| /* |
| * 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.commons.mail.resolver; |
| |
| import org.apache.commons.mail.DataSourceResolver; |
| |
| import javax.activation.DataSource; |
| import java.io.IOException; |
| |
| /** |
| * A composite data source resolver. It allows to resolve data sources coming from |
| * multiple locations such as the classpath, the file system or an URL. |
| * |
| * @since 1.3 |
| */ |
| public class DataSourceCompositeResolver extends DataSourceBaseResolver |
| { |
| /** the list of resolvers */ |
| private final DataSourceResolver[] dataSourceResolvers; |
| |
| /** |
| * Constructor. |
| * |
| * @param dataSourceResolvers a list of of resolvers being used |
| */ |
| public DataSourceCompositeResolver(final DataSourceResolver[] dataSourceResolvers) |
| { |
| this.dataSourceResolvers = new DataSourceResolver[dataSourceResolvers.length]; |
| System.arraycopy(dataSourceResolvers, 0, this.dataSourceResolvers, 0, dataSourceResolvers.length); |
| } |
| |
| /** |
| * Constructor. |
| * |
| * @param dataSourceResolvers a list of of resolvers being used |
| * @param isLenient shall we ignore resources not found or throw an exception? |
| */ |
| public DataSourceCompositeResolver(final DataSourceResolver[] dataSourceResolvers, final boolean isLenient) |
| { |
| super(isLenient); |
| this.dataSourceResolvers = new DataSourceResolver[dataSourceResolvers.length]; |
| System.arraycopy(dataSourceResolvers, 0, this.dataSourceResolvers, 0, dataSourceResolvers.length); |
| } |
| |
| /** |
| * Get the underlying data source resolvers. |
| * |
| * @return underlying data source resolvers |
| */ |
| public DataSourceResolver[] getDataSourceResolvers() |
| { |
| // clone the internal array to prevent external modification (see EMAIL-116) |
| final DataSourceResolver[] resolvers = new DataSourceResolver[dataSourceResolvers.length]; |
| System.arraycopy(dataSourceResolvers, 0, resolvers, 0, dataSourceResolvers.length); |
| return resolvers; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public DataSource resolve(final String resourceLocation) throws IOException |
| { |
| final DataSource result = resolve(resourceLocation, true); |
| |
| if (isLenient() || result != null) |
| { |
| return result; |
| } |
| throw new IOException("The following resource was not found : " + resourceLocation); |
| |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public DataSource resolve(final String resourceLocation, final boolean isLenient) throws IOException |
| { |
| for (int i = 0; i < getDataSourceResolvers().length; i++) |
| { |
| final DataSourceResolver dataSourceResolver = getDataSourceResolvers()[i]; |
| final DataSource dataSource = dataSourceResolver.resolve(resourceLocation, isLenient); |
| |
| if (dataSource != null) |
| { |
| return dataSource; |
| } |
| } |
| |
| if (isLenient) |
| { |
| return null; |
| } |
| throw new IOException("The following resource was not found : " + resourceLocation); |
| } |
| } |