Add warnings to results

1 files changed, 44 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/mammoth/results/Result.java b/src/main/java/org/zwobble/mammoth/results/Result.java
new file mode 100644
index 0000000..846841e
--- /dev/null
+++ b/src/main/java/org/zwobble/mammoth/results/Result.java
@@ -0,0 +1,44 @@
+package org.zwobble.mammoth.results;
+
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+import java.util.function.Function;
+
+import static org.zwobble.mammoth.util.MammothLists.list;
+
+public class Result<T> {
+    public static <T> Result<List<T>> concat(Iterable<Result<T>> results) {
+        ImmutableList.Builder<T> elements = ImmutableList.builder();
+        ImmutableList.Builder<Warning> warnings = ImmutableList.builder();
+        for (Result<T> result : results) {
+            elements.add(result.value);
+            warnings.addAll(result.warnings);
+        }
+        return new Result<>(elements.build(), warnings.build());
+    }
+
+    public static <T> Result<T> success(T value) {
+        return new Result<>(value, list());
+    }
+
+    private final T value;
+    private final List<Warning> warnings;
+
+    public Result(T value, List<Warning> warnings) {
+        this.value = value;
+        this.warnings = warnings;
+    }
+
+    public T getValue() {
+        return value;
+    }
+
+    public List<Warning> getWarnings() {
+        return warnings;
+    }
+
+    public <R> Result<R> map(Function<T, R> function) {
+        return new Result<>(function.apply(value), warnings);
+    }
+}