User: dsundstrom
Date: 01/08/30 16:32:54
Modified: src/main/org/jboss/ejb/plugins/cmp/jdbc/metadata
JDBCTypeMappingMetaData.java
Log:
Rewrote most of the sql generation code. It's much cleaner now.
Added table alias generation code. Table aliases are prepened with a header.
The default header is t1_, where 1 is incremented as each header is generated.
Revision Changes Path
1.5 +52 -1
jboss/src/main/org/jboss/ejb/plugins/cmp/jdbc/metadata/JDBCTypeMappingMetaData.java
Index: JDBCTypeMappingMetaData.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/cmp/jdbc/metadata/JDBCTypeMappingMetaData.java,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- JDBCTypeMappingMetaData.java 2001/08/19 22:50:33 1.4
+++ JDBCTypeMappingMetaData.java 2001/08/30 23:32:54 1.5
@@ -18,7 +18,7 @@
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Dain Sundstrom</a>
* @author <a href="[EMAIL PROTECTED]">Sebastien Alborini</a>
- * @version $Revision: 1.4 $
+ * @version $Revision: 1.5 $
*/
public final class JDBCTypeMappingMetaData {
@@ -32,6 +32,10 @@
private final HashMap functionMappings = new HashMap();
+ private final String aliasHeaderPrefix;
+ private final String aliasHeaderSuffix;
+ private final int aliasMaxLength;
+
/**
* Constructs a mapping with the data contained in the type-mapping xml element
* from a jbosscmp-jdbc xml file.
@@ -63,6 +67,24 @@
JDBCFunctionMappingMetaData functionMapping = new
JDBCFunctionMappingMetaData(mappingElement);
functionMappings.put(functionMapping.getFunctionName().toLowerCase(), functionMapping);
}
+
+ String prefix = MetaData.getOptionalChildContent(element,
"alias-header-prefix");
+ if(prefix == null) {
+ prefix = "t";
+ }
+ aliasHeaderPrefix = prefix;
+
+ String suffix = MetaData.getOptionalChildContent(element,
"alias-header-suffix");
+ if(suffix == null) {
+ suffix = "_";
+ }
+ aliasHeaderSuffix = suffix;
+
+ String max = MetaData.getOptionalChildContent(element,
"alias-max-length");
+ if(max == null) {
+ max = "32";
+ }
+ aliasMaxLength = Integer.parseInt(max);
}
/**
@@ -74,7 +96,36 @@
public String getName() {
return name;
}
+
+ /**
+ * Gets the prefix for that is used when generating an alias header. An alias
header
+ * is prepended to a generated table alias to prevent name collisions. An
alias header
+ * is constructed as folows: aliasHeaderPrefix + int_counter +
aliasHeaderSuffix
+ * @return the prefix for alias headers
+ */
+ public String getAliasHeaderPrefix() {
+ return aliasHeaderPrefix;
+ }
+ /**
+ * Gets the suffix for that is used when generating an alias header. An alias
header
+ * is prepended to a generated table alias to prevent name collisions. An
alias header
+ * is constructed as folows: aliasHeaderPrefix + int_counter +
aliasHeaderSuffix
+ * @return the suffix for alias headers
+ */
+ public String getAliasHeaderSuffix() {
+ return aliasHeaderSuffix;
+ }
+
+ /**
+ * Gets maximum length of a table alias.
+ * An alias is constructed as folows: aliasHeader + ejb_ql_identifier_path
+ * @return the maximum length that a table alias can be
+ */
+ public int getAliasMaxLength() {
+ return aliasMaxLength;
+ }
+
/**
* Gets the jdbc type which this class has mapped to the specified java class.
* The jdbc type is used to retrieve data from a result set and to set
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