001// Licensed under the Apache License, Version 2.0 (the "License");
002// you may not use this file except in compliance with the License.
003// You may obtain a copy of the License at
004//
005// http://www.apache.org/licenses/LICENSE-2.0
006//
007// Unless required by applicable law or agreed to in writing, software
008// distributed under the License is distributed on an "AS IS" BASIS,
009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
010// See the License for the specific language governing permissions and
011// limitations under the License.
012
013package org.apache.tapestry5.internal.services.javascript;
014
015import org.apache.tapestry5.Asset;
016import org.apache.tapestry5.commons.Resource;
017import org.apache.tapestry5.commons.util.AvailableValues;
018import org.apache.tapestry5.commons.util.UnknownValueException;
019import org.apache.tapestry5.func.F;
020import org.apache.tapestry5.services.javascript.JavaScriptStack;
021import org.apache.tapestry5.services.javascript.JavaScriptStackSource;
022
023import java.util.List;
024import java.util.Map;
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 = findStack(name);
038
039        if (stack == null)
040        {
041            throw new UnknownValueException(String.format("No JavaScriptStack with name '%s'.", name),
042                    new AvailableValues("Configured JavaScript stacks", configuration));
043        }
044
045        return stack;
046    }
047
048    public JavaScriptStack findStack(String name)
049    {
050        return configuration.get(name);
051    }
052
053    public List<String> getStackNames()
054    {
055        return F.flow(configuration.keySet()).sort().toList();
056    }
057
058    @Override
059    public JavaScriptStack findStackForJavaScriptLibrary(Resource resource)
060    {
061        for (JavaScriptStack stack : configuration.values())
062        {
063            for (Asset libraryAsset : stack.getJavaScriptLibraries())
064            {
065                if (libraryAsset.getResource().equals(resource))
066                {
067                    return stack;
068                }
069            }
070        }
071
072        return null;
073    }
074}