package org.nutz.dao.impl.jdbc.oracle;
import java.sql.Clob;
import java.util.ArrayList;
import java.util.List;
import org.nutz.dao.DB;
import org.nutz.dao.Dao;
import org.nutz.dao.Sqls;
import org.nutz.dao.entity.Entity;
import org.nutz.dao.entity.MappingField;
import org.nutz.dao.entity.PkType;
import org.nutz.dao.impl.jdbc.AbstractJdbcExpert;
import org.nutz.dao.jdbc.JdbcExpertConfigFile;
import org.nutz.dao.jdbc.Jdbcs;
import org.nutz.dao.jdbc.ValueAdaptor;
import org.nutz.dao.pager.Pager;
import org.nutz.dao.sql.Pojo;
import org.nutz.dao.sql.Sql;
import org.nutz.dao.util.Pojos;
public class OracleJdbcExpert extends AbstractJdbcExpert {
private static String CSEQ = "CREATE SEQUENCE ${T}_${F}_SEQ MINVALUE 1"
+ " MAXVALUE 999999999999 INCREMENT BY 1 START"
+ " WITH 1 CACHE 20 NOORDER NOCYCLE";
private static String DSEQ = "DROP SEQUENCE ${T}_${F}_SEQ";
private static String CTRI = "create or replace trigger ${T}_${F}_ST"
+ " BEFORE INSERT ON ${T}"
+ " FOR EACH ROW"
+ " BEGIN "
+ " IF :new.${F} IS NULL THEN"
+ " SELECT ${T}_${F}_seq.nextval into :new.${F} FROM dual;"
+ " END IF;"
+ " END ${T}_${F}_ST;";
public OracleJdbcExpert(JdbcExpertConfigFile conf) {
super(conf);
}
public ValueAdaptor getAdaptor(MappingField ef) {
if (ef.getTypeMirror().isBoolean())
return new OracleBooleanAdaptor();
if (Clob.class.isAssignableFrom(ef.getTypeClass()))
return new OracleClobAdapter(Jdbcs.getFilePool());
return super.getAdaptor(ef);
}
public boolean createEntity(Dao dao, Entity<?> en) {
StringBuilder sb = new StringBuilder("CREATE TABLE " + en.getTableName() + "(");
// 创建字段
for (MappingField mf : en.getMappingFields()) {
sb.append('\n').append(mf.getColumnName());
sb.append(' ').append(evalFieldType(mf));
// 非主键的 @Name，应该加入唯一性约束
if (mf.isName() && en.getPkType() != PkType.NAME) {
sb.append(" NOT NULL UNIQUE");
}
// 普通字段
else {
if (mf.isPk() && en.getPks().size() == 1)
sb.append(" primary key ");
if (mf.isNotNull())
sb.append(" NOT NULL");
if (mf.hasDefaultValue())
sb.append(" DEFAULT '").append(getDefaultValue(mf)).append('\'');
if (mf.isUnsigned()) // 有点暴力
sb.append(" Check ( ").append(mf.getColumnName()).append(" >= 0)");
}
sb.append(',');
}
// 结束表字段设置
sb.setCharAt(sb.length() - 1, ')');
List<Sql> sqls = new ArrayList<Sql>();
sqls.add(Sqls.create(sb.toString()));
// 创建复合主键
List<MappingField> pks = en.getPks();
if (pks.size() > 1) {
StringBuilder pkNames = new StringBuilder();
for (MappingField pk : pks) {
pkNames.append(pk.getColumnName()).append(',');
}
pkNames.setLength(pkNames.length() - 1);
String pkNames2 = makePksName(en);
String sql = String.format("alter table %s add constraint primary_key_%s primary key (%s)",
en.getTableName(),
pkNames2,
pkNames);
sqls.add(Sqls.create(sql));
}
// // 处理非主键unique
// for (MappingField mf : en.getMappingFields()) {
// if(!mf.isPk())
// continue;
// String sql =
// gSQL("alter table ${T} add constraint unique_key_${F} unique (${F});",
// en.getTableName(),mf.getColumnName());
// sqls.add(Sqls.create(sql));
// }
// 处理AutoIncreasement
for (MappingField mf : en.getMappingFields()) {
if (!mf.isAutoIncreasement())
continue;
// 序列
sqls.add(Sqls.create(gSQL(CSEQ, en.getTableName(), mf.getColumnName())));
// 触发器
sqls.add(Sqls.create(gSQL(CTRI, en.getTableName(), mf.getColumnName())));
}
// 创建索引
sqls.addAll(createIndexs(en));
// TODO 详细处理Clob
// TODO 详细处理Blob
// 执行创建语句
dao.execute(sqls.toArray(new Sql[sqls.size()]));
// 创建关联表
createRelation(dao, en);
// 添加注释(表注释与字段注释)
addComment(dao, en);
return true;
}
public void formatQuery(Pojo pojo) {
Pager pager = pojo.getContext().getPager();
// 需要进行分页
if (null != pager && pager.getPageNumber() > 0) {
pojo.insertFirst(Pojos.Items.wrap("SELECT * FROM (SELECT T.*, ROWNUM RN FROM ("));
pojo.append(Pojos.Items.wrapf(") T WHERE ROWNUM <= %d) WHERE RN > %d",
pager.getOffset() + pager.getPageSize(),
pager.getOffset()));
}
}
@Override
public void formatQuery(Sql sql) {
Pager pager = sql.getContext().getPager();
// 需要进行分页
if (null != pager && pager.getPageNumber() > 0) {
String pre = "SELECT * FROM (SELECT T.*, ROWNUM RN FROM (";
String last = String.format(") T WHERE ROWNUM <= %d) WHERE RN > %d",
pager.getOffset() + pager.getPageSize(),
pager.getOffset());
sql.setSourceSql(pre + sql.getSourceSql() + last);
}
}
public String getDatabaseType() {
return DB.ORACLE.name();
}
@Override
protected String evalFieldType(MappingField mf) {
if (mf.getCustomDbType() != null)
return mf.getCustomDbType();
switch (mf.getColumnType()) {
case BOOLEAN:
return "char(1) check (" + mf.getColumnName() + " in(0,1))";
case TEXT:
return "CLOB";
case VARCHAR:
return "VARCHAR2(" + mf.getWidth() + ")";
case INT:
// 用户自定义了宽度
if (mf.getWidth() > 0)
return "NUMBER(" + mf.getWidth() + ")";
// 用数据库的默认宽度
return "NUMBER";
case FLOAT:
// 用户自定义了精度
if (mf.getWidth() > 0 && mf.getPrecision() > 0) {
return "NUMBER(" + mf.getWidth() + "," + mf.getPrecision() + ")";
}
// 用默认精度
if (mf.getTypeMirror().isDouble())
return "NUMBER(15,10)";
return "NUMBER";
case TIME:
case DATETIME:
case DATE:
return "DATE";
default:
return super.evalFieldType(mf);
}
}
@Override
protected String createResultSetMetaSql(Entity<?> en) {
return "select * from " + en.getViewName() + " where rownum <= 1";
}
@Override
public boolean dropEntity(Dao dao, Entity<?> en) {
if (super.dropEntity(dao, en)) {
if (en.getPks().isEmpty())
return true;
List<Sql> sqls = new ArrayList<Sql>();
for (MappingField pk : en.getPks()) {
if (pk.isAutoIncreasement()) {
String sql = gSQL(DSEQ, en.getTableName(), pk.getColumnName());
sqls.add(Sqls.create(sql));
}
}
try {
dao.execute(sqls.toArray(new Sql[sqls.size()]));
return true;
}
catch (Exception e) {}
}
return false;
}
public boolean isSupportAutoIncrement() {
return false;
}
}