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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
*
* 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.ide.eclipse.adt.internal.wizards.templates;
import freemarker.template.SimpleScalar;
import freemarker.template.TemplateMethodModel;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
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 TemplateMethodModel {
@Override
public TemplateModel exec(List args) throws TemplateModelException {
if (args.size() != 1) {
throw new TemplateModelException("Wrong arguments");
}
String string = args.get(0).toString();
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());
}
}
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