1 | |
|
2 | |
|
3 | |
|
4 | |
|
5 | |
|
6 | |
|
7 | |
package org.mule.transformer; |
8 | |
|
9 | |
import org.mule.api.DefaultMuleException; |
10 | |
import org.mule.api.MuleContext; |
11 | |
import org.mule.api.MuleException; |
12 | |
import org.mule.api.endpoint.ImmutableEndpoint; |
13 | |
import org.mule.api.lifecycle.InitialisationException; |
14 | |
import org.mule.api.transformer.Transformer; |
15 | |
import org.mule.config.i18n.CoreMessages; |
16 | |
import org.mule.transformer.types.DataTypeFactory; |
17 | |
import org.mule.transport.service.TransportFactoryException; |
18 | |
import org.mule.transport.service.TransportServiceDescriptor; |
19 | |
|
20 | |
import java.util.Iterator; |
21 | |
import java.util.LinkedList; |
22 | |
import java.util.List; |
23 | |
import java.util.StringTokenizer; |
24 | |
|
25 | |
import org.apache.commons.logging.Log; |
26 | |
import org.apache.commons.logging.LogFactory; |
27 | |
|
28 | 0 | public class TransformerUtils |
29 | |
{ |
30 | |
|
31 | |
public static final String COMMA = ","; |
32 | |
|
33 | 0 | private static Log logger = LogFactory.getLog(AbstractTransformer.class); |
34 | |
|
35 | |
public static void initialiseAllTransformers(List<Transformer> transformers) throws InitialisationException |
36 | |
{ |
37 | 0 | if (transformers != null) |
38 | |
{ |
39 | 0 | Iterator<Transformer> transformer = transformers.iterator(); |
40 | 0 | while (transformer.hasNext()) |
41 | |
{ |
42 | 0 | (transformer.next()).initialise(); |
43 | |
} |
44 | |
} |
45 | 0 | } |
46 | |
|
47 | |
public static String toString(List<Transformer> transformers) |
48 | |
{ |
49 | 0 | StringBuffer buffer = new StringBuffer(); |
50 | 0 | Iterator<Transformer> transformer = transformers.iterator(); |
51 | 0 | while (transformer.hasNext()) |
52 | |
{ |
53 | 0 | buffer.append(transformer.next().toString()); |
54 | 0 | if (transformer.hasNext()) |
55 | |
{ |
56 | 0 | buffer.append(" -> "); |
57 | |
} |
58 | |
} |
59 | 0 | return buffer.toString(); |
60 | |
} |
61 | |
|
62 | |
public static Transformer firstOrNull(List<Transformer> transformers) |
63 | |
{ |
64 | 0 | if (transformers != null && 0 != transformers.size()) |
65 | |
{ |
66 | 0 | return transformers.get(0); |
67 | |
} |
68 | |
else |
69 | |
{ |
70 | 0 | return null; |
71 | |
} |
72 | |
} |
73 | |
|
74 | |
public static boolean isSourceTypeSupportedByFirst(List<Transformer> transformers, Class clazz) |
75 | |
{ |
76 | 0 | Transformer transformer = firstOrNull(transformers); |
77 | 0 | return null != transformer && transformer.isSourceDataTypeSupported(new DataTypeFactory().create(clazz)); |
78 | |
} |
79 | |
|
80 | 0 | protected static interface TransformerSource |
81 | |
{ |
82 | |
public List<Transformer> getTransformers() throws TransportFactoryException; |
83 | |
} |
84 | |
|
85 | |
protected static List<Transformer> getTransformersFromSource(TransformerSource source) |
86 | |
{ |
87 | |
try |
88 | |
{ |
89 | 0 | List<Transformer> transformers = source.getTransformers(); |
90 | 0 | TransformerUtils.initialiseAllTransformers(transformers); |
91 | 0 | return transformers; |
92 | |
} |
93 | 0 | catch (MuleException e) |
94 | |
{ |
95 | 0 | logger.debug(e.getMessage(), e); |
96 | 0 | return null; |
97 | |
} |
98 | |
} |
99 | |
|
100 | |
public static List<Transformer> getDefaultInboundTransformers(final TransportServiceDescriptor serviceDescriptor, final ImmutableEndpoint endpoint) |
101 | |
{ |
102 | 0 | return getTransformersFromSource(new TransformerSource() |
103 | 0 | { |
104 | |
public List<Transformer> getTransformers() throws TransportFactoryException |
105 | |
{ |
106 | 0 | return serviceDescriptor.createInboundTransformers(endpoint); |
107 | |
} |
108 | |
}); |
109 | |
} |
110 | |
|
111 | |
public static List<Transformer> getDefaultResponseTransformers(final TransportServiceDescriptor serviceDescriptor, final ImmutableEndpoint endpoint) |
112 | |
{ |
113 | 0 | return getTransformersFromSource(new TransformerSource() |
114 | 0 | { |
115 | |
public List<Transformer> getTransformers() throws TransportFactoryException |
116 | |
{ |
117 | 0 | return serviceDescriptor.createResponseTransformers(endpoint); |
118 | |
} |
119 | |
}); |
120 | |
} |
121 | |
|
122 | |
public static List<Transformer> getDefaultOutboundTransformers(final TransportServiceDescriptor serviceDescriptor, final ImmutableEndpoint endpoint) |
123 | |
{ |
124 | 0 | return getTransformersFromSource(new TransformerSource() |
125 | 0 | { |
126 | |
public List<Transformer> getTransformers() throws TransportFactoryException |
127 | |
{ |
128 | 0 | return serviceDescriptor.createOutboundTransformers(endpoint); |
129 | |
} |
130 | |
}); |
131 | |
} |
132 | |
|
133 | |
|
134 | |
|
135 | |
|
136 | |
|
137 | |
|
138 | |
|
139 | |
|
140 | |
|
141 | |
public static List<Transformer> getTransformers(String names, MuleContext muleContext) throws DefaultMuleException |
142 | |
{ |
143 | 0 | if (null != names) |
144 | |
{ |
145 | 0 | List<Transformer> transformers = new LinkedList<Transformer>(); |
146 | 0 | StringTokenizer st = new StringTokenizer(names, COMMA); |
147 | 0 | while (st.hasMoreTokens()) |
148 | |
{ |
149 | 0 | String key = st.nextToken().trim(); |
150 | 0 | Transformer transformer = muleContext.getRegistry().lookupTransformer(key); |
151 | |
|
152 | 0 | if (transformer == null) |
153 | |
{ |
154 | 0 | throw new DefaultMuleException(CoreMessages.objectNotRegistered("Transformer", key)); |
155 | |
} |
156 | 0 | transformers.add(transformer); |
157 | 0 | } |
158 | 0 | return transformers; |
159 | |
} |
160 | |
else |
161 | |
{ |
162 | 0 | return null; |
163 | |
} |
164 | |
} |
165 | |
|
166 | |
} |