/*
 * 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 org.apache.myfaces.resource;

/**
 * Contains the metadata information to reference a resource 
 */
public class AliasResourceMetaImpl extends ResourceMetaImpl
{
    private final String _realResourceName;
    private final boolean _couldContainValueExpressions;
    
    private String resourceIdentifier = null;

    public AliasResourceMetaImpl(String prefix, String libraryName, String libraryVersion,
            String resourceName, String resourceVersion, String realResourceName, boolean couldContainValueExpressions)
    {
        this(prefix, libraryName, libraryVersion, resourceName, resourceVersion, realResourceName, 
            couldContainValueExpressions, null);
    }
    
    public AliasResourceMetaImpl(String prefix, String libraryName, String libraryVersion,
            String resourceName, String resourceVersion, String realResourceName, 
            boolean couldContainValueExpressions, String contractName)
    {
        super(prefix, libraryName, libraryVersion,
            resourceName, resourceVersion, contractName);
        _realResourceName = realResourceName;
        _couldContainValueExpressions = couldContainValueExpressions;
    }
    
    public String getRealResourceName()
    {
        return _realResourceName;
    }
    
    @Override
    public String getResourceIdentifier()
    {
        if (resourceIdentifier == null)
        {
            StringBuilder builder = new StringBuilder();
            boolean firstSlashAdded = false;
            if (getLocalePrefix() != null && getLocalePrefix().length() > 0)
            {
                builder.append(getLocalePrefix());
                firstSlashAdded = true;
            }
            if (getLibraryName() != null)
            {
                if (firstSlashAdded)
                {
                    builder.append('/');
                }
                builder.append(getLibraryName());
                firstSlashAdded = true;
            }
            if (getLibraryVersion() != null)
            {
                if (firstSlashAdded)
                {
                    builder.append('/');
                }
                builder.append(getLibraryVersion());
                firstSlashAdded = true;
            }
            if (getRealResourceName() != null)
            {
                if (firstSlashAdded)
                {
                    builder.append('/');
                }
                builder.append(getRealResourceName());
                firstSlashAdded = true;
            }
            if (getResourceVersion() != null)
            {
                if (firstSlashAdded)
                {
                    builder.append('/');
                }
                builder.append(getResourceVersion());
                builder.append(getRealResourceName().substring(getRealResourceName().lastIndexOf('.')));
                firstSlashAdded = true;
            }
            resourceIdentifier = builder.toString();
        }
        
        return resourceIdentifier;
    }

    @Override
    public boolean couldResourceContainValueExpressions()
    {
        return _couldContainValueExpressions;
    }
}