Adding support for user interface extensions.
Change-Id: I1e41d16efc11be31ad4c2fb0c09e86e3dfd26706
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/AbstractInjectionResource.java b/web/gui/src/main/java/org/onosproject/ui/impl/AbstractInjectionResource.java
new file mode 100644
index 0000000..2ed4ecd
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/AbstractInjectionResource.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.ui.impl;
+
+import org.onlab.rest.BaseResource;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+/**
+ * Resource for serving semi-static resources.
+ */
+public class AbstractInjectionResource extends BaseResource {
+
+ /**
+ * Returns the index into the supplied string where the end of the
+ * specified pattern is located.
+ *
+ * @param string string to split
+ * @param start index where to start looking for pattern
+ * @param stopPattern optional pattern where to stop
+ */
+ protected int split(String string, int start, String stopPattern) {
+ int i = stopPattern != null ? string.indexOf(stopPattern, start) : string.length();
+ checkArgument(i > 0, "Unable to locate stop pattern %s", stopPattern);
+ return i + (stopPattern != null ? stopPattern.length() : 0);
+ }
+
+ /**
+ * Produces an input stream from the bytes of the specified sub-string.
+ *
+ * @param string source string
+ * @param start index where to start stream
+ * @param end index where to end stream
+ */
+ protected InputStream stream(String string, int start, int end) {
+ return new ByteArrayInputStream(string.substring(start, end).getBytes());
+ }
+
+ /**
+ * Auxiliary enumeration to sequence input streams.
+ */
+ protected class StreamEnumeration implements Enumeration<InputStream> {
+ private final Iterator<InputStream> iterator;
+
+ StreamEnumeration(List<InputStream> streams) {
+ this.iterator = streams.iterator();
+ }
+
+ @Override
+ public boolean hasMoreElements() {
+ return iterator.hasNext();
+ }
+
+ @Override
+ public InputStream nextElement() {
+ return iterator.next();
+ }
+ }
+}