1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
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
17
18package android.filterfw.core;
19
20import java.io.StringWriter;
21import java.util.HashMap;
22import java.util.Map;
23
24/**
25 * @hide
26 */
27public class KeyValueMap extends HashMap<String, Object> {
28
29    public void setKeyValues(Object... keyValues) {
30        if (keyValues.length % 2 != 0) {
31            throw new RuntimeException("Key-Value arguments passed into setKeyValues must be "
32            + "an alternating list of keys and values!");
33        }
34        for (int i = 0; i < keyValues.length; i += 2) {
35            if (!(keyValues[i] instanceof String)) {
36                throw new RuntimeException("Key-value argument " + i + " must be a key of type "
37                    + "String, but found an object of type " + keyValues[i].getClass() + "!");
38            }
39            String key = (String)keyValues[i];
40            Object value = keyValues[i+1];
41            put(key, value);
42        }
43    }
44
45    public static KeyValueMap fromKeyValues(Object... keyValues) {
46        KeyValueMap result = new KeyValueMap();
47        result.setKeyValues(keyValues);
48        return result;
49    }
50
51    public String getString(String key) {
52        Object result = get(key);
53        return result != null ? (String)result : null;
54    }
55
56    public int getInt(String key) {
57        Object result = get(key);
58        return result != null ? (Integer)result : null;
59    }
60
61    public float getFloat(String key) {
62        Object result = get(key);
63        return result != null ? (Float)result : null;
64    }
65
66    @Override
67    public String toString() {
68        StringWriter writer = new StringWriter();
69        for (Map.Entry<String, Object> entry : entrySet()) {
70            String valueString;
71            Object value = entry.getValue();
72            if (value instanceof String) {
73                valueString = "\"" + value + "\"";
74            } else {
75                valueString = value.toString();
76            }
77            writer.write(entry.getKey() + " = " + valueString + ";\n");
78        }
79        return writer.toString();
80    }
81
82}
83