Code maintenace and changes

1 files changed, 100 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/funcdata/TransformedValueMap.java b/BJC-Utils2/src/main/java/bjc/utils/funcdata/TransformedValueMap.java
new file mode 100644
index 0000000..75557fa
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/funcdata/TransformedValueMap.java
@@ -0,0 +1,100 @@
+package bjc.utils.funcdata;
+
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * A map that transforms values from one type to another
+ * 
+ * @author ben
+ *
+ * @param <OldKey>
+ *            The type of the map's keys
+ * @param <OldValue>
+ *            The type of the map's values
+ * @param <NewValue>
+ *            The type of the transformed values
+ */
+final class TransformedValueMap<OldKey, OldValue, NewValue>
+		implements IFunctionalMap<OldKey, NewValue> {
+	private IFunctionalMap<OldKey, OldValue>	mapToTransform;
+	private Function<OldValue, NewValue>		transformer;
+
+	public TransformedValueMap(IFunctionalMap<OldKey, OldValue> destMap,
+			Function<OldValue, NewValue> transform) {
+		mapToTransform = destMap;
+		transformer = transform;
+	}
+
+	@Override
+	public NewValue get(OldKey key) {
+		return transformer.apply(mapToTransform.get(key));
+	}
+
+	@Override
+	public boolean containsKey(OldKey key) {
+		return mapToTransform.containsKey(key);
+	}
+
+	@Override
+	public String toString() {
+		return mapToTransform.toString();
+	}
+
+	@Override
+	public NewValue put(OldKey key, NewValue val) {
+		throw new UnsupportedOperationException(
+				"Can't add items to transformed map");
+	}
+
+	@Override
+	public <MappedValue> IFunctionalMap<OldKey, MappedValue> mapValues(
+			Function<NewValue, MappedValue> transform) {
+		return new TransformedValueMap<>(this, transform);
+	}
+
+	@Override
+	public IFunctionalList<OldKey> keyList() {
+		return mapToTransform.keyList();
+	}
+
+	@Override
+	public void forEach(BiConsumer<OldKey, NewValue> action) {
+		mapToTransform.forEach((key, val) -> {
+			action.accept(key, transformer.apply(val));
+		});
+	}
+
+	@Override
+	public NewValue remove(OldKey key) {
+		return transformer.apply(mapToTransform.remove(key));
+	}
+
+	@Override
+	public int getSize() {
+		return mapToTransform.getSize();
+	}
+
+	@Override
+	public void forEachKey(Consumer<OldKey> action) {
+		mapToTransform.forEachKey(action);
+	}
+
+	@Override
+	public void forEachValue(Consumer<NewValue> action) {
+		mapToTransform.forEachValue((val) -> {
+			action.accept(transformer.apply(val));
+		});
+	}
+
+	@Override
+	public IFunctionalList<NewValue> valueList() {
+		return mapToTransform.valueList().map(transformer);
+	}
+
+	@Override
+	public IFunctionalMap<OldKey, NewValue> extend() {
+		return new ExtendedMap<>(this, new FunctionalMap<>());
+	}
+}
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