    001// Copyright 2007, 2008, 2011 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;
    016
    017import org.apache.tapestry5.Block;
    018import org.apache.tapestry5.services.BeanBlockContribution;
    019import org.apache.tapestry5.services.BeanBlockOverrideSource;
    020import org.apache.tapestry5.services.BeanBlockSource;
    021
    022import java.util.Collection;
    023
    024public class BeanBlockSourceImpl implements BeanBlockSource
    025{
    026    // This is checked before masterSource
    027    private final BeanBlockOverrideSource overrideSource;
    028
    029    private final BeanBlockOverrideSource masterSource;
    030
    031    public BeanBlockSourceImpl(RequestPageCache pageCache,
    032                               BeanBlockOverrideSource overrideSource, Collection<BeanBlockContribution> configuration)
    033    {
    034        this.overrideSource = overrideSource;
    035        masterSource = new BeanBlockOverrideSourceImpl(pageCache, configuration);
    036    }
    037
    038    public boolean hasDisplayBlock(String datatype)
    039    {
    040        return overrideSource.hasDisplayBlock(datatype) || masterSource.hasDisplayBlock(datatype);
    041    }
    042
    043    public Block getDisplayBlock(String datatype)
    044    {
    045        Block result = overrideSource.getDisplayBlock(datatype);
    046
    047        if (result == null)
    048            result = masterSource.getDisplayBlock(datatype);
    049
    050        if (result == null)
    051            throw new RuntimeException(String.format("There is no defined way to display data of type '%s'. Make a contribution to the BeanBlockSource service for this type.", datatype));
    052
    053        return result;
    054    }
    055
    056    public Block getEditBlock(String datatype)
    057    {
    058        Block result = overrideSource.getEditBlock(datatype);
    059
    060        if (result == null)
    061            result = masterSource.getEditBlock(datatype);
    062
    063        if (result == null)
    064            throw new RuntimeException(String.format("There is no defined way to edit data of type '%s'.  Make a contribution to the BeanBlockSource service for this type.", datatype));
    065
    066        return result;
    067    }
    068
    069}