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
015package org.apache.tapestry5.internal.services.javascript;
016
017import java.util.List;
018import java.util.Map;
019
020import org.apache.tapestry5.func.F;
021import org.apache.tapestry5.ioc.util.AvailableValues;
022import org.apache.tapestry5.ioc.util.UnknownValueException;
023import org.apache.tapestry5.services.javascript.JavaScriptStack;
024import org.apache.tapestry5.services.javascript.JavaScriptStackSource;
025
026public 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}