Forgot to add new file from last commit for FELIX-4493.


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1589848 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/resolver/src/main/java/org/apache/felix/resolver/FelixResolveContext.java b/resolver/src/main/java/org/apache/felix/resolver/FelixResolveContext.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.felix.resolver;
+
+import java.util.Collection;
+import org.osgi.resource.Resource;
+
+public interface FelixResolveContext {
+
+	/**
+	 * Return the resources that the resolver should attempt to resolve on
+	 * demand for specified resource which is being resolved. Inability to 
+	 * resolve one of the on demand resources will not result in a 
+	 * resolution exception.
+	 * 
+	 * <p>
+	 * The resolver will ask for on demand resources for each resource that 
+	 * is getting pulled into a resolve operation.
+	 * An example of an on demand resource is a fragment.  When a host
+	 * is being resolved the resolve context will be asked if any additional
+	 * resources should be added to the resolve operation.  The resolve context
+	 * may decide that the potential fragments of the host should be resolved
+	 * along with the host.
+	 * 
+	 * @return A collection of the resources that the resolver should attempt to
+	 *         resolve for this resolve context. May be empty if there are no
+	 *         on demand resources. The returned collection may be unmodifiable.
+	 */
+	public Collection<Resource> getOndemandResources(Resource host);
+}