protected String jToSql(String javaName, JClass currentClass)
throws IOException, SchemaException {
JField jf = currentClass.getFieldByName(javaName);
if (jf == null)
throw new SchemaException(
"field " + javaName + " not a member of class " + currentClass.getClassName(),
currentClass.getSchemaFileName());
return jf.getSqlName();
}
/* override to insert constraint in table definition */
protected void writeCheckConstraint(JClass currentClass, String cons_name, JField jf)
throws IOException {
constraints +=
"\nalter table "
+ currentClass.getTableName()
+ " add constraint "
+ cons_name
+ " check ("
+ jf.getSqlName()
+ jf.getConstraint()
+ ");\n";
cleanupConstraints +=
"\nalter table " + currentClass.getTableName() + " drop constraint " + cons_name + " ;\n";
}
protected void writeForeignKey(
JClass currentClass, String cons_name, JField jf, JClass foreignClass) throws IOException {
constraints +=
"\nalter table "
+ currentClass.getTableName()
+ " add constraint "
+ cons_name
+ " foreign key ("
+ jf.getSqlName()
+ ") references "
+ foreignClass.getTableName()
+ "("
+ foreignClass.getPrimaryKey()
+ ");\n";
cleanupConstraints +=
"\nalter table " + currentClass.getTableName() + " drop constraint " + cons_name + " ;\n";
}
protected void addIndex(JClass currentClass, String sOut, JIndex index) {
constraints +=
"\ncreate index "
+ index.getName()
+ " on "
+ currentClass.getTableName()
+ " ("
+ sOut
+ ");\n";
}
public void inlineField(JClass currentClass, JCompositeField jcf, HashSet fieldNames)
throws IOException, SchemaException {
JClass fieldClass = jcf.getJClass();
Vector fields = new Vector(fieldClass.getAllFields().values());
String primaryKey = fieldClass.getPrimaryKey();
String prefix = jcf.getPrefix();
for (int i = 0; i < fields.size(); i++) {
JField jf = (JField) fields.elementAt(i);
String sqlName = jf.getSqlName();
if (!jf.isDbColumn() || sqlName.equals(primaryKey)) {
// do nothing ..
} else if (jf instanceof JCompositeField) {
throw new SchemaException(
"Composite Fields not allowed in inline objects", currentClass.getSchemaFileName());
} else
schemaFile.write(",\n\t" + prefix + "_" + sqlName + " " + getSqlOutType(currentClass, jf));
fieldNames.add(prefix + "_" + sqlName);
}
}
protected void addConstraint(
JClass currentClass, String consName, JConstraint jcons, String sOut) {
constraints +=
"\nalter table "
+ currentClass.getTableName()
+ " add constraint "
+ consName
+ " "
+ jcons.getType()
+ " ("
+ sOut
+ ");\n";
}
protected String convertFields(String fields, JClass currentClass)
throws SchemaException, IOException {
Vector tokens = Tokenizer.tokenize(fields, ",", "/");
Debugger.trace(fields + " token-size=" + tokens.size(), Debugger.VERBOSE);
String sOut;
if (tokens == null || tokens.size() < 1)
throw new SchemaException(
"Invalid constraint specification ", currentClass.getSchemaFileName());
else sOut = jToSql((String) tokens.elementAt(0), currentClass);
for (int j = 1; j < tokens.size(); j++) {
sOut += "," + jToSql((String) tokens.elementAt(j), currentClass);
}
return sOut;
}
public JAttribute newInstance(JClass clazz, Object owner, DataInputStream stream)
throws IOException {
String name = clazz.getConstantPool().lookupUtf8(stream.readShort());
Integer size = new Integer(stream.readInt());
Constructor constr = (Constructor) constructors.get(name);
if (constr == null) constr = defaultConstructor;
Object[] args = new Object[] {context, clazz, owner, name, size, stream};
try {
return (JAttribute) constr.newInstance(args);
} catch (InstantiationException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
}
}
/* write the schema line for one field*/
protected void writeFieldSchema(
JClass currentClass, JField jf, String primaryKey, boolean is_first)
throws IOException, SchemaException {
String sqlName = jf.getSqlName();
String fieldType = jf.getSqlType();
String sep = is_first ? "" : ",";
if (sqlName.equals(primaryKey)) {
schemaFile.write(sep);
writePrimaryKey(currentClass, sqlName);
} else {
schemaFile.write(sep + "\n\t" + sqlName + " " + getSqlOutType(currentClass, jf));
if (jf.isUnique()) writeUniqueConstraint(currentClass, jf);
if (jf.isRequired()) schemaFile.write(" not null");
else {
String dbSpecificOptions = getDbSpecificOptions(currentClass, jf, primaryKey);
if (dbSpecificOptions != null) schemaFile.write(" " + dbSpecificOptions);
}
}
if (jf instanceof JCompositeField
&& ((JCompositeField) jf).getJClass() != null
&& ((JCompositeField) jf).getJClass().isLeaf()) {
// is a foreign key and has a class to reference
JCompositeField jcf = ((JCompositeField) jf);
JClass foreignClass = jcf.getJClass();
String cons_name = jcf.getConstraintName();
if (!Checks.exists(cons_name)) {
cons_name = currentClass.getClassName() + jf.getJavaName();
if (cons_name.length() > 30) cons_name = cons_name.substring(cons_name.length() - 28);
}
cons_name = makeConstraintName(cons_name);
writeForeignKey(currentClass, cons_name, jf, foreignClass);
} else if (Checks.exists(jf.getConstraint())) {
String cons_name = jf.getConstraintName();
if (!Checks.exists(cons_name)) cons_name = "C_" + jf.getJavaName();
cons_name = makeConstraintName(cons_name);
writeCheckConstraint(currentClass, cons_name, jf);
}
}
public void generate(JClass currentClass) throws IOException, SchemaException {
schemaFile.write("\ncreate table " + currentClass.getTableName() + "(");
String primaryKey = currentClass.getPrimaryKey(); // the sql name
Vector allFields = new Vector(currentClass.getAllFields().values());
boolean is_first = true;
JField primField = null;
HashSet fieldNames = new HashSet();
if (Checks.exists(primaryKey)) { // set prim key first
primField = currentClass.getFieldByName(currentClass.getPrimaryKeyJava());
writeFieldSchema(currentClass, primField, primaryKey, is_first);
is_first = false;
fieldNames.add(primField.getSqlName());
}
for (int i = 0; i < allFields.size(); i++) {
JField jf = (JField) allFields.elementAt(i);
if (jf.isDbColumn() && jf != primField) {
if (jf instanceof JCompositeField && ((JCompositeField) jf).isInline()) {
// deal with inlining..
inlineField(currentClass, (JCompositeField) jf, fieldNames);
} else {
if (!fieldNames.contains(jf.getSqlName())) fieldNames.add(jf.getSqlName());
else
Debugger.trace(
"Duplicate column " + jf.getSqlName() + " in Class " + currentClass.getClassName(),
Debugger.ERROR);
writeFieldSchema(currentClass, jf, primaryKey, is_first);
}
is_first = false;
}
}
if (currentClass.isEndDateable()) schemaFile.write(",\n\t" + END_DATE + " " + END_DATE_TYPE);
if (currentClass.isVersioned()) schemaFile.write(",\n\t" + VERSION_NUMBER + " int");
schemaFile.write(");\n");
if (!currentClass.isManyToMany()) {
if (needsSequence()) {
cleanup.write(getDropSeqStmt(currentClass));
schemaFile.write("\ncreate sequence " + currentClass.getTableName() + "_seq;\n");
}
} else {
String columns = "";
boolean first_column = true;
for (int i = 0; i < allFields.size(); i++) {
JField jf = (JField) allFields.elementAt(i);
if (!jf.getSqlName().equalsIgnoreCase("")) {
if (!first_column) columns += ",";
else first_column = false;
columns += jf.getSqlName();
}
}
if (allFields.size() > 0) // && !isPostgres)
{
constraints +=
("\nalter table "
+ currentClass.getTableName()
+ " add constraint "
+ currentClass.getTableName()
+ "_unq primary key "
+ " ("
+ columns
+ ");\n");
}
}
Iterator cons = currentClass.getConstraints();
while (cons.hasNext()) {
JConstraint jcons = (JConstraint) cons.next();
String sOut = convertFields(jcons.getConstraint(), currentClass);
String consName = makeConstraintName(jcons.getName());
cleanUpConstraint(currentClass, consName);
addConstraint(currentClass, consName, jcons, sOut);
}
Iterator indexes = currentClass.getIndexes().iterator();
while (indexes.hasNext()) {
JIndex index = (JIndex) indexes.next();
String sOut = convertFields(index.getFields(), currentClass);
cleanUpIndex(currentClass, index);
addIndex(currentClass, sOut, index);
}
}
// override if neccessary ..
protected String getDropSeqStmt(JClass currentClass) {
return "\ndrop sequence " + currentClass.getTableName() + "_seq;\n";
}
protected void cleanUpConstraint(JClass currentClass, String consName) {
cleanupConstraints +=
"\nalter table " + currentClass.getTableName() + " drop constraint " + consName + ";\n";
}