From 19f1b265931737a28760ccfe0200b4721f545989 Mon Sep 17 00:00:00 2001
From: Reinier Zwitserloot <reinier@tipit.to>
Date: Sun, 28 Jun 2009 05:50:51 +0200
Subject: Rolled our own ServiceLoader, because its not part of java 1.5.

---
 src/lombok/core/SpiLoadUtil.java | 63 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

(limited to 'src/lombok/core')

diff --git a/src/lombok/core/SpiLoadUtil.java b/src/lombok/core/SpiLoadUtil.java
index bf4bddf4..b26dd747 100644
--- a/src/lombok/core/SpiLoadUtil.java
+++ b/src/lombok/core/SpiLoadUtil.java
@@ -1,12 +1,75 @@
 package lombok.core;
 
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
+import java.net.URL;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import lombok.Lombok;
 
 public class SpiLoadUtil {
 	private SpiLoadUtil() {}
 	
+	public static <C> Iterator<C> findServices(Class<C> target) throws IOException {
+		return findServices(target, Thread.currentThread().getContextClassLoader());
+	}
+	
+	public static <C> Iterator<C> findServices(final Class<C> target, final ClassLoader loader) throws IOException {
+		Enumeration<URL> resources = loader.getResources("META-INF/services/" + target.getName());
+		final Set<String> entries = new LinkedHashSet<String>();
+		while ( resources.hasMoreElements() ) {
+			URL url = resources.nextElement();
+			readServicesFromUrl(entries, url);
+		}
+		
+		final Iterator<String> names = entries.iterator();
+		return new Iterator<C>() {
+			public boolean hasNext() {
+				return names.hasNext();
+			}
+			
+			public C next() {
+				try {
+					return target.cast(Class.forName(names.next(), true, loader).newInstance());
+				} catch ( Throwable t ) {
+					throw Lombok.sneakyThrow(t);
+				}
+			}
+			
+			public void remove() {
+				throw new UnsupportedOperationException();
+			}
+		};
+	}
+	
+	private static void readServicesFromUrl(Collection<String> list, URL url) throws IOException {
+		InputStream in = url.openStream();
+		try {
+			if ( in == null ) return;
+			BufferedReader r = new BufferedReader(new InputStreamReader(in, "UTF-8"));
+			while ( true ) {
+				String line = r.readLine();
+				if ( line == null ) break;
+				int idx = line.indexOf('#');
+				if ( idx != -1 ) line = line.substring(0, idx);
+				line = line.trim();
+				if ( line.length() == 0 ) continue;
+				list.add(line);
+			}
+		} finally {
+			try { in.close(); } catch ( Throwable ignore ) {}
+		}
+	}
+	
 	@SuppressWarnings("unchecked")
 	public static Class<? extends Annotation> findAnnotationClass(Class<?> c, Class<?> base) {
 		if ( c == Object.class || c == null ) return null;
-- 
cgit