Added null checks.

andreaskumlehn · andreaskumlehn · commit cf9a759f50b1 · 2014-05-19T09:35:59.000+02:00
diff --git a/src/main/java/difflib/DiffRowGenerator.java b/src/main/java/difflib/DiffRowGenerator.java
@@ -77,6 +77,8 @@ public static class Builder {
         private Equalizer<String> stringEqualizer = new Equalizer<String>() {
             public boolean equals(String original, String revised) {
                 if (ignoreWhiteSpaces) {
+                    original = original == null ? "" : original;
+                    revised = revised == null ? "" : revised;
                     original = original.trim().replaceAll("\\s+", " ");
                     revised = revised.trim().replaceAll("\\s+", " ");
                 }

Original file line number	Diff line number	Diff line change
`@@ -77,6 +77,8 @@ public static class Builder {`
`77`	`77`	`private Equalizer<String> stringEqualizer = new Equalizer<String>() {`
`78`	`78`	`public boolean equals(String original, String revised) {`
`79`	`79`	`if (ignoreWhiteSpaces) {`
	`80`	`+ original = original == null ? "" : original;`
	`81`	`+ revised = revised == null ? "" : revised;`
`80`	`82`	`original = original.trim().replaceAll("\\s+", " ");`
`81`	`83`	`revised = revised.trim().replaceAll("\\s+", " ");`
`82`	`84`	`}`