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16 package org.springframework.batch.admin.web;
17
18 import java.beans.PropertyEditor;
19 import java.io.IOException;
20 import java.util.Arrays;
21 import java.util.HashMap;
22 import java.util.List;
23 import java.util.Map;
24
25 import org.springframework.beans.BeanWrapperImpl;
26 import org.springframework.beans.BeansException;
27 import org.springframework.beans.PropertyEditorRegistry;
28 import org.springframework.beans.factory.BeanFactory;
29 import org.springframework.beans.factory.BeanFactoryAware;
30 import org.springframework.beans.factory.support.AbstractBeanFactory;
31 import org.springframework.core.convert.converter.Converter;
32 import org.springframework.core.convert.support.GenericConversionService;
33 import org.springframework.http.HttpInputMessage;
34 import org.springframework.http.HttpOutputMessage;
35 import org.springframework.http.MediaType;
36 import org.springframework.http.converter.HttpMessageConverter;
37 import org.springframework.http.converter.HttpMessageNotReadableException;
38 import org.springframework.http.converter.HttpMessageNotWritableException;
39 import org.springframework.integration.http.converter.MultipartAwareFormHttpMessageConverter;
40 import org.springframework.util.MultiValueMap;
41 import org.springframework.web.multipart.MultipartFile;
42
43 public class BindingHttpMessageConverter<T> implements HttpMessageConverter<T>, BeanFactoryAware {
44
45 private AbstractBeanFactory beanFactory;
46
47 private MultipartAwareFormHttpMessageConverter delegate = new MultipartAwareFormHttpMessageConverter();
48
49 private Class<T> targetType;
50
51 public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
52 this.beanFactory = (AbstractBeanFactory) beanFactory;
53 }
54
55
56
57
58 public void setTargetType(Class<T> targetType) {
59 this.targetType = targetType;
60 }
61
62 public List<MediaType> getSupportedMediaTypes() {
63 return Arrays.asList(MediaType.TEXT_PLAIN);
64 }
65
66 public boolean canRead(Class<?> clazz, MediaType mediaType) {
67 return clazz.isAssignableFrom(targetType);
68 }
69
70 public boolean canWrite(Class<?> clazz, MediaType mediaType) {
71 return false;
72 }
73
74 public T read(Class<? extends T> clazz, HttpInputMessage inputMessage) throws IOException,
75 HttpMessageNotReadableException {
76 MultiValueMap<String, ?> map = delegate.read(null, inputMessage);
77 BeanWrapperImpl beanWrapper = new BeanWrapperImpl(targetType);
78 initBeanWrapper(beanWrapper);
79 Map<String, Object> props = new HashMap<String, Object>();
80 for (String key : map.keySet()) {
81 if (beanWrapper.isWritableProperty(key)) {
82 List<?> list = map.get(key);
83 props.put(key, map.get(key).size()>1 ? list : map.getFirst(key));
84 }
85 }
86 beanWrapper.setPropertyValues(props);
87 @SuppressWarnings("unchecked")
88 T result = (T) beanWrapper.getWrappedInstance();
89 return result;
90 }
91
92 public void write(T input, MediaType contentType, HttpOutputMessage outputMessage) throws IOException,
93 HttpMessageNotWritableException {
94 throw new UnsupportedOperationException();
95 }
96
97 private void initBeanWrapper(BeanWrapperImpl beanWrapper) {
98
99 GenericConversionService conversionService = new GenericConversionService();
100 conversionService.addConverter(new MultipartFileConverter(beanWrapper));
101
102 beanWrapper.setConversionService(conversionService);
103 if (beanFactory != null) {
104 beanFactory.copyRegisteredEditorsTo(beanWrapper);
105 }
106
107 }
108
109 private static class MultipartFileConverter implements Converter<MultipartFile, String> {
110
111 private final PropertyEditorRegistry accessor;
112
113 public MultipartFileConverter(PropertyEditorRegistry accessor) {
114 this.accessor = accessor;
115 }
116
117 public String convert(MultipartFile source) {
118
119 PropertyEditor editor = accessor.findCustomEditor(MultipartFile.class, null);
120 if (editor == null) {
121 throw new IllegalStateException("Cannot convert source of type " + source.getClass()
122 + " to type: String");
123 }
124 editor.setValue(source);
125 return editor.getAsText();
126 }
127
128 }
129
130 }