/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.jaqu;
import java.util.ArrayList;
import org.h2.jaqu.util.ClassUtils;
import org.h2.util.New;
/**
* This class represents a table in a query.
*
* @param <T> the table class
*/
class SelectTable<T> {
private static int asCounter;
private final Query<T> query;
private final Class<T> clazz;
private T current;
private final String as;
private final TableDefinition<T> aliasDef;
private final boolean outerJoin;
private final ArrayList<Token> joinConditions = New.arrayList();
private final T alias;
@SuppressWarnings("unchecked")
SelectTable(Db db, Query<T> query, T alias, boolean outerJoin) {
this.alias = alias;
this.query = query;
this.outerJoin = outerJoin;
aliasDef = (TableDefinition<T>) db.getTableDefinition(alias.getClass());
clazz = ClassUtils.getClass(alias);
as = "T" + asCounter++;
}
T getAlias() {
return alias;
}
T newObject() {
return ClassUtils.newObject(clazz);
}
TableDefinition<T> getAliasDefinition() {
return aliasDef;
}
void appendSQL(SQLStatement stat) {
if (query.isJoin()) {
stat.appendTable(aliasDef.schemaName, aliasDef.tableName)
.appendSQL(" AS " + as);
} else {
stat.appendTable(aliasDef.schemaName, aliasDef.tableName);
}
}
void appendSQLAsJoin(SQLStatement stat, Query<T> q) {
if (outerJoin) {
stat.appendSQL(" LEFT OUTER JOIN ");
} else {
stat.appendSQL(" INNER JOIN ");
}
appendSQL(stat);
if (!joinConditions.isEmpty()) {
stat.appendSQL(" ON ");
for (Token token : joinConditions) {
token.appendSQL(stat, q);
stat.appendSQL(" ");
}
}
}
boolean getOuterJoin() {
return outerJoin;
}
Query<T> getQuery() {
return query;
}
String getAs() {
return as;
}
void addConditionToken(Token condition) {
joinConditions.add(condition);
}
T getCurrent() {
return current;
}
void setCurrent(T current) {
this.current = current;
}
}