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Commit cf96bc7

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mythzmythz
committed
Add LINQ Conversions
1 parent d2277b1 commit cf96bc7
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‎src/app/src/main/java/servicestack/net/javalinqexamples/Conversion.java

Copy file name to clipboardExpand all lines: src/app/src/main/java/servicestack/net/javalinqexamples/Conversion.java
+56Lines changed: 56 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2,8 +2,11 @@
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import com.android.internal.util.Predicate;
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5+
import java.io.Console;
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import java.util.Arrays;
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import java.util.Date;
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import java.util.List;
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import java.util.Map;
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import servicestack.net.javalinqexamples.support.Customer;
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import servicestack.net.javalinqexamples.support.Func;
@@ -19,4 +22,57 @@
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* Created by mythz on 7/26/2015.
2023
*/
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public class Conversion {
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public void linq54(){
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double[] doubles = new double[] { 1.7, 2.3, 1.9, 4.1, 2.9 };
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List<Double> sortedDoubles = orderByDesc(toList(doubles));
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Double[] doublesArray = toArray(sortedDoubles, Double.class);
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Log.d("Every other double from highest to lowest:");
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for (int d = 0; d < doublesArray.length; d += 2){
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Log.d(doublesArray[d]);
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}
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}
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public void linq55(){
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String[] words = new String[] { "cherry", "apple", "blueberry" };
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List<String> sortedWords = orderBy(words);
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List<String> wordList = toList(sortedWords);
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Log.d("The sorted word list:");
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for (String w : wordList){
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Log.d(w);
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}
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}
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public void linq56(){
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List<Tuple<String,Integer>> scoreRecords = toList(
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new Tuple<>("Alice", 50),
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new Tuple<>("Bob", 40),
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new Tuple<>("Cathy", 45)
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);
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Map<String,Tuple<String,Integer>> scoreRecordsDict = toDictionary(scoreRecords, new Function<Tuple<String, Integer>, String>() {
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@Override
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public String apply(Tuple<String, Integer> t) {
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return t.A;
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}
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});
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Log.d("Bob's score: " + scoreRecordsDict.get("Bob"));
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}
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public void linq57(){
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Object[] numbers = new Object[] { null, 1.0, "two", 3, "four", 5, "six", 7.0 };
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List<Double> doubles = ofType(toList(numbers), Double.class);
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Log.d("Numbers stored as doubles:");
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for (Double d : doubles){
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Log.d(d);
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}
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}
2278
}

‎src/app/src/main/java/servicestack/net/javalinqexamples/MainActivity.java

Copy file name to clipboardExpand all lines: src/app/src/main/java/servicestack/net/javalinqexamples/MainActivity.java
+4-4Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -49,7 +49,8 @@ protected void onCreate(Bundle savedInstanceState) {
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// Run(new Partitioning());
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// Run(new Ordering());
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// Run(new Grouping());
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Run(new SetOperators());
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// Run(new SetOperators());
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Run(new Conversion());
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}
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void Run(Object linqExamples){
@@ -62,9 +63,8 @@ void Run(Object linqExamples){
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Log.i("\n" + method.getName().toUpperCase() + ":");
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try {
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method.invoke(linqExamples);
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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} catch (InvocationTargetException e) {
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} catch (IllegalAccessException | InvocationTargetException e) {
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Log.e(e.getCause().toString());
6868
e.printStackTrace();
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}
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}

‎src/app/src/main/java/servicestack/net/javalinqexamples/support/Func.java

Copy file name to clipboardExpand all lines: src/app/src/main/java/servicestack/net/javalinqexamples/support/Func.java
+58Lines changed: 58 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2,8 +2,10 @@
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import com.android.internal.util.Predicate;
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import java.lang.reflect.Array;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.HashMap;
@@ -121,6 +123,7 @@ public static ArrayList<Double> toList(double... xs){
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return to;
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}
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@SafeVarargs
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public static <T> ArrayList<T> toList(T... xs){
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ArrayList<T> to = new ArrayList<>();
126129
for (T x : xs) {
@@ -139,6 +142,61 @@ public static <T> ArrayList<T> toList(Iterable<T> xs){
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return to;
140143
}
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public static <T> T[] toArray(Iterable<T> xs, Class<T> cls) { return toArray(toList(xs), cls);}
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@SuppressWarnings("unchecked")
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public static <T> T[] toArray(List<T> list, Class<T> cls) {
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T[] array = (T[])Array.newInstance(cls, list.size());
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return list.toArray(array);
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}
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public static <K,V> HashMap<K,V> toDictionary(K k1, V v1) {
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HashMap<K,V> to = new HashMap<>();
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to.put(k1, v1);
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return to;
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}
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public static <K,V> HashMap<K,V> toDictionary(K k1, V v1, K k2, V v2) {
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HashMap<K,V> to = new HashMap<>();
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to.put(k1, v1);
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to.put(k2, v2);
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return to;
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}
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public static <K,V> HashMap<K,V> toDictionary(K k1, V v1, K k2, V v2, K k3, V v3) {
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HashMap<K,V> to = new HashMap<>();
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to.put(k1, v1);
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to.put(k2, v2);
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to.put(k3, v3);
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return to;
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}
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public static <K,V> HashMap<K,V> toDictionary(Tuple<K,V>... xs) {
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HashMap<K,V> to = new HashMap<>();
176+
for (Tuple<K,V> x : xs){
177+
to.put(x.A, x.B);
178+
}
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return to;
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}
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public static <K, T> HashMap<K,T> toDictionary(Iterable<T> xs, Function<T,K> f) {
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HashMap<K,T> to = new HashMap<>();
184+
for (T x : xs){
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K key = f.apply(x);
186+
to.put(key, x);
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}
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return to;
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}
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public static <T> ArrayList<T> ofType(Iterable xs, Class<T> cls){
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ArrayList<T> to = new ArrayList<T>();
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for (Object x : xs){
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if (cls.isInstance(x))
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to.add((T)x);
196+
}
197+
return to;
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}
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142200
public static <T,R> ArrayList<R> map(T[] xs, Function<T,R> f) { return map(toList(xs), f); }
143201

144202
public static <T,R> ArrayList<R> map(Iterable<T> xs, Function<T,R> f) {

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