */ |
| protected abstract String nonNullFormat(Object value); |
| } |