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/*
* Copyright (C) 2009 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 vogar.util;
//import com.google.common.collect.Lists;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Utility methods for strings.
*/
public class Strings {
private static final Pattern XML_INVALID_CHARS
= Pattern.compile("[^\\u0009\\u000A\\u000D\\u0020-\\uD7FF\\uE000-\\uFFFD]+");
public static String readStream(Reader reader) throws IOException {
StringBuilder result = new StringBuilder();
BufferedReader in = new BufferedReader(reader);
String line;
while ((line = in.readLine()) != null) {
result.append(line);
result.append('\n');
}
in.close();
return result.toString();
}
public static String readFile(File f) throws IOException {
return readStream(new InputStreamReader(new FileInputStream(f), "UTF-8"));
}
public static List<String> readFileLines(File f) throws IOException {
BufferedReader in =
new BufferedReader(new InputStreamReader(new FileInputStream(f), "UTF-8"));
List<String> list = new ArrayList<String>();
String line;
while ((line = in.readLine()) != null) {
list.add(line);
}
in.close();
return list;
}
public static String join(String delimiter, Object... objects) {
return join(Arrays.asList(objects), delimiter);
}
public static String join(Iterable<?> objects, String delimiter) {
Iterator<?> i = objects.iterator();
if (!i.hasNext()) {
return "";
}
StringBuilder result = new StringBuilder();
result.append(i.next());
while(i.hasNext()) {
result.append(delimiter).append(i.next());
}
return result.toString();
}
public static String[] objectsToStrings(Object[] objects) {
String[] result = new String[objects.length];
int i = 0;
for (Object o : objects) {
result[i++] = o.toString();
}
return result;
}
public static String[] objectsToStrings(Collection<?> objects) {
return objectsToStrings(objects.toArray());
}
/**
* Replaces XML-invalid characters with the corresponding U+XXXX code point escapes.
*/
public static String xmlSanitize(String text) {
StringBuffer result = new StringBuffer();
Matcher matcher = XML_INVALID_CHARS.matcher(text);
while (matcher.find()) {
matcher.appendReplacement(result, "");
result.append(escapeCodePoint(matcher.group()));
}
matcher.appendTail(result);
return result.toString();
}
private static String escapeCodePoint(CharSequence cs) {
StringBuilder result = new StringBuilder();
for (int i = 0; i < cs.length(); ++i) {
result.append(String.format("U+%04X", (int) cs.charAt(i)));
}
return result.toString();
}
}