1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
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);
}
}
}
|
