package com.ibatis.sqlmap.engine.mapping.parameter;
import com.ibatis.common.beans.Probe;
import com.ibatis.common.beans.ProbeFactory;
import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapException;
import com.ibatis.sqlmap.client.extensions.TypeHandlerCallback;
import com.ibatis.sqlmap.engine.mapping.sql.SqlText;
import com.ibatis.sqlmap.engine.type.CustomTypeHandler;
import com.ibatis.sqlmap.engine.type.DomTypeMarker;
import com.ibatis.sqlmap.engine.type.TypeHandler;
import com.ibatis.sqlmap.engine.type.TypeHandlerFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
public class InlineParameterMapParser {
private static my.Debug DEBUG=new my.Debug(my.Debug.SqlMapConfigParser);//我加上的
private static final Probe PROBE = ProbeFactory.getProbe();
private static final String PARAMETER_TOKEN = "#";
private static final String PARAM_DELIM = ":";
public SqlText parseInlineParameterMap(TypeHandlerFactory typeHandlerFactory, String sqlStatement) {
try {//我加上的
DEBUG.P(this,"parseInlineParameterMap(2)");
return parseInlineParameterMap(typeHandlerFactory, sqlStatement, null);
}finally{//我加上的
DEBUG.P(0,this,"parseInlineParameterMap(2)");
}
}
public SqlText parseInlineParameterMap(TypeHandlerFactory typeHandlerFactory, String sqlStatement, Class parameterClass) {
try {//我加上的
DEBUG.P(this,"parseInlineParameterMap(3)");
DEBUG.P("sqlStatement="+sqlStatement);
DEBUG.P("parameterClass="+parameterClass);
String newSql = sqlStatement;
List mappingList = new ArrayList();
//第三个参数为true，表示把分隔符PARAMETER_TOKEN("#")也返回
StringTokenizer parser = new StringTokenizer(sqlStatement, PARAMETER_TOKEN, true);
StringBuffer newSqlBuffer = new StringBuffer();
String token = null;
String lastToken = null;
while (parser.hasMoreTokens()) {
token = parser.nextToken();
DEBUG.P("lastToken="+lastToken);
DEBUG.P("token="+token);
if (PARAMETER_TOKEN.equals(lastToken)) {
if (PARAMETER_TOKEN.equals(token)) {
//连续的两个#代表一个"#"字符
//如:select * from ACCOUNT where ACC_FIRST_NAME = "##"
//实际是: select * from ACCOUNT where ACC_FIRST_NAME = "#"
newSqlBuffer.append(PARAMETER_TOKEN);
token = null;
} else {
ParameterMapping mapping = null;
if (token.indexOf(PARAM_DELIM) > -1) {
mapping = oldParseMapping(token, parameterClass, typeHandlerFactory);
} else {
mapping = newParseMapping(token, parameterClass, typeHandlerFactory);
}
mappingList.add(mapping);
newSqlBuffer.append("?");
token = parser.nextToken();
DEBUG.P("token2="+token);
if (!PARAMETER_TOKEN.equals(token)) {
throw new SqlMapException("Unterminated inline parameter in mapped statement (" + "statement.getId()" + ").");
}
token = null;
}
} else {
if (!PARAMETER_TOKEN.equals(token)) {
newSqlBuffer.append(token);
}
}
lastToken = token;
}
newSql = newSqlBuffer.toString();
DEBUG.P(1);
DEBUG.P("newSql="+newSql);
ParameterMapping[] mappingArray = (ParameterMapping[]) mappingList.toArray(new ParameterMapping[mappingList.size()]);
DEBUG.PA("mappingArray",mappingArray);
SqlText sqlText = new SqlText();
sqlText.setText(newSql);
sqlText.setParameterMappings(mappingArray);
return sqlText;
}finally{//我加上的
DEBUG.P(0,this,"parseInlineParameterMap(3)");
}
}
private ParameterMapping newParseMapping(String token, Class parameterClass, TypeHandlerFactory typeHandlerFactory) {
try {//我加上的
DEBUG.P(this,"newParseMapping(3)");
DEBUG.P("token="+token);
DEBUG.P("parameterClass="+parameterClass);
ParameterMapping mapping = new ParameterMapping();
// #propertyName,javaType=string,jdbcType=VARCHAR,mode=IN,nullValue=N/A,handler=string,numericScale=2#
StringTokenizer paramParser = new StringTokenizer(token, "=,", false);
mapping.setPropertyName(paramParser.nextToken());
while (paramParser.hasMoreTokens()) {
String field = paramParser.nextToken();
if (paramParser.hasMoreTokens()) {
String value = paramParser.nextToken();
if ("javaType".equals(field)) {
value = typeHandlerFactory.resolveAlias(value);
mapping.setJavaTypeName(value);
} else if ("jdbcType".equals(field)) {
mapping.setJdbcTypeName(value);
} else if ("mode".equals(field)) {
mapping.setMode(value);
} else if ("nullValue".equals(field)) {
mapping.setNullValue(value);
} else if ("handler".equals(field)) {
try {
value = typeHandlerFactory.resolveAlias(value);
Object impl = Resources.instantiate(value);
if (impl instanceof TypeHandlerCallback) {
mapping.setTypeHandler(new CustomTypeHandler((TypeHandlerCallback) impl));
} else if (impl instanceof TypeHandler) {
mapping.setTypeHandler((TypeHandler) impl);
} else {
throw new SqlMapException ("The class " + value + " is not a valid implementation of TypeHandler or TypeHandlerCallback");
}
} catch (Exception e) {
throw new SqlMapException("Error loading class specified by handler field in " + token + ". Cause: " + e, e);
}
} else if ("numericScale".equals(field)) {
try {
Integer numericScale = Integer.valueOf(value);
if (numericScale.intValue() < 0) {
throw new SqlMapException("Value specified for numericScale must be greater than or equal to zero");
}
mapping.setNumericScale(numericScale);
} catch (NumberFormatException e) {
throw new SqlMapException("Value specified for numericScale is not a valid Integer");
}
} else {
throw new SqlMapException("Unrecognized parameter mapping field: '" + field + "' in " + token);
}
} else {
throw new SqlMapException("Incorrect inline parameter map format (missmatched name=value pairs): " + token);
}
}
if (mapping.getTypeHandler() == null) {
TypeHandler handler;
if (parameterClass == null) {
handler = typeHandlerFactory.getUnkownTypeHandler();
} else {
handler = resolveTypeHandler(typeHandlerFactory, parameterClass, mapping.getPropertyName(), mapping.getJavaTypeName(), mapping.getJdbcTypeName());
}
mapping.setTypeHandler(handler);
}
return mapping;
}finally{//我加上的
DEBUG.P(0,this,"newParseMapping(3)");
}
}
private ParameterMapping oldParseMapping(String token, Class parameterClass, TypeHandlerFactory typeHandlerFactory) {
try {//我加上的
DEBUG.P(this,"oldParseMapping(3)");
ParameterMapping mapping = new ParameterMapping();
if (token.indexOf(PARAM_DELIM) > -1) {
StringTokenizer paramParser = new StringTokenizer(token, PARAM_DELIM, true);
int n1 = paramParser.countTokens();
if (n1 == 3) {
String name = paramParser.nextToken();
paramParser.nextToken(); //ignore ":"
String type = paramParser.nextToken();
mapping.setPropertyName(name);
mapping.setJdbcTypeName(type);
TypeHandler handler;
if (parameterClass == null) {
handler = typeHandlerFactory.getUnkownTypeHandler();
} else {
handler = resolveTypeHandler(typeHandlerFactory, parameterClass, name, null, type);
}
mapping.setTypeHandler(handler);
return mapping;
} else if (n1 >= 5) {
String name = paramParser.nextToken();
paramParser.nextToken(); //ignore ":"
String type = paramParser.nextToken();
paramParser.nextToken(); //ignore ":"
String nullValue = paramParser.nextToken();
while (paramParser.hasMoreTokens()) {
nullValue = nullValue + paramParser.nextToken();
}
mapping.setPropertyName(name);
mapping.setJdbcTypeName(type);
mapping.setNullValue(nullValue);
TypeHandler handler;
if (parameterClass == null) {
handler = typeHandlerFactory.getUnkownTypeHandler();
} else {
handler = resolveTypeHandler(typeHandlerFactory, parameterClass, name, null, type);
}
mapping.setTypeHandler(handler);
return mapping;
} else {
throw new SqlMapException("Incorrect inline parameter map format: " + token);
}
} else {
mapping.setPropertyName(token);
TypeHandler handler;
if (parameterClass == null) {
handler = typeHandlerFactory.getUnkownTypeHandler();
} else {
handler = resolveTypeHandler(typeHandlerFactory, parameterClass, token, null, null);
}
mapping.setTypeHandler(handler);
return mapping;
}
}finally{//我加上的
DEBUG.P(0,this,"oldParseMapping(3)");
}
}
private TypeHandler resolveTypeHandler(TypeHandlerFactory typeHandlerFactory, Class clazz, String propertyName, String javaType, String jdbcType) {
try {//我加上的
DEBUG.P(this,"resolveTypeHandler(5)");
TypeHandler handler = null;
if (clazz == null) {
// Unknown
handler = typeHandlerFactory.getUnkownTypeHandler();
} else if (DomTypeMarker.class.isAssignableFrom(clazz)) {
// DOM
handler = typeHandlerFactory.getTypeHandler(String.class, jdbcType);
} else if (java.util.Map.class.isAssignableFrom(clazz)) {
// Map
if (javaType == null) {
handler = typeHandlerFactory.getUnkownTypeHandler(); //BUG 1012591 - typeHandlerFactory.getTypeHandler(java.lang.Object.class, jdbcType);
} else {
try {
javaType = typeHandlerFactory.resolveAlias(javaType);
Class javaClass = Resources.classForName(javaType);
handler = typeHandlerFactory.getTypeHandler(javaClass, jdbcType);
} catch (Exception e) {
throw new SqlMapException("Error. Could not set TypeHandler. Cause: " + e, e);
}
}
} else if (typeHandlerFactory.getTypeHandler(clazz, jdbcType) != null) {
// Primitive
handler = typeHandlerFactory.getTypeHandler(clazz, jdbcType);
} else {
// JavaBean
if (javaType == null) {
Class type = PROBE.getPropertyTypeForGetter(clazz, propertyName);
handler = typeHandlerFactory.getTypeHandler(type, jdbcType);
} else {
try {
javaType = typeHandlerFactory.resolveAlias(javaType);
Class javaClass = Resources.classForName(javaType);
handler = typeHandlerFactory.getTypeHandler(javaClass, jdbcType);
} catch (Exception e) {
throw new SqlMapException("Error. Could not set TypeHandler. Cause: " + e, e);
}
}
}
return handler;
}finally{//我加上的
DEBUG.P(0,this,"resolveTypeHandler(5)");
}
}
}