    001    // Copyright 2010 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    // http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.internal.services.javascript;
    016
    017    import java.util.List;
    018    import java.util.Map;
    019
    020    import org.apache.tapestry5.func.F;
    021    import org.apache.tapestry5.ioc.util.AvailableValues;
    022    import org.apache.tapestry5.ioc.util.UnknownValueException;
    023    import org.apache.tapestry5.services.javascript.JavaScriptStack;
    024    import org.apache.tapestry5.services.javascript.JavaScriptStackSource;
    025
    026    public class JavaScriptStackSourceImpl implements JavaScriptStackSource
    027    {
    028        private final Map<String, JavaScriptStack> configuration;
    029
    030        public JavaScriptStackSourceImpl(Map<String, JavaScriptStack> configuration)
    031        {
    032            this.configuration = configuration;
    033        }
    034
    035        public JavaScriptStack getStack(String name)
    036        {
    037            JavaScriptStack stack = configuration.get(name);
    038
    039            if (stack == null)
    040                throw new UnknownValueException(String.format("No JavaScriptStack with name '%s'.", name),
    041                        new AvailableValues("Configured JavaScript stacks", configuration));
    042
    043            return stack;
    044        }
    045
    046        public List<String> getStackNames()
    047        {
    048            return F.flow(configuration.keySet()).sort().toList();
    049        }
    050    }