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saguinavsaguinav
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Implements a mechanism to save the rates every time they are updated.
1 parent 45efc94 commit 7ca7800

9 files changed

Lines changed: 567 additions & 35 deletions

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‎app/build.gradle‎

Lines changed: 7 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,10 @@ buildscript {
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}
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}
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repositories {
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maven { url = "https://oss.sonatype.org/content/repositories/snapshots" }
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}
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apply plugin: 'com.android.application'
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apply plugin: 'com.neenbedankt.android-apt'
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@@ -45,6 +49,7 @@ dependencies {
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apt 'com.google.dagger:dagger-compiler:2.0'
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provided 'javax.annotation:jsr250-api:1.0'
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testCompile "junit:junit:4.12"
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testCompile "org.mockito:mockito-core:1.9.5"
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testCompile 'junit:junit:4.12'
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testCompile 'org.mockito:mockito-core:1.9.5'
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testCompile 'org.robolectric:robolectric:3.0-SNAPSHOT'
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}

‎app/src/main/java/com/anbroidsdev/converter/ObjectSharedPreferences.java‎

Lines changed: 191 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,191 @@
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package com.anbroidsdev.converter;
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import android.annotation.TargetApi;
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import android.content.SharedPreferences;
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import android.os.Build;
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import com.google.gson.Gson;
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import com.google.gson.JsonSyntaxException;
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import java.lang.reflect.Type;
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import java.util.Map;
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import java.util.Set;
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public class ObjectSharedPreferences implements SharedPreferences {
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private final SharedPreferences delegate;
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private final Editor editor;
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private final Gson gson;
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public ObjectSharedPreferences(SharedPreferences delegate) {
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this.delegate = delegate;
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this.editor = new Editor();
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this.gson = new Gson();
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}
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public class Editor implements SharedPreferences.Editor {
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protected SharedPreferences.Editor delegate;
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public Editor() {
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this.delegate = ObjectSharedPreferences.this.delegate.edit();
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}
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@Override
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public Editor putBoolean(String key, boolean value) {
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delegate.putBoolean(key, value);
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return this;
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}
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@Override
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public Editor putFloat(String key, float value) {
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delegate.putFloat(key, value);
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return this;
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}
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@Override
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public Editor putInt(String key, int value) {
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delegate.putInt(key, value);
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return this;
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}
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@Override
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public Editor putLong(String key, long value) {
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delegate.putLong(key, value);
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return this;
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}
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@Override
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public Editor putString(String key, String value) {
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delegate.putString(key, value);
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return this;
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}
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@Override
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@TargetApi(Build.VERSION_CODES.HONEYCOMB)
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public Editor putStringSet(String key, Set<String> values) {
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delegate.putStringSet(key, values);
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return this;
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}
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public <T> SharedPreferences.Editor putObject(String key, T object) {
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delegate.putString(key, object != null ? gson.toJson(object) : null);
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return this;
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}
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@Override
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public void apply() {
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delegate.apply();
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}
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@Override
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public Editor clear() {
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delegate.clear();
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return this;
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}
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@Deprecated
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/**
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*
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* @deprecated use {@link apply()} instead.
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*/
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public boolean commit() {
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delegate.apply();
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return true;
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}
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@Override
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public Editor remove(String s) {
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delegate.remove(s);
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return this;
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}
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}
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public Editor edit() {
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return editor;
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}
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@Override
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public Map<String, ?> getAll() {
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return delegate.getAll();
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}
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@Override
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public boolean getBoolean(String key, boolean defValue) {
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return delegate.getBoolean(key, defValue);
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}
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@Override
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public float getFloat(String key, float defValue) {
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return delegate.getFloat(key, defValue);
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}
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@Override
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public int getInt(String key, int defValue) {
135+
return delegate.getInt(key, defValue);
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}
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@Override
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public long getLong(String key, long defValue) {
140+
return delegate.getLong(key, defValue);
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}
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@Override
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public String getString(String key, String defValue) {
145+
return delegate.getString(key, defValue);
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}
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@Override
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@TargetApi(Build.VERSION_CODES.HONEYCOMB)
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public Set<String> getStringSet(String key, Set<String> defValues) {
151+
return delegate.getStringSet(key, defValues);
152+
}
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public <T> T getObject(String key, Class<T> theClass) {
155+
try {
156+
return gson.fromJson(delegate.getString(key, null), theClass);
157+
} catch (JsonSyntaxException e) {
158+
editor.remove(key);
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editor.apply();
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return null;
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}
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}
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public <T> T getObject(String key, Type typeOf) {
166+
try {
167+
return gson.fromJson(delegate.getString(key, null), typeOf);
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} catch (JsonSyntaxException e) {
169+
editor.remove(key);
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editor.apply();
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return null;
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}
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}
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@Override
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public boolean contains(String s) {
178+
return delegate.contains(s);
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}
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@Override
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public void registerOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener onSharedPreferenceChangeListener) {
183+
delegate.registerOnSharedPreferenceChangeListener(onSharedPreferenceChangeListener);
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}
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@Override
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public void unregisterOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener onSharedPreferenceChangeListener) {
188+
delegate.unregisterOnSharedPreferenceChangeListener(onSharedPreferenceChangeListener);
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}
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}

‎app/src/main/java/com/anbroidsdev/converter/RatesSaver.java‎

Lines changed: 12 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,12 @@
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package com.anbroidsdev.converter;
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import java.util.Currency;
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import java.util.Map;
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public interface RatesSaver {
7+
8+
public void saveRates(Map<Currency, Double> rates, long timestamp);
9+
public Map<Currency, Double> getLastSavedRates();
10+
public long getLastSavedRatesTimestamp();
11+
12+
}

app/src/main/java/com/anbroidsdev/converter/MoneyConverterRatesUpdater.java renamed to app/src/main/java/com/anbroidsdev/converter/RatesUpdater.java

Lines changed: 8 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -1,42 +1,39 @@
11
package com.anbroidsdev.converter;
22

33
import java.util.Currency;
4-
import java.util.HashMap;
54
import java.util.Map;
65

7-
public class MoneyConverterRatesUpdater {
6+
public class RatesUpdater {
87

98
public interface OnRatesUpdateListener {
109

11-
public void onRatesUpdated(Map<Currency, Double> rates, long timestamp);
10+
public void onRatesUpdated();
1211

1312
}
1413

1514
private final MoneyConverter moneyConverter;
1615
private final OpenExchangeRatesApi openExchangeRatesApi;
16+
private final RatesSaver ratesSaver;
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18-
public MoneyConverterRatesUpdater(MoneyConverter moneyConverter, OpenExchangeRatesApi openExchangeRatesApi) {
18+
public RatesUpdater(MoneyConverter moneyConverter, OpenExchangeRatesApi openExchangeRatesApi, RatesSaver ratesSaver) {
1919
this.moneyConverter = moneyConverter;
2020
this.openExchangeRatesApi = openExchangeRatesApi;
21+
this.ratesSaver = ratesSaver;
2122
}
2223

2324
public void updateRates(final OnRatesUpdateListener listener) {
2425
openExchangeRatesApi.getLatestRates(moneyConverter.getBase().getCurrencyCode(), new OpenExchangeRatesApi.OnLatestRatesCallback() {
2526

2627
@Override
2728
public void onLatestRates(Map<String, Double> rates, long timestamp) {
28-
final Map<Currency, Double> newRates = new HashMap<>(rates.size());
29+
final Map<Currency, Double> newRates = RatesUtils.ratesAsCurrencies(rates);
2930

30-
for (Map.Entry<String, Double> rate : rates.entrySet()) {
31-
try {
32-
newRates.put(Currency.getInstance(rate.getKey()), rate.getValue());
33-
} catch (IllegalArgumentException e) {}
34-
}
31+
ratesSaver.saveRates(newRates, timestamp);
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3633
moneyConverter.setRates(newRates);
3734

3835
if (listener != null) {
39-
listener.onRatesUpdated(newRates, timestamp);
36+
listener.onRatesUpdated();
4037
}
4138
}
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‎app/src/main/java/com/anbroidsdev/converter/RatesUtils.java‎

Lines changed: 39 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,39 @@
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package com.anbroidsdev.converter;
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import java.util.Currency;
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import java.util.HashMap;
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import java.util.Map;
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public class RatesUtils {
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public static Map<String, Double> ratesAsStrings(Map<Currency, Double> rates) {
10+
if (rates == null) {
11+
return null;
12+
}
13+
14+
final Map<String, Double> newRates = new HashMap<>(rates.size());
15+
16+
for (Map.Entry<Currency, Double> rate : rates.entrySet()) {
17+
newRates.put(rate.getKey().getCurrencyCode(), rate.getValue());
18+
}
19+
20+
return newRates;
21+
}
22+
23+
public static Map<Currency, Double> ratesAsCurrencies(Map<String, Double> rates) {
24+
if (rates == null) {
25+
return null;
26+
}
27+
28+
final Map<Currency, Double> newRates = new HashMap<>(rates.size());
29+
30+
for (Map.Entry<String, Double> rate : rates.entrySet()) {
31+
try {
32+
newRates.put(Currency.getInstance(rate.getKey()), rate.getValue());
33+
} catch (IllegalArgumentException e) {}
34+
}
35+
36+
return newRates;
37+
}
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39+
}

‎app/src/main/java/com/anbroidsdev/converter/SharedPreferencesRatesSaver.java‎

Lines changed: 54 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,54 @@
1+
package com.anbroidsdev.converter;
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import android.content.Context;
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import com.google.gson.reflect.TypeToken;
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import java.lang.reflect.Type;
8+
import java.util.Currency;
9+
import java.util.Map;
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11+
public class SharedPreferencesRatesSaver implements RatesSaver {
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private static final String RATES = "rates";
14+
private static final String TIMESTAMP = "timestamp";
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private static final Type TYPE = new TypeToken<Map<String, Double>>(){}.getType();
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private final ObjectSharedPreferences.Editor sharedPreferencesEditor;
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private Map<Currency, Double> lastSavedRates;
21+
private long lastSavedRatesTimestamp;
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public SharedPreferencesRatesSaver(Context context) {
24+
final ObjectSharedPreferences sharedPreferences = new ObjectSharedPreferences(context.getSharedPreferences("rates", Context.MODE_PRIVATE));
25+
this.sharedPreferencesEditor = sharedPreferences.edit();
26+
27+
lastSavedRates = RatesUtils.ratesAsCurrencies(sharedPreferences.<Map<String, Double>>getObject(RATES, TYPE));
28+
lastSavedRatesTimestamp = sharedPreferences.getLong(TIMESTAMP, 0);
29+
}
30+
31+
public void saveRates(Map<Currency, Double> rates, long timestamp) {
32+
lastSavedRates = rates;
33+
lastSavedRatesTimestamp = timestamp;
34+
35+
sharedPreferencesEditor.putObject(RATES, RatesUtils.ratesAsStrings(rates));
36+
sharedPreferencesEditor.putLong(TIMESTAMP, timestamp);
37+
sharedPreferencesEditor.apply();
38+
}
39+
40+
public Map<Currency, Double> getLastSavedRates() {
41+
return lastSavedRates;
42+
}
43+
44+
public long getLastSavedRatesTimestamp() {
45+
return lastSavedRatesTimestamp;
46+
}
47+
48+
public void clear() {
49+
sharedPreferencesEditor.remove(RATES);
50+
sharedPreferencesEditor.remove(TIMESTAMP);
51+
sharedPreferencesEditor.apply();
52+
}
53+
54+
}

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