| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * 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 com.android.tools.idea.templates; |
| |
| import freemarker.template.*; |
| |
| import java.util.List; |
| |
| /** |
| * Method invoked by FreeMarker to extract letters from a string; this will remove |
| * any whitespace, punctuation and digits. |
| */ |
| public class FmExtractLettersMethod implements TemplateMethodModelEx { |
| @Override |
| public TemplateModel exec(List args) throws TemplateModelException { |
| if (args.size() != 1) { |
| throw new TemplateModelException("Wrong arguments"); |
| } |
| String string = ((TemplateScalarModel)args.get(0)).getAsString(); |
| StringBuilder sb = new StringBuilder(string.length()); |
| for (int i = 0, n = string.length(); i < n; i++) { |
| char c = string.charAt(i); |
| if (Character.isLetter(c)) { |
| sb.append(c); |
| } |
| } |
| return new SimpleScalar(sb.toString()); |
| } |
| } |