add Checked{Function, Consumer}1 and wrapper methods for Unchecked & Sneaky

src/main/java/org/jooq/lambda/Sneaky.java

@@ -16,9 +16,11 @@
 package org.jooq.lambda;
 
 
-import org.jooq.lambda.fi.util.function.*;
 import org.jooq.lambda.fi.lang.CheckedRunnable;
 import org.jooq.lambda.fi.util.CheckedComparator;
+import org.jooq.lambda.fi.util.function.*;
+import org.jooq.lambda.function.Consumer1;
+import org.jooq.lambda.function.Function1;
 
 import java.util.Comparator;
 import java.util.function.*;
@@ -233,6 +235,11 @@ public static DoubleBinaryOperator doubleBinaryOperator(CheckedDoubleBinaryOpera
         return Unchecked.doubleBinaryOperator(operator, Unchecked.RETHROW_ALL);
     }
 
+    public static <T> Consumer1<T> consumer1(CheckedConsumer1<T> consumer) {
+        return Unchecked.consumer1(consumer, Unchecked.RETHROW_ALL);
+    }
+
+
     // -----------------------------------------------------------------------------------------------------------------
     // Wrappers for java.util.function.Consumers
     // -----------------------------------------------------------------------------------------------------------------
@@ -318,6 +325,10 @@ public static <T, R> Function<T, R> function(CheckedFunction<T, R> function) {
         return Unchecked.function(function, Unchecked.RETHROW_ALL);
     }
 
+    public static <T, R> Function1<T, R> function1(CheckedFunction1<T, R> function) {
+        return Unchecked.function1(function, Unchecked.RETHROW_ALL);
+    }
+
     /**
      * Wrap a {@link CheckedToIntFunction} in a {@link ToIntFunction}.
      * <p>

src/main/java/org/jooq/lambda/Unchecked.java

@@ -16,9 +16,11 @@
 package org.jooq.lambda;
 
 
-import org.jooq.lambda.fi.util.function.*;
 import org.jooq.lambda.fi.lang.CheckedRunnable;
 import org.jooq.lambda.fi.util.CheckedComparator;
+import org.jooq.lambda.fi.util.function.*;
+import org.jooq.lambda.function.Consumer1;
+import org.jooq.lambda.function.Function1;
 
 import java.io.IOException;
 import java.io.UncheckedIOException;
@@ -653,6 +655,23 @@ public static <T> Consumer<T> consumer(CheckedConsumer<T> consumer, Consumer<Thr
         };
     }
 
+    public static <T> Consumer1<T> consumer1(CheckedConsumer1<T> consumer) {
+        return consumer1(consumer, THROWABLE_TO_RUNTIME_EXCEPTION);
+    }
+
+    public static <T> Consumer1<T> consumer1(CheckedConsumer1<T> consumer, Consumer<Throwable> handler) {
+        return t -> {
+            try {
+                consumer.accept(t);
+            }
+            catch (Throwable e) {
+                handler.accept(e);
+
+                throw new IllegalStateException("Exception handler must throw a RuntimeException", e);
+            }
+        };
+    }
+
     /**
      * Wrap a {@link CheckedIntConsumer} in a {@link IntConsumer}.
      * <p>
@@ -806,6 +825,23 @@ public static <T, R> Function<T, R> function(CheckedFunction<T, R> function) {
         return function(function, THROWABLE_TO_RUNTIME_EXCEPTION);
     }
 
+    public static <T, R> Function1<T, R> function1(CheckedFunction1<T, R> function) {
+        return function1(function, THROWABLE_TO_RUNTIME_EXCEPTION);
+    }
+
+    public static <T, R> Function1<T, R> function1(CheckedFunction1<T, R> function, Consumer<Throwable> handler) {
+        return t -> {
+            try {
+                return function.apply(t);
+            }
+            catch (Throwable e) {
+                handler.accept(e);
+
+                throw new IllegalStateException("Exception handler must throw a RuntimeException", e);
+            }
+        };
+    }
+
     /**
      * Wrap a {@link CheckedFunction} in a {@link Function} with a custom handler for checked exceptions.
      * <p>

src/main/java/org/jooq/lambda/fi/util/function/CheckedConsumer1.java

@@ -0,0 +1,59 @@
+/**
+ * Copyright (c) 2014-2016, Data Geekery GmbH, [email protected]
+ *
+ * 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
+ * 
+ *     https://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 org.jooq.lambda.fi.util.function;
+
+import org.jooq.lambda.Sneaky;
+import org.jooq.lambda.Unchecked;
+import org.jooq.lambda.function.Consumer1;
+
+import java.util.function.Consumer;
+
+/**
+ * A {@link Consumer} that allows for checked exceptions.
+ *
+ * @author Lukas Eder
+ */
+@FunctionalInterface
+public interface CheckedConsumer1<T> {
+
+    /**
+     * Performs this operation on the given argument.
+     *
+     * @param t the input argument
+     */
+    void accept(T t) throws Throwable;
+
+    /**
+     * @see {@link Sneaky#consumer1(CheckedConsumer1)}
+     */
+    static <T> Consumer1<T> sneaky(CheckedConsumer1<T> consumer) {
+        return Sneaky.consumer1(consumer);
+    }
+
+    /**
+     * @see {@link Unchecked#consumer1(CheckedConsumer1)}
+     */
+    static <T> Consumer1<T> unchecked(CheckedConsumer1<T> consumer) {
+        return Unchecked.consumer1(consumer);
+    }
+
+    /**
+     * @see {@link Unchecked#consumer1(CheckedConsumer1, Consumer)}
+     */
+    static <T> Consumer1<T> unchecked(CheckedConsumer1<T> consumer, Consumer<Throwable> handler) {
+        return Unchecked.consumer1(consumer, handler);
+    }
+}

src/main/java/org/jooq/lambda/fi/util/function/CheckedFunction1.java

@@ -0,0 +1,61 @@
+/**
+ * Copyright (c) 2014-2016, Data Geekery GmbH, [email protected]
+ *
+ * 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
+ * 
+ *     https://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 org.jooq.lambda.fi.util.function;
+
+import org.jooq.lambda.Sneaky;
+import org.jooq.lambda.Unchecked;
+import org.jooq.lambda.function.Function1;
+
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * A {@link Function} that allows for checked exceptions.
+ *
+ * @author Lukas Eder
+ */
+@FunctionalInterface
+public interface CheckedFunction1<T, R> {
+
+    /**
+     * Applies this function to the given argument.
+     *
+     * @param t the function argument
+     * @return the function result
+     */
+    R apply(T t) throws Throwable;
+
+    /**
+     * @see {@link Sneaky#function1(CheckedFunction1)}
+     */
+    static <T, R> Function1<T, R> sneaky(CheckedFunction1<T, R> function) {
+        return Sneaky.function1(function);
+    }
+
+    /**
+     * @see {@link Unchecked#function1(CheckedFunction1)}
+     */
+    static <T, R> Function1<T, R> unchecked(CheckedFunction1<T, R> function) {
+        return Unchecked.function1(function);
+    }
+
+    /**
+     * @see {@link Unchecked#function1(CheckedFunction1, Consumer)}
+     */
+    static <T, R> Function1<T, R> unchecked(CheckedFunction1<T, R> function, Consumer<Throwable> handler) {
+        return Unchecked.function1(function, handler);
+    }
+}

src/test/java/org/jooq/lambda/fi/util/function/CheckedFunction1Test.java

@@ -0,0 +1,40 @@
+package org.jooq.lambda.fi.util.function;
+
+import org.jooq.lambda.Seq;
+import org.jooq.lambda.Unchecked;
+import org.jooq.lambda.UncheckedException;
+import org.junit.Test;
+
+import java.util.stream.Collectors;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+public class CheckedFunction1Test {
+
+    private String throwingFunction(boolean shouldThrow) throws Exception {
+        if (shouldThrow) {
+            throw new Exception("I fail on purpose");
+        } else {
+            return "OK";
+        }
+    }
+
+    @Test
+    public void uncheckedHappyPath() throws Exception {
+        Seq.of(false)
+                .map(Unchecked.function1(this::throwingFunction))
+                .collect(Collectors.toSet());
+    }
+
+    @Test
+    public void uncheckedUnhappyPath() throws Exception {
+        try {
+            Seq.of(true).map(Unchecked.function1(this::throwingFunction)).collect(Collectors.toSet());
+            fail("RuntimeException was expected to be thrown");
+        } catch (RuntimeException ex) {
+            assertTrue(ex instanceof UncheckedException);
+            assertTrue(ex.getMessage().equals("java.lang.Exception: I fail on purpose"));
+        }
+    }
+}