From 8377b89bfc97a85dbe90fb4cfa5dd33cd3568af4 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 21 Feb 2016 10:09:47 +0000
Subject: Add style mappings for runs

---
 .../mammoth/styles/DocumentElementMatching.java    | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/main/java/org/zwobble/mammoth/styles/DocumentElementMatching.java

(limited to 'src/main/java/org/zwobble/mammoth/styles/DocumentElementMatching.java')

diff --git a/src/main/java/org/zwobble/mammoth/styles/DocumentElementMatching.java b/src/main/java/org/zwobble/mammoth/styles/DocumentElementMatching.java
new file mode 100644
index 0000000..0ed00fc
--- /dev/null
+++ b/src/main/java/org/zwobble/mammoth/styles/DocumentElementMatching.java
@@ -0,0 +1,26 @@
+package org.zwobble.mammoth.styles;
+
+import org.zwobble.mammoth.documents.Style;
+
+import java.util.Optional;
+import java.util.function.BiPredicate;
+
+class DocumentElementMatching {
+    static boolean matchesStyle(Optional<String> styleId, Optional<String> styleName, Optional<Style> style) {
+        return matchesStyleId(styleId, style) && matchesStyleName(styleName, style);
+    }
+
+    private static boolean matchesStyleId(Optional<String> styleId, Optional<Style> style) {
+        return matches(styleId, style.map(Style::getStyleId), Object::equals);
+    }
+
+    private static boolean matchesStyleName(Optional<String> styleName, Optional<Style> style) {
+        return matches(styleName, style.flatMap(Style::getName), String::equalsIgnoreCase);
+    }
+
+    static <T> boolean matches(Optional<T> required, Optional<T> actual, BiPredicate<T, T> areEqual) {
+        return required
+            .map(requiredValue -> actual.map(actualValue -> areEqual.test(requiredValue, actualValue)).orElse(false))
+            .orElse(true);
+    }
+}
-- 
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