1 files changed, 102 insertions, 0 deletions
diff --git a/container-core/src/main/java/com/yahoo/jdisc/http/server/jetty/FilterBindings.java b/container-core/src/main/java/com/yahoo/jdisc/http/server/jetty/FilterBindings.java
new file mode 100644
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--- /dev/null
+++ b/container-core/src/main/java/com/yahoo/jdisc/http/server/jetty/FilterBindings.java
@@ -0,0 +1,102 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.jdisc.http.server.jetty;
+
+import com.yahoo.jdisc.application.BindingRepository;
+import com.yahoo.jdisc.application.BindingSet;
+import com.yahoo.jdisc.http.filter.RequestFilter;
+import com.yahoo.jdisc.http.filter.ResponseFilter;
+
+import java.net.URI;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Optional;
+import java.util.TreeMap;
+
+/**
+ * Resolves request/response filter (chain) from a {@link URI} instance.
+ *
+ * @author Oyvind Bakksjo
+ * @author bjorncs
+ */
+public class FilterBindings {
+
+    private final Map<String, RequestFilter> requestFilters;
+    private final Map<String, ResponseFilter> responseFilters;
+    private final Map<Integer, String> defaultRequestFilters;
+    private final Map<Integer, String> defaultResponseFilters;
+    private final BindingSet<String> requestFilterBindings;
+    private final BindingSet<String> responseFilterBindings;
+
+    private FilterBindings(
+            Map<String, RequestFilter> requestFilters,
+            Map<String, ResponseFilter> responseFilters,
+            Map<Integer, String> defaultRequestFilters,
+            Map<Integer, String> defaultResponseFilters,
+            BindingSet<String> requestFilterBindings,
+            BindingSet<String> responseFilterBindings) {
+        this.requestFilters = requestFilters;
+        this.responseFilters = responseFilters;
+        this.defaultRequestFilters = defaultRequestFilters;
+        this.defaultResponseFilters = defaultResponseFilters;
+        this.requestFilterBindings = requestFilterBindings;
+        this.responseFilterBindings = responseFilterBindings;
+    }
+
+    public Optional<String> resolveRequestFilter(URI uri, int localPort) {
+        String filterId = requestFilterBindings.resolve(uri);
+        if (filterId != null) return Optional.of(filterId);
+        return Optional.ofNullable(defaultRequestFilters.get(localPort));
+    }
+
+    public Optional<String> resolveResponseFilter(URI uri, int localPort) {
+        String filterId = responseFilterBindings.resolve(uri);
+        if (filterId != null) return Optional.of(filterId);
+        return Optional.ofNullable(defaultResponseFilters.get(localPort));
+    }
+
+    public RequestFilter getRequestFilter(String filterId) { return requestFilters.get(filterId); }
+
+    public ResponseFilter getResponseFilter(String filterId) { return responseFilters.get(filterId); }
+
+    public Collection<String> requestFilterIds() { return requestFilters.keySet(); }
+
+    public Collection<String> responseFilterIds() { return responseFilters.keySet(); }
+
+    public Collection<RequestFilter> requestFilters() { return requestFilters.values(); }
+
+    public Collection<ResponseFilter> responseFilters() { return responseFilters.values(); }
+
+    public static class Builder {
+        private final Map<String, RequestFilter> requestFilters = new TreeMap<>();
+        private final Map<String, ResponseFilter> responseFilters = new TreeMap<>();
+        private final Map<Integer, String> defaultRequestFilters = new TreeMap<>();
+        private final Map<Integer, String> defaultResponseFilters = new TreeMap<>();
+        private final BindingRepository<String> requestFilterBindings = new BindingRepository<>();
+        private final BindingRepository<String> responseFilterBindings = new BindingRepository<>();
+
+        public Builder() {}
+
+        public Builder addRequestFilter(String id, RequestFilter filter) { requestFilters.put(id, filter); return this; }
+
+        public Builder addResponseFilter(String id, ResponseFilter filter) { responseFilters.put(id, filter); return this; }
+
+        public Builder addRequestFilterBinding(String id, String binding) { requestFilterBindings.bind(binding, id); return this; }
+
+        public Builder addResponseFilterBinding(String id, String binding) { responseFilterBindings.bind(binding, id); return this; }
+
+        public Builder setRequestFilterDefaultForPort(String id, int port) { defaultRequestFilters.put(port, id); return this; }
+
+        public Builder setResponseFilterDefaultForPort(String id, int port) { defaultResponseFilters.put(port, id); return this; }
+
+        public FilterBindings build() {
+            return new FilterBindings(
+                    Collections.unmodifiableMap(requestFilters),
+                    Collections.unmodifiableMap(responseFilters),
+                    Collections.unmodifiableMap(defaultRequestFilters),
+                    Collections.unmodifiableMap(defaultResponseFilters),
+                    requestFilterBindings.activate(),
+                    responseFilterBindings.activate());
+        }
+    }
+}