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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.databinding.impl;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import org.apache.tuscany.sca.databinding.BaseDataBinding;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
/**
* The base class for a special databinding which represents a group of other databindings
*
* @version $Rev$ $Date$
*/
public abstract class GroupDataBinding extends BaseDataBinding {
public static final String NAME = "databinding:group";
/**
* Marker type is a java class or interface representing the data format.
*/
protected Class[] markerTypes;
public GroupDataBinding(Class[] types) {
super(NAME, GroupDataBinding.class);
this.markerTypes = types;
}
@SuppressWarnings("unchecked")
@Override
public boolean introspect(DataType type, Operation operation) {
if (markerTypes == null) {
return false;
}
Type physical = type.getPhysical();
if (physical instanceof ParameterizedType) {
physical = ((ParameterizedType)physical).getRawType();
}
if (!(physical instanceof Class)) {
return false;
}
Class cls = (Class)physical;
for (Class<?> c : markerTypes) {
if (isTypeOf(c, cls)) {
type.setDataBinding(getDataBinding(c));
Object logical = getLogical(cls, null);
if (logical != null) {
type.setLogical(getLogical(cls, null));
} else {
type.setLogical(XMLType.UNKNOWN);
}
return true;
}
}
return false;
}
/**
* Test if the given type is a subtype of the base type
* @param markerType
* @param type
* @return
*/
protected boolean isTypeOf(Class<?> markerType, Class<?> type) {
return markerType.isAssignableFrom(type);
}
/**
* Derive the databinding name from a base class
* @param baseType
* @return
*/
protected String getDataBinding(Class<?> baseType) {
return baseType.getName();
}
/**
* Get the logical type
* @param type The java type
* @param operation TODO
* @return
*/
protected abstract Object getLogical(Class<?> type, Operation operation);
}
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