| /* |
| * Copyright (C) 2015 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 android.util; |
| |
| import android.text.TextUtils; |
| |
| /** |
| * Parses a list of key=value pairs, separated by some delimiter, and puts the results in |
| * an internal Map. Values can be then queried by key, or if not found, a default value |
| * can be used. |
| * @hide |
| */ |
| public class KeyValueListParser { |
| private final ArrayMap<String, String> mValues = new ArrayMap<>(); |
| private final TextUtils.StringSplitter mSplitter; |
| |
| /** |
| * Constructs a new KeyValueListParser. This can be reused for different strings |
| * by calling {@link #setString(String)}. |
| * @param delim The delimiter that separates key=value pairs. |
| */ |
| public KeyValueListParser(char delim) { |
| mSplitter = new TextUtils.SimpleStringSplitter(delim); |
| } |
| |
| /** |
| * Resets the parser with a new string to parse. The string is expected to be in the following |
| * format: |
| * <pre>key1=value,key2=value,key3=value</pre> |
| * |
| * where the delimiter is a comma. |
| * |
| * @param str the string to parse. |
| * @throws IllegalArgumentException if the string is malformed. |
| */ |
| public void setString(String str) throws IllegalArgumentException { |
| mValues.clear(); |
| if (str != null) { |
| mSplitter.setString(str); |
| for (String pair : mSplitter) { |
| int sep = pair.indexOf('='); |
| if (sep < 0) { |
| mValues.clear(); |
| throw new IllegalArgumentException( |
| "'" + pair + "' in '" + str + "' is not a valid key-value pair"); |
| } |
| mValues.put(pair.substring(0, sep).trim(), pair.substring(sep + 1).trim()); |
| } |
| } |
| } |
| |
| /** |
| * Get the value for key as a long. |
| * @param key The key to lookup. |
| * @param def The value to return if the key was not found, or the value was not a long. |
| * @return the long value associated with the key. |
| */ |
| public long getLong(String key, long def) { |
| String value = mValues.get(key); |
| if (value != null) { |
| try { |
| return Long.parseLong(value); |
| } catch (NumberFormatException e) { |
| // fallthrough |
| } |
| } |
| return def; |
| } |
| |
| /** |
| * Get the value for key as a float. |
| * @param key The key to lookup. |
| * @param def The value to return if the key was not found, or the value was not a float. |
| * @return the float value associated with the key. |
| */ |
| public float getFloat(String key, float def) { |
| String value = mValues.get(key); |
| if (value != null) { |
| try { |
| return Float.parseFloat(value); |
| } catch (NumberFormatException e) { |
| // fallthrough |
| } |
| } |
| return def; |
| } |
| |
| /** |
| * Get the value for key as a string. |
| * @param key The key to lookup. |
| * @param def The value to return if the key was not found. |
| * @return the string value associated with the key. |
| */ |
| public String getString(String key, String def) { |
| String value = mValues.get(key); |
| if (value != null) { |
| return value; |
| } |
| return def; |
| } |
| } |