| /* |
| * Copyright (C) 2018 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.tradefed.util; |
| |
| import java.util.Map; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** Utility class for escaping strings for common string manipulation. */ |
| public class StringUtil { |
| |
| /** |
| * Expand all variables in a given string with their values in the map. |
| * |
| * <pre>{@code |
| * Map<String, String> valueMap = new HashMap<>() { |
| * put("FOO", "trade"); |
| * put("BAR", "federation"); |
| * }; |
| * String str = StringUtil.expand("${FOO}.${BAR}", valueMap); |
| * assert str.equals("trade.federation"); |
| * }</pre> |
| * |
| * @param str the source {@link String} to expand |
| * @return the map with the variable names and values |
| */ |
| public static String expand(String str, Map<String, String> valueMap) { |
| final StringBuffer sb = new StringBuffer(); |
| final Pattern p = Pattern.compile("\\$\\{([^\\{\\}]+)\\}"); |
| final Matcher m = p.matcher(str); |
| while (m.find()) { |
| final String key = m.group(1); |
| final String value = valueMap.getOrDefault(key, ""); |
| m.appendReplacement(sb, Matcher.quoteReplacement(value)); |
| } |
| m.appendTail(sb); |
| return sb.toString(); |
| } |
| } |