diff options
Diffstat (limited to 'sandbox/mobile-android/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/transformers/Output2OutputTransformer.java')
| -rw-r--r-- | sandbox/mobile-android/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/transformers/Output2OutputTransformer.java | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/sandbox/mobile-android/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/transformers/Output2OutputTransformer.java b/sandbox/mobile-android/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/transformers/Output2OutputTransformer.java new file mode 100644 index 0000000000..7fed2e5eaa --- /dev/null +++ b/sandbox/mobile-android/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/transformers/Output2OutputTransformer.java @@ -0,0 +1,203 @@ +/*
+ * 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.core.databinding.transformers;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.databinding.DataBinding;
+import org.apache.tuscany.sca.databinding.Mediator;
+import org.apache.tuscany.sca.databinding.PullTransformer;
+import org.apache.tuscany.sca.databinding.TransformationContext;
+import org.apache.tuscany.sca.databinding.TransformationException;
+import org.apache.tuscany.sca.databinding.WrapperHandler;
+import org.apache.tuscany.sca.databinding.impl.BaseTransformer;
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.util.ElementInfo;
+import org.apache.tuscany.sca.interfacedef.util.WrapperInfo;
+import org.apache.tuscany.sca.interfacedef.util.XMLType;
+import org.osoa.sca.annotations.Reference;
+
+/**
+ * This is a special transformer to transform the output from one IDL to the
+ * other one
+ */
+public class Output2OutputTransformer extends BaseTransformer<Object, Object> implements
+ PullTransformer<Object, Object> {
+
+ protected Mediator mediator;
+
+ /**
+ * @param wrapperHandler
+ */
+ public Output2OutputTransformer() {
+ super();
+ }
+
+ /**
+ * @param mediator the mediator to set
+ */
+ @Reference
+ public void setMediator(Mediator mediator) {
+ this.mediator = mediator;
+ }
+
+ @Override
+ public String getSourceDataBinding() {
+ return DataBinding.IDL_OUTPUT;
+ }
+
+ @Override
+ public String getTargetDataBinding() {
+ return DataBinding.IDL_OUTPUT;
+ }
+
+ /**
+ * @see org.apache.tuscany.sca.databinding.impl.BaseTransformer#getSourceType()
+ */
+ @Override
+ protected Class getSourceType() {
+ return Object.class;
+ }
+
+ /**
+ * @see org.apache.tuscany.sca.databinding.impl.BaseTransformer#getTargetType()
+ */
+ @Override
+ protected Class getTargetType() {
+ return Object.class;
+ }
+
+ /**
+ * @see org.apache.tuscany.sca.databinding.Transformer#getWeight()
+ */
+ @Override
+ public int getWeight() {
+ return 10;
+ }
+
+ private String getDataBinding(Operation operation) {
+ return operation.getDataBinding();
+ }
+
+ private WrapperHandler getWrapperHandler(String dataBindingId, boolean required) {
+ WrapperHandler wrapperHandler = null;
+ if (dataBindingId != null) {
+ DataBinding dataBinding = mediator.getDataBindings().getDataBinding(dataBindingId);
+ wrapperHandler = dataBinding == null ? null : dataBinding.getWrapperHandler();
+ }
+ if (wrapperHandler == null && required) {
+ throw new TransformationException("No wrapper handler is provided for databinding: " + dataBindingId);
+ }
+ return wrapperHandler;
+ }
+
+ @SuppressWarnings("unchecked")
+ public Object transform(Object response, TransformationContext context) {
+ try {
+ DataType<DataType> sourceType = context.getSourceDataType();
+ Operation sourceOp = context.getSourceOperation();
+ boolean sourceWrapped = sourceOp != null && sourceOp.isWrapperStyle();
+
+ WrapperHandler sourceWrapperHandler = null;
+ String sourceDataBinding = getDataBinding(sourceOp);
+ sourceWrapperHandler = getWrapperHandler(sourceDataBinding, sourceWrapped);
+
+ DataType<DataType> targetType = context.getTargetDataType();
+ Operation targetOp = (Operation)context.getTargetOperation();
+ boolean targetWrapped = targetOp != null && targetOp.isWrapperStyle();
+ WrapperHandler targetWrapperHandler = null;
+ String targetDataBinding = getDataBinding(targetOp);
+ targetWrapperHandler = getWrapperHandler(targetDataBinding, targetWrapped);
+
+ if ((!sourceWrapped) && targetWrapped) {
+ // Unwrapped --> Wrapped
+ WrapperInfo wrapper = targetOp.getWrapper();
+ ElementInfo wrapperElement = wrapper.getOutputWrapperElement();
+ List<ElementInfo> childElements = wrapper.getOutputChildElements();
+
+ // If the source can be wrapped, wrapped it first
+ if (sourceWrapperHandler != null) {
+ DataType sourceWrapperType =
+ sourceWrapperHandler.getWrapperType(wrapperElement, childElements, context);
+ if (sourceWrapperType != null) {
+ Object sourceWrapper = sourceWrapperHandler.create(wrapperElement, context);
+ if (sourceWrapper != null) {
+ if (!childElements.isEmpty()) {
+ // Set the return value
+ ElementInfo returnElement = wrapper.getOutputChildElements().get(0);
+ sourceWrapperHandler.setChild(sourceWrapper, 0, returnElement, response);
+ }
+ Object targetWrapper =
+ mediator.mediate(sourceWrapper, sourceWrapperType, targetType.getLogical(), context
+ .getMetadata());
+ return targetWrapper;
+ }
+ }
+ }
+ Object targetWrapper = targetWrapperHandler.create(wrapper.getOutputWrapperElement(), context);
+
+ if (childElements.isEmpty()) {
+ // void output
+ return targetWrapper;
+ }
+ ElementInfo argElement = childElements.get(0);
+ DataType<XMLType> argType = wrapper.getUnwrappedOutputType();
+ Object child = response;
+ child = mediator.mediate(response, sourceType.getLogical(), argType, context.getMetadata());
+ targetWrapperHandler.setChild(targetWrapper, 0, argElement, child);
+ return targetWrapper;
+ } else if (sourceWrapped && (!targetWrapped)) {
+ // Wrapped to Unwrapped
+ Object sourceWrapper = response;
+ List<ElementInfo> childElements = sourceOp.getWrapper().getOutputChildElements();
+ if (childElements.isEmpty()) {
+ // The void output
+ return null;
+ }
+ if (targetWrapperHandler != null) {
+ ElementInfo wrapperElement = sourceOp.getWrapper().getOutputWrapperElement();
+
+ // FIXME: This is a workaround for the wsdless support as it passes in child elements
+ // under the wrapper that only matches by position
+ if (sourceWrapperHandler.isInstance(sourceWrapper, wrapperElement, childElements, context)) {
+ DataType targetWrapperType =
+ targetWrapperHandler.getWrapperType(wrapperElement, childElements, context);
+ if (targetWrapperType != null) {
+ Object targetWrapper =
+ mediator.mediate(sourceWrapper, sourceType.getLogical(), targetWrapperType, context
+ .getMetadata());
+ return targetWrapperHandler.getChildren(targetWrapper, childElements, context).get(0);
+ }
+ }
+ }
+ Object child = sourceWrapperHandler.getChildren(sourceWrapper, childElements, context).get(0);
+ DataType<?> childType = sourceOp.getWrapper().getUnwrappedOutputType();
+ return mediator.mediate(child, childType, targetType.getLogical(), context.getMetadata());
+ } else {
+ // FIXME: Do we want to handle wrapped to wrapped?
+ return mediator.mediate(response, sourceType.getLogical(), targetType.getLogical(), context
+ .getMetadata());
+ }
+ } catch (Exception e) {
+ throw new TransformationException(e);
+ }
+ }
+
+}
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