আমার ক্ষেত্রে আমি হাইবারনেট-কোর উত্স কোডটি সংশোধন করেছি, একটি নতুন টিকা প্রবর্তনের জন্য @DefaultValue:
commit 34199cba96b6b1dc42d0d19c066bd4d119b553d5
Author: Lenik <xjl at 99jsj.com>
Date: Wed Dec 21 13:28:33 2011 +0800
Add default-value ddl support with annotation @DefaultValue.
diff --git a/hibernate-core/src/main/java/org/hibernate/annotations/DefaultValue.java b/hibernate-core/src/main/java/org/hibernate/annotations/DefaultValue.java
new file mode 100644
index 0000000..b3e605e
--- /dev/null
+++ b/hibernate-core/src/main/java/org/hibernate/annotations/DefaultValue.java
@@ -0,0 +1,35 @@
+package org.hibernate.annotations;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+import java.lang.annotation.Retention;
+
+/**
+ * Specify a default value for the column.
+ *
+ * This is used to generate the auto DDL.
+ *
+ * WARNING: This is not part of JPA 2.0 specification.
+ *
+ * @author 谢继雷
+ */
+@java.lang.annotation.Target({ FIELD, METHOD })
+@Retention(RUNTIME)
+public @interface DefaultValue {
+
+ /**
+ * The default value sql fragment.
+ *
+ * For string values, you need to quote the value like 'foo'.
+ *
+ * Because different database implementation may use different
+ * quoting format, so this is not portable. But for simple values
+ * like number and strings, this is generally enough for use.
+ */
+ String value();
+
+}
diff --git a/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3Column.java b/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3Column.java
index b289b1e..ac57f1a 100644
--- a/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3Column.java
+++ b/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3Column.java
@@ -29,6 +29,7 @@ import org.hibernate.AnnotationException;
import org.hibernate.AssertionFailure;
import org.hibernate.annotations.ColumnTransformer;
import org.hibernate.annotations.ColumnTransformers;
+import org.hibernate.annotations.DefaultValue;
import org.hibernate.annotations.common.reflection.XProperty;
import org.hibernate.cfg.annotations.Nullability;
import org.hibernate.mapping.Column;
@@ -65,6 +66,7 @@ public class Ejb3Column {
private String propertyName;
private boolean unique;
private boolean nullable = true;
+ private String defaultValue;
private String formulaString;
private Formula formula;
private Table table;
@@ -175,7 +177,15 @@ public class Ejb3Column {
return mappingColumn.isNullable();
}
- public Ejb3Column() {
+ public String getDefaultValue() {
+ return defaultValue;
+ }
+
+ public void setDefaultValue(String defaultValue) {
+ this.defaultValue = defaultValue;
+ }
+
+ public Ejb3Column() {
}
public void bind() {
@@ -186,7 +196,7 @@ public class Ejb3Column {
}
else {
initMappingColumn(
- logicalColumnName, propertyName, length, precision, scale, nullable, sqlType, unique, true
+ logicalColumnName, propertyName, length, precision, scale, nullable, sqlType, unique, defaultValue, true
);
log.debug( "Binding column: " + toString());
}
@@ -201,6 +211,7 @@ public class Ejb3Column {
boolean nullable,
String sqlType,
boolean unique,
+ String defaultValue,
boolean applyNamingStrategy) {
if ( StringHelper.isNotEmpty( formulaString ) ) {
this.formula = new Formula();
@@ -217,6 +228,7 @@ public class Ejb3Column {
this.mappingColumn.setNullable( nullable );
this.mappingColumn.setSqlType( sqlType );
this.mappingColumn.setUnique( unique );
+ this.mappingColumn.setDefaultValue(defaultValue);
if(writeExpression != null && !writeExpression.matches("[^?]*\\?[^?]*")) {
throw new AnnotationException(
@@ -454,6 +466,11 @@ public class Ejb3Column {
else {
column.setLogicalColumnName( columnName );
}
+ DefaultValue _defaultValue = inferredData.getProperty().getAnnotation(DefaultValue.class);
+ if (_defaultValue != null) {
+ String defaultValue = _defaultValue.value();
+ column.setDefaultValue(defaultValue);
+ }
column.setPropertyName(
BinderHelper.getRelativePath( propertyHolder, inferredData.getPropertyName() )
diff --git a/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3JoinColumn.java b/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3JoinColumn.java
index e57636a..3d871f7 100644
--- a/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3JoinColumn.java
+++ b/hibernate-core/src/main/java/org/hibernate/cfg/Ejb3JoinColumn.java
@@ -423,6 +424,7 @@ public class Ejb3JoinColumn extends Ejb3Column {
getMappingColumn() != null ? getMappingColumn().isNullable() : false,
referencedColumn.getSqlType(),
getMappingColumn() != null ? getMappingColumn().isUnique() : false,
+ null, // default-value
false
);
linkWithValue( value );
@@ -502,6 +504,7 @@ public class Ejb3JoinColumn extends Ejb3Column {
getMappingColumn().isNullable(),
column.getSqlType(),
getMappingColumn().isUnique(),
+ null, // default-value
false //We do copy no strategy here
);
linkWithValue( value );
ঠিক আছে, এটি হাইবারনেট-একমাত্র সমাধান।