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16 package org.apache.ibatis.builder;
17
18 import java.util.ArrayList;
19 import java.util.List;
20 import java.util.Map;
21 import java.util.StringTokenizer;
22
23 import org.apache.ibatis.mapping.ParameterMapping;
24 import org.apache.ibatis.mapping.SqlSource;
25 import org.apache.ibatis.parsing.GenericTokenParser;
26 import org.apache.ibatis.parsing.TokenHandler;
27 import org.apache.ibatis.reflection.MetaClass;
28 import org.apache.ibatis.reflection.MetaObject;
29 import org.apache.ibatis.session.Configuration;
30 import org.apache.ibatis.type.JdbcType;
31
32
33
34
35 public class SqlSourceBuilder extends BaseBuilder {
36
37 private static final String PARAMETER_PROPERTIES = "javaType,jdbcType,mode,numericScale,resultMap,typeHandler,jdbcTypeName";
38
39 public SqlSourceBuilder(Configuration configuration) {
40 super(configuration);
41 }
42
43 public SqlSource parse(String originalSql, Class<?> parameterType, Map<String, Object> additionalParameters) {
44 ParameterMappingTokenHandler handler = new ParameterMappingTokenHandler(configuration, parameterType, additionalParameters);
45 GenericTokenParser parser = new GenericTokenParser("#{", "}", handler);
46 String sql;
47 if (configuration.isShrinkWhitespacesInSql()) {
48 sql = parser.parse(removeExtraWhitespaces(originalSql));
49 } else {
50 sql = parser.parse(originalSql);
51 }
52 return new StaticSqlSource(configuration, sql, handler.getParameterMappings());
53 }
54
55 public static String removeExtraWhitespaces(String original) {
56 StringTokenizer tokenizer = new StringTokenizer(original);
57 StringBuilder builder = new StringBuilder();
58 boolean hasMoreTokens = tokenizer.hasMoreTokens();
59 while (hasMoreTokens) {
60 builder.append(tokenizer.nextToken());
61 hasMoreTokens = tokenizer.hasMoreTokens();
62 if (hasMoreTokens) {
63 builder.append(' ');
64 }
65 }
66 return builder.toString();
67 }
68
69 private static class ParameterMappingTokenHandler extends BaseBuilder implements TokenHandler {
70
71 private final List<ParameterMapping> parameterMappings = new ArrayList<>();
72 private final Class<?> parameterType;
73 private final MetaObject metaParameters;
74
75 public ParameterMappingTokenHandler(Configuration configuration, Class<?> parameterType, Map<String, Object> additionalParameters) {
76 super(configuration);
77 this.parameterType = parameterType;
78 this.metaParameters = configuration.newMetaObject(additionalParameters);
79 }
80
81 public List<ParameterMapping> getParameterMappings() {
82 return parameterMappings;
83 }
84
85 @Override
86 public String handleToken(String content) {
87 parameterMappings.add(buildParameterMapping(content));
88 return "?";
89 }
90
91 private ParameterMapping buildParameterMapping(String content) {
92 Map<String, String> propertiesMap = parseParameterMapping(content);
93 String property = propertiesMap.get("property");
94 Class<?> propertyType;
95 if (metaParameters.hasGetter(property)) {
96 propertyType = metaParameters.getGetterType(property);
97 } else if (typeHandlerRegistry.hasTypeHandler(parameterType)) {
98 propertyType = parameterType;
99 } else if (JdbcType.CURSOR.name().equals(propertiesMap.get("jdbcType"))) {
100 propertyType = java.sql.ResultSet.class;
101 } else if (property == null || Map.class.isAssignableFrom(parameterType)) {
102 propertyType = Object.class;
103 } else {
104 MetaClass metaClass = MetaClass.forClass(parameterType, configuration.getReflectorFactory());
105 if (metaClass.hasGetter(property)) {
106 propertyType = metaClass.getGetterType(property);
107 } else {
108 propertyType = Object.class;
109 }
110 }
111 ParameterMapping.Builder builder = new ParameterMapping.Builder(configuration, property, propertyType);
112 Class<?> javaType = propertyType;
113 String typeHandlerAlias = null;
114 for (Map.Entry<String, String> entry : propertiesMap.entrySet()) {
115 String name = entry.getKey();
116 String value = entry.getValue();
117 if ("javaType".equals(name)) {
118 javaType = resolveClass(value);
119 builder.javaType(javaType);
120 } else if ("jdbcType".equals(name)) {
121 builder.jdbcType(resolveJdbcType(value));
122 } else if ("mode".equals(name)) {
123 builder.mode(resolveParameterMode(value));
124 } else if ("numericScale".equals(name)) {
125 builder.numericScale(Integer.valueOf(value));
126 } else if ("resultMap".equals(name)) {
127 builder.resultMapId(value);
128 } else if ("typeHandler".equals(name)) {
129 typeHandlerAlias = value;
130 } else if ("jdbcTypeName".equals(name)) {
131 builder.jdbcTypeName(value);
132 } else if ("property".equals(name)) {
133
134 } else if ("expression".equals(name)) {
135 throw new BuilderException("Expression based parameters are not supported yet");
136 } else {
137 throw new BuilderException("An invalid property '" + name + "' was found in mapping #{" + content + "}. Valid properties are " + PARAMETER_PROPERTIES);
138 }
139 }
140 if (typeHandlerAlias != null) {
141 builder.typeHandler(resolveTypeHandler(javaType, typeHandlerAlias));
142 }
143 return builder.build();
144 }
145
146 private Map<String, String> parseParameterMapping(String content) {
147 try {
148 return new ParameterExpression(content);
149 } catch (BuilderException ex) {
150 throw ex;
151 } catch (Exception ex) {
152 throw new BuilderException("Parsing error was found in mapping #{" + content + "}. Check syntax #{property|(expression), var1=value1, var2=value2, ...} ", ex);
153 }
154 }
155 }
156
157 }