From 35b26b52f20091a16f34ac43fa12e3da8e2dd328 Mon Sep 17 00:00:00 2001
From: Phillip Webb <pwebb@gopivotal.com>
Date: Thu, 26 Jun 2014 11:23:35 -0700
Subject: [PATCH] Add caching to JarFile.getUrl()

Fixes gh-1178
---
 .../org/springframework/boot/loader/jar/JarFile.java  | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java b/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java
index 2477d629235..7e74e1bc778 100644
--- a/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java
+++ b/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java
@@ -84,6 +84,8 @@ public class JarFile extends java.util.jar.JarFile implements Iterable<JarEntryD
 
 	private SoftReference<Manifest> manifest;
 
+	private URL url;
+
 	/**
 	 * Create a new {@link JarFile} backed by the specified file.
 	 * @param file the root jar file
@@ -417,9 +419,12 @@ public class JarFile extends java.util.jar.JarFile implements Iterable<JarEntryD
 	 * @throws MalformedURLException
 	 */
 	public URL getUrl() throws MalformedURLException {
-		Handler handler = new Handler(this);
-		String file = this.rootFile.getFile().toURI() + this.pathFromRoot + "!/";
-		return new URL("jar", "", -1, file, handler);
+		if (this.url == null) {
+			Handler handler = new Handler(this);
+			String file = this.rootFile.getFile().toURI() + this.pathFromRoot + "!/";
+			this.url = new URL("jar", "", -1, file, handler);
+		}
+		return this.url;
 	}
 
 	@Override