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Diffstat (limited to 'sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/transformers/Output2OutputTransformer.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/transformers/Output2OutputTransformer.java | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/transformers/Output2OutputTransformer.java b/sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/transformers/Output2OutputTransformer.java new file mode 100644 index 0000000000..b1bc8dfe1b --- /dev/null +++ b/sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/transformers/Output2OutputTransformer.java @@ -0,0 +1,185 @@ +/* + * 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.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.Transformer; +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.impl.DataTypeImpl; +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; +import org.osoa.sca.annotations.Service; + +/** + * This is a special transformer to transform the output from one IDL to the + * other one + */ +@Service(Transformer.class) +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() + */ + 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; + if (sourceWrapped) { + sourceWrapperHandler = getWrapperHandler(getDataBinding(sourceOp), true); + } + + DataType<DataType> targetType = context.getTargetDataType(); + Operation targetOp = context.getTargetOperation(); + boolean targetWrapped = targetOp != null && targetOp.isWrapperStyle(); + WrapperHandler targetWrapperHandler = null; + if (targetWrapped) { + targetWrapperHandler = getWrapperHandler(getDataBinding(targetOp), true); + } + + if ((!sourceWrapped) && targetWrapped) { + // Unwrapped --> Wrapped + WrapperInfo wrapper = targetOp.getWrapper(); + Object targetWrapper = targetWrapperHandler.create(wrapper.getOutputWrapperElement(), context); + + List<ElementInfo> childElements = wrapper.getOutputChildElements(); + 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; + } + targetWrapperHandler = getWrapperHandler(getDataBinding(targetOp), false); + if (targetWrapperHandler != null) { + ElementInfo wrapperElement = sourceOp.getWrapper().getOutputWrapperElement(); + // Object targetWrapper = + // targetWrapperHandler.create(wrapperElement, context); + DataType<XMLType> targetWrapperType = new DataTypeImpl<XMLType>(targetType.getLogical() + .getDataBinding(), Object.class, new XMLType(wrapperElement)); + Object targetWrapper = mediator.mediate(sourceWrapper, + sourceType.getLogical(), + targetWrapperType, + context.getMetadata()); + return targetWrapperHandler.getChildren(targetWrapper).get(0); + } else { + Object child = sourceWrapperHandler.getChildren(sourceWrapper).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); + } + } + +} |