com.hazelcast.org.apache.calcite.sql.type.MultisetSqlType Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.org.apache.calcite.sql.type;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.rel.type.RelDataTypeFamily;
import com.hazelcast.org.apache.calcite.rel.type.RelDataTypePrecedenceList;
import static com.hazelcast.org.apache.calcite.sql.type.NonNullableAccessors.getComponentTypeOrThrow;
/**
* MultisetSqlType represents a standard SQL2003 multiset type.
*/
public class MultisetSqlType extends AbstractSqlType {
//~ Instance fields --------------------------------------------------------
private final RelDataType elementType;
//~ Constructors -----------------------------------------------------------
/**
* Constructs a new MultisetSqlType. This constructor should only be called
* from a factory method.
*/
public MultisetSqlType(RelDataType elementType, boolean isNullable) {
super(SqlTypeName.MULTISET, isNullable, null);
assert elementType != null;
this.elementType = elementType;
computeDigest();
}
//~ Methods ----------------------------------------------------------------
// implement RelDataTypeImpl
@Override protected void generateTypeString(StringBuilder sb, boolean withDetail) {
if (withDetail) {
sb.append(elementType.getFullTypeString());
} else {
sb.append(elementType.toString());
}
sb.append(" MULTISET");
}
// implement RelDataType
@Override public RelDataType getComponentType() {
return elementType;
}
// implement RelDataType
@Override public RelDataTypeFamily getFamily() {
// TODO jvs 2-Dec-2004: This gives each multiset type its
// own family. But that's not quite correct; the family should
// be based on the element type for proper comparability
// semantics (per 4.10.4 of SQL/2003). So either this should
// make up canonical families dynamically, or the
// comparison type-checking should not rely on this. I
// think the same goes for ROW types.
return this;
}
@Override public RelDataTypePrecedenceList getPrecedenceList() {
return new RelDataTypePrecedenceList() {
@Override public boolean containsType(RelDataType type) {
if (type.getSqlTypeName() != getSqlTypeName()) {
return false;
}
RelDataType otherComponentType = type.getComponentType();
return otherComponentType != null
&& getComponentType().getPrecedenceList().containsType(otherComponentType);
}
@Override public int compareTypePrecedence(RelDataType type1, RelDataType type2) {
if (!containsType(type1)) {
throw new IllegalArgumentException("must contain type: " + type1);
}
if (!containsType(type2)) {
throw new IllegalArgumentException("must contain type: " + type2);
}
return getComponentType().getPrecedenceList()
.compareTypePrecedence(
getComponentTypeOrThrow(type1),
getComponentTypeOrThrow(type2));
}
};
}
}