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/*
* 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.tuscany.sca.contribution.processor;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
/**
* Default implementation of an extension point for XML schemas.
*
* @version $Rev: 632642 $ $Date: 2008-03-01 10:16:44 -0800 (Sat, 01 Mar 2008) $
*/
public class DefaultValidationSchemaExtensionPoint implements ValidationSchemaExtensionPoint {
private List<String> schemas = new ArrayList<String>();
private boolean loaded;
public void addSchema(String uri) {
schemas.add(uri);
}
public void removeSchema(String uri) {
schemas.remove(uri);
}
/**
* Load schema declarations from META-INF/services/
* org.apache.tuscany.sca.contribution.processor.ValidationSchema files
*/
private void loadSchemas() {
if (loaded)
return;
// Get the schema declarations
Set<ServiceDeclaration> schemaDeclarations;
try {
schemaDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations("org.apache.tuscany.sca.contribution.processor.ValidationSchema");
} catch (IOException e) {
throw new IllegalStateException(e);
}
// Find each schema
for (ServiceDeclaration schemaDeclaration: schemaDeclarations) {
URL url = schemaDeclaration.getResource();
if (url == null) {
throw new IllegalArgumentException(new FileNotFoundException(schemaDeclaration.getClassName()));
}
schemas.add(url.toString());
}
loaded = true;
}
public List<String> getSchemas() {
loadSchemas();
return schemas;
}
}
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