FileSignature now supports .equals and .hashCode without serialization.

Author: nedtwigg

lib/src/main/java/com/diffplug/spotless/FileSignature.java

@@ -174,6 +174,20 @@ synchronized Sig sign(File fileInput) throws IOException {
 		}
 	}
 
+	@Override
+	public boolean equals(Object other) {
+		if (other instanceof FileSignature) {
+			return Arrays.equals(signatures, ((FileSignature) other).signatures);
+		} else {
+			return false;
+		}
+	}
+
+	@Override
+	public int hashCode() {
+		return Arrays.hashCode(signatures);
+	}
+
 	@SuppressFBWarnings("SE_TRANSIENT_FIELD_NOT_RESTORED")
 	private static final class Sig implements Serializable {
 		private static final long serialVersionUID = 6727302747168655222L;
@@ -193,6 +207,21 @@ private static final class Sig implements Serializable {
 			this.hash = hash;
 			this.lastModified = lastModified;
 		}
+
+		@Override
+		public boolean equals(Object other) {
+			if (other instanceof Sig) {
+				Sig o = (Sig) other;
+				return name.equals(o.name) && size == o.size && Arrays.equals(hash, o.hash);
+			} else {
+				return false;
+			}
+		}
+
+		@Override
+		public int hashCode() {
+			return Arrays.hashCode(hash) | name.hashCode();
+		}
 	}
 
 	/** Asserts that child is a subpath of root. and returns the subpath. */