Add some utility methods to ObservableView

2 files changed, 15 insertions, 6 deletions

diff --git a/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java b/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java
index 49dbf9f..eb92387 100644
--- a/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java
+++ b/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java
@@ -45,12 +45,6 @@ public final class ObservableProperty<T> implements ObservableView<T> {
 		return hasValue;
 	}
 
-	/**
-	 * {@return the value of this property}
-	 * @throws IllegalStateException if not initialized
-	 * @throws NullPointerException if the value is null and null values aren't allowed
-	 * @see #hasValue()
-	 */
 	@Override
 	public T get() {
 		if (!hasValue) {
diff --git a/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableView.java b/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableView.java
index 164f51b..8bad55c 100644
--- a/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableView.java
+++ b/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableView.java
@@ -3,6 +3,7 @@ package io.github.cottonmc.cotton.gui.widget.data;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Optional;
 import java.util.function.Supplier;
 
 /**
@@ -28,6 +29,20 @@ public interface ObservableView<T> extends Supplier<T> {
 	T get();
 
 	/**
+	 * {@return the value of this property, or null if not initialized}
+	 */
+	default @Nullable T getOrNull() {
+		return hasValue() ? get() : null;
+	}
+
+	/**
+	 * {@return the nonnull value of this property, or {@link Optional#empty()} if null or not initialized}
+	 */
+	default Optional<T> find() {
+		return Optional.ofNullable(getOrNull());
+	}
+
+	/**
 	 * Adds a change listener to this property view.
 	 *
 	 * @param listener the added listener