1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Eclipse Public License, Version 1.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.eclipse.org/org/documents/epl-v10.php 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.ide.eclipse.adt.internal.wizards.templates; 17 18 import freemarker.template.SimpleScalar; 19 import freemarker.template.TemplateMethodModel; 20 import freemarker.template.TemplateModel; 21 import freemarker.template.TemplateModelException; 22 23 import java.util.List; 24 25 /** 26 * Method invoked by FreeMarker to extract letters from a string; this will remove 27 * any whitespace, punctuation and digits. 28 */ 29 public class FmExtractLettersMethod implements TemplateMethodModel { 30 @Override exec(List args)31 public TemplateModel exec(List args) throws TemplateModelException { 32 if (args.size() != 1) { 33 throw new TemplateModelException("Wrong arguments"); 34 } 35 String string = args.get(0).toString(); 36 StringBuilder sb = new StringBuilder(string.length()); 37 for (int i = 0, n = string.length(); i < n; i++) { 38 char c = string.charAt(i); 39 if (Character.isLetter(c)) { 40 sb.append(c); 41 } 42 } 43 return new SimpleScalar(sb.toString()); 44 } 45 }