/*
* 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 org.apache.vxquery.functions;
import javax.xml.namespace.QName;
import org.apache.vxquery.exceptions.ErrorCode;
import org.apache.vxquery.exceptions.SystemException;
import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
import edu.uci.ics.hyracks.algebricks.core.algebra.functions.IFunctionInfo;
import edu.uci.ics.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
import edu.uci.ics.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
import edu.uci.ics.hyracks.algebricks.runtime.base.IUnnestingEvaluatorFactory;
public abstract class Function implements IFunctionInfo {
private static final String VXQUERY = "vxquery";
protected final FunctionIdentifier fid;
protected final QName qname;
protected final Signature signature;
public Function(QName qname, Signature signature) {
this.fid = new FunctionIdentifier(VXQUERY, "{" + qname.getNamespaceURI() + "}" + qname.getLocalPart());
this.qname = qname;
this.signature = signature;
}
@Override
public final FunctionIdentifier getFunctionIdentifier() {
return fid;
}
public abstract FunctionTag getTag();
public abstract boolean useContextImplicitly();
public IScalarEvaluatorFactory createScalarEvaluatorFactory(IScalarEvaluatorFactory[] args) throws SystemException {
throw new SystemException(ErrorCode.SYSE0001, "No IScalarEvaluatorFactory runtime for " + fid.getName());
}
public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(IScalarEvaluatorFactory[] args)
throws SystemException {
throw new SystemException(ErrorCode.SYSE0001, "No IAggregateEvaluatorFactory runtime for " + fid.getName());
}
public IUnnestingEvaluatorFactory createUnnestingEvaluatorFactory(IScalarEvaluatorFactory[] args)
throws SystemException {
throw new SystemException(ErrorCode.SYSE0001, "No IUnnestingEvaluatorFactory runtime for " + fid.getName());
}
public QName getName() {
return qname;
}
public Signature getSignature() {
return signature;
}
public enum FunctionTag {
BUILTIN,
OPERATOR,
EXTERNAL,
UDXQUERY,
}
}