diff options
Diffstat (limited to 'sandbox/ant/sca/tags/2.0-M2/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultDataBindingExtensionPoint.java')
-rw-r--r-- | sandbox/ant/sca/tags/2.0-M2/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultDataBindingExtensionPoint.java | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/sandbox/ant/sca/tags/2.0-M2/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultDataBindingExtensionPoint.java b/sandbox/ant/sca/tags/2.0-M2/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultDataBindingExtensionPoint.java deleted file mode 100644 index d343fb2d46..0000000000 --- a/sandbox/ant/sca/tags/2.0-M2/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultDataBindingExtensionPoint.java +++ /dev/null @@ -1,243 +0,0 @@ -/* - * 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; - -import java.io.IOException; -import java.lang.reflect.Constructor; -import java.util.ArrayList; -import java.util.HashMap; -import java.util.List; -import java.util.Map; -import java.util.Set; -import java.util.logging.Level; -import java.util.logging.Logger; - -import org.apache.tuscany.sca.databinding.javabeans.JavaBeansDataBinding; -import org.apache.tuscany.sca.databinding.javabeans.JavaExceptionDataBinding; -import org.apache.tuscany.sca.extensibility.ServiceDeclaration; -import org.apache.tuscany.sca.extensibility.ServiceDiscovery; -import org.apache.tuscany.sca.interfacedef.DataType; -import org.apache.tuscany.sca.interfacedef.Operation; -import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl; -import org.apache.tuscany.sca.interfacedef.util.XMLType; - -/** - * The default implementation of a data binding extension point. - * - * @version $Rev$ $Date$ - */ -public class DefaultDataBindingExtensionPoint implements DataBindingExtensionPoint { - private final Map<String, DataBinding> bindings = new HashMap<String, DataBinding>(); - private final List<DataBinding> databindings = new ArrayList<DataBinding>(); - private static final Logger logger = Logger.getLogger(DefaultDataBindingExtensionPoint.class.getName()); - private boolean loadedDataBindings; - - public DefaultDataBindingExtensionPoint() { - } - - public DataBinding getDataBinding(String id) { - if (id == null) { - return null; - } - DataBinding dataBinding = bindings.get(id.toLowerCase()); - if (dataBinding == null) { - loadDataBindings(); - dataBinding = bindings.get(id.toLowerCase()); - } - return dataBinding; - } - - public void addDataBinding(DataBinding dataBinding) { - if (logger.isLoggable(Level.FINE)) { - String className = dataBinding.getClass().getName(); - boolean lazy = false; - if (dataBinding instanceof LazyDataBinding) { - className = ((LazyDataBinding)dataBinding).dataBindingDeclaration.getClassName(); - lazy = true; - } - logger.fine("Adding databinding: " + className + ";name=" + dataBinding.getName() + ",lazy=" + lazy); - } - databindings.add(dataBinding); - bindings.put(dataBinding.getName().toLowerCase(), dataBinding); - - } - - public DataBinding removeDataBinding(String id) { - if (id == null) { - return null; - } - DataBinding dataBinding = bindings.remove(id.toLowerCase()); - if (dataBinding != null) { - databindings.remove(dataBinding); - } - return dataBinding; - } - - /** - * Dynamically load data bindings declared under META-INF/services - */ - private synchronized void loadDataBindings() { - if (loadedDataBindings) - return; - - // Get the databinding service declarations - Set<ServiceDeclaration> dataBindingDeclarations; - try { - dataBindingDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(DataBinding.class.getName()); - } catch (IOException e) { - throw new IllegalStateException(e); - } - - // Load data bindings - for (ServiceDeclaration dataBindingDeclaration : dataBindingDeclarations) { - Map<String, String> attributes = dataBindingDeclaration.getAttributes(); - String name = attributes.get("name"); - - // Create a data binding wrapper and register it - DataBinding dataBinding = new LazyDataBinding(name, dataBindingDeclaration); - addDataBinding(dataBinding); - } - - loadedDataBindings = true; - } - - /** - * A data binding facade allowing data bindings to be lazily loaded and - * initialized. - */ - private static class LazyDataBinding implements DataBinding { - - private String name; - private ServiceDeclaration dataBindingDeclaration; - private DataBinding dataBinding; - - private LazyDataBinding(String type, ServiceDeclaration dataBindingDeclaration) { - this.name = type; - this.dataBindingDeclaration = dataBindingDeclaration; - } - - /** - * Load and instantiate the data binding class. - * - * @return The data binding. - */ - @SuppressWarnings("unchecked") - private DataBinding getDataBinding() { - if (dataBinding == null) { - try { - Class<DataBinding> dataBindingClass = (Class<DataBinding>)dataBindingDeclaration.loadClass(); - Constructor<DataBinding> constructor = dataBindingClass.getConstructor(); - dataBinding = constructor.newInstance(); - } catch (Exception e) { - throw new IllegalStateException(e); - } - } - return dataBinding; - } - - public Object copy(Object object, DataType dataType, Operation operation) { - return getDataBinding().copy(object, dataType, operation); - } - - public String getName() { - return name; - } - - public XMLTypeHelper getXMLTypeHelper() { - return getDataBinding().getXMLTypeHelper(); - } - - public WrapperHandler getWrapperHandler() { - return getDataBinding().getWrapperHandler(); - } - - public boolean introspect(DataType dataType, Operation operation) { - return getDataBinding().introspect(dataType, operation); - } - - public DataType introspect(Object value, Operation operation) { - return getDataBinding().introspect(value, operation); - } - } - - //FIXME The following methods should not be on the extension point - // they should be on a separate class - public boolean introspectType(DataType dataType, Operation operation) { - loadDataBindings(); - for (DataBinding binding : databindings) { - // don't introspect for JavaBeansDatabinding as all javatypes will - // anyways match to its basetype - // which is java.lang.Object. Default to this only if no databinding - // results - if (!binding.getName().equals(JavaBeansDataBinding.NAME)) { - if (binding.introspect(dataType, operation)) { - return true; - } - } - } - // FIXME: Should we honor the databinding from operation/interface - // level? - Class<?> physical = dataType.getPhysical(); - if (physical == Object.class) { - dataType.setDataBinding(JavaBeansDataBinding.NAME); - return false; - } - if (dataType.getPhysical().isArray()) { - introspectArray(dataType, operation); - return true; - } else if (Throwable.class.isAssignableFrom(physical)) { - dataType.setDataBinding(JavaExceptionDataBinding.NAME); - return true; - } else { - dataType.setDataBinding(JavaBeansDataBinding.NAME); - return false; - } - } - - private boolean introspectArray(DataType dataType, Operation operation) { - Class<?> physical = dataType.getPhysical(); - if (!physical.isArray() || physical == byte[].class) { - return false; - } - Class<?> componentType = physical.getComponentType(); - DataType logical = new DataTypeImpl(componentType, dataType.getLogical()); - introspectType(logical, operation); - dataType.setDataBinding("java:array"); - dataType.setLogical(logical); - return true; - } - - public DataType introspectType(Object value, Operation operation) { - loadDataBindings(); - DataType dataType = null; - for (DataBinding binding : databindings) { - // don't introspect for JavaBeansDatabinding as all javatypes will - // anyways match to its basetype - // which is java.lang.Object. Default to this only if no databinding - // results - if (!binding.getName().equals(JavaBeansDataBinding.NAME)) { - dataType = binding.introspect(value, operation); - } - if (dataType != null) { - return dataType; - } - } - return new DataTypeImpl<XMLType>(JavaBeansDataBinding.NAME, value.getClass(), XMLType.UNKNOWN); - } -} |