Github user mikezaccardo commented on a diff in the pull request:
https://github.com/apache/incubator-brooklyn/pull/714#discussion_r33172710
--- Diff: core/src/main/java/brooklyn/util/flags/MethodCoercions.java ---
@@ -0,0 +1,183 @@
+/*
+ * 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 brooklyn.util.flags;
+
+import brooklyn.util.exceptions.Exceptions;
+import brooklyn.util.guava.Maybe;
+import com.google.common.base.Optional;
+import com.google.common.base.Predicate;
+import com.google.common.collect.Iterables;
+import com.google.common.reflect.TypeToken;
+
+import javax.annotation.Nullable;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * A way of binding a loosely-specified method call into a strongly-typed
Java method call.
+ */
+public class MethodCoercions {
+
+ /**
+ * Returns a predicate that matches a method with the given name, and
a single parameter that
+ * {@link brooklyn.util.flags.TypeCoercions#tryCoerce(Object,
com.google.common.reflect.TypeToken)} can process
+ * from the given argument.
+ *
+ * @param methodName name of the method
+ * @param argument argument that is intended to be given
+ * @return a predicate that will match a compatible method
+ */
+ public static Predicate<Method> matchSingleParameterMethod(final
String methodName, final Object argument) {
--- End diff --
Could be good to add `@Nonnull` to the params.
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