org.liveSense.api.sql.HSqlDbExecute Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.liveSense.service.dataSourceProvider Show documentation
Simple DBCP pooled datasource provider.
The newest version!
package org.liveSense.api.sql;

import java.util.List;

import org.liveSense.api.sql.exceptions.SQLException;
import org.liveSense.misc.queryBuilder.clauses.DefaultLimitClause;
import org.liveSense.misc.queryBuilder.domains.LimitClause;
import org.liveSense.misc.queryBuilder.domains.OrderByClause;
import org.liveSense.misc.queryBuilder.exceptions.QueryBuilderException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class HSqlDbExecute extends SQLExecute {

	@SuppressWarnings("unused")
	private static final Logger log = LoggerFactory.getLogger(HSqlDbExecute.class);
	private int maxSize = -1;
	
	public HSqlDbExecute(int maxSize) {
		this.maxSize = maxSize;
	}
	
	private ClauseHelper makeSubSelective(ClauseHelper helper, String tableAlias) {
		helper.setQuery("SELECT * FROM ("+helper.getQuery()+") "+tableAlias);
		helper.setSubSelect(true);
		return helper;
	}
	
	/**
	 * {@inheritDoc}
	 * @throws QueryBuilderException 
	 * @see {@link SQLExecute#addWhereClause(SQLExecute.ClauseHelper)}
	 */
	public ClauseHelper addWhereClause(ClauseHelper helper) throws SQLException, QueryBuilderException {
		return addWhereClause(helper, "");
	}

	/**
	 * {@inheritDoc}
	 * @throws QueryBuilderException 
	 * @param String tableAlias
	 * @see {@link SQLExecute#addWhereClause(SQLExecute.ClauseHelper)}
	 */
	public ClauseHelper addWhereClause(ClauseHelper helper, String tableAlias) throws SQLException, QueryBuilderException {
		String whereClause = builder.buildWhere(helper.getClazz(), builder.getWhere());
		if (!"".equals(whereClause)) {			
			if (!helper.getSubSelect()) {
				 makeSubSelective(helper, tableAlias);
			}			
			helper.setQuery(helper.getQuery()+ " WHERE "+whereClause);
		}
		return helper;
	}
	
	/**
	 * {@inheritDoc}
	 * @throws SQLException
	 * @see {@link SQLExecute#addLimitClause(SQLExecute.ClauseHelper)}
	 */
	public ClauseHelper addLimitClause(ClauseHelper helper) throws SQLException {
		return addLimitClause(helper, "");
	}	
	
	/**
	 * {@inheritDoc}
	 * @throws SQLException
	 * @param String tableAlias 
	 * @see {@link SQLExecute#addLimitClause(SQLExecute.ClauseHelper)}
	 */
	public ClauseHelper addLimitClause(ClauseHelper helper, String tableAlias) throws SQLException {
		LimitClause limit = builder.getLimit();
		if (limit == null) 
			limit = new DefaultLimitClause(maxSize, 0);
		
		if (maxSize > 0 && limit.getLimit() > maxSize && limit.getLimit() > 0) {
			limit.setLimit(maxSize);			
		}
		
		int l = limit.getLimit();
		int o = limit.getOffset();
		if (l < 1 && o < 1)
			return helper;
					
		if (!helper.getSubSelect()) {
			makeSubSelective(helper, tableAlias);
		}
		
		if (limit.getLimit() > 0) {
			helper.setQuery(helper.getQuery()+ " LIMIT "+l);
		}
		if (limit.getOffset() > 0) {
			helper.setQuery(helper.getQuery()+ " OFFSET "+o);
		}

		return helper;
	}
	
	/**
	 * {@inheritDoc}
	 * @throws SQLException 
	 * @see {@link SQLExecute#addOrderByClause(SQLExecute.ClauseHelper)}
	 */
	public ClauseHelper addOrderByClause(ClauseHelper helper) throws SQLException {
		return addOrderByClause(helper,"");
	}
	
	/**
	 * {@inheritDoc}
	 * @throws SQLException 
	 * @see {@link SQLExecute#addOrderByClause(SQLExecute.ClauseHelper)}
	 */
	public ClauseHelper addOrderByClause(ClauseHelper helper, String tableAlias) throws SQLException {	
		List orderby = builder.getOrderBy();
		if ((orderby == null) || (orderby.size() == 0))
			return helper;
		
		if (!helper.getSubSelect()) {
			makeSubSelective(helper, tableAlias);
		}		
						
		boolean first = true;
		StringBuffer sb = new StringBuffer(" ORDER BY ");
		for (OrderByClause orderByClause : orderby) {
			if (first) { first = false;	} 
			else { sb.append(","); }
			sb.append(orderByClause.getFieldName());
			if (orderByClause.getSortDesc() != null) { 
				sb.append(orderByClause.getSortDesc() ? " DESC" : " ASC");
			}
		}
		helper.setQuery(helper.getQuery() + sb.toString());		
		
		return helper;
	}
	
	@SuppressWarnings("rawtypes")
	@Override
	public String getSelectQuery(Class clazz) throws SQLException, QueryBuilderException {
		return getSelectQuery(clazz, "");
	}
	
	@SuppressWarnings("rawtypes")
	@Override
	public String getSelectQuery(Class clazz, String tableAlias) throws SQLException, QueryBuilderException {
		ClauseHelper helper = new ClauseHelper(clazz, builder.getQuery(tableAlias), false);
		ClauseHelper cls = 
			addLimitClause(addOrderByClause(addWhereClause(helper,tableAlias),tableAlias),tableAlias);
		return cls.getQuery();
	}	
	
	@SuppressWarnings("rawtypes")
	@Override
	public String getLockQuery(Class clazz) throws SQLException, QueryBuilderException {
		return getLockQuery(clazz, "");
	}
	
	@SuppressWarnings("rawtypes")
	@Override
	public String getLockQuery(Class clazz, String tableAlias) throws SQLException, QueryBuilderException {
		throw new QueryBuilderException("Record level lock is unsupported by HSQLDB");
	}
	
	@Override
	public String getBlobName(){
		return "LONGVARCHAR";
	}
	
}