/*
* Copyright (c) 2011. The Apache Software Foundation
*
* 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.expreval.expr.instmt;
import org.apache.expreval.client.NullColumnValueException;
import org.apache.expreval.client.ResultMissingColumnException;
import org.apache.expreval.expr.ExpressionType;
import org.apache.expreval.expr.NotValue;
import org.apache.expreval.expr.node.BooleanValue;
import org.apache.expreval.expr.node.GenericValue;
import org.apache.hadoop.hbase.filter.WritableByteArrayComparable;
import org.apache.hadoop.hbase.hbql.client.HBqlException;
import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
import org.apache.hadoop.hbase.hbql.impl.InvalidServerFilterException;
import java.util.List;
public abstract class GenericInStmt extends NotValue<GenericInStmt> implements BooleanValue {
protected GenericInStmt(final GenericValue arg0, final boolean not, final List<GenericValue> inList) {
super(ExpressionType.INSTMT, not, arg0, inList);
}
protected abstract boolean evaluateInList(final Object object) throws HBqlException,
ResultMissingColumnException,
NullColumnValueException;
protected List<GenericValue> getInList() {
return this.getSubArgs(1);
}
public Boolean getValue(final HConnectionImpl conn, final Object object) throws HBqlException,
ResultMissingColumnException,
NullColumnValueException {
final boolean retval = this.evaluateInList(object);
return (this.isNot()) ? !retval : retval;
}
public Class<? extends GenericValue> validateTypes(final GenericValue parentExpr,
final boolean allowCollections) throws HBqlException {
return BooleanValue.class;
}
public String asString() {
final StringBuilder sbuf = new StringBuilder(this.getExprArg(0).asString() + notAsString() + " IN (");
boolean first = true;
for (final GenericValue valueExpr : this.getInList()) {
if (!first)
sbuf.append(", ");
sbuf.append(valueExpr.asString());
first = false;
}
sbuf.append(")");
return sbuf.toString();
}
private boolean inListIsConstant() {
for (final GenericValue valueExpr : this.getInList()) {
if (!valueExpr.isAConstant())
return false;
}
return true;
}
protected abstract static class GenericInComparable<T> extends WritableByteArrayComparable {
private List<T> inValues;
protected List<T> getInValues() {
return this.inValues;
}
protected void setInValue(final List<T> inValues) {
this.inValues = inValues;
}
}
protected void validateArgsForInFilter() throws InvalidServerFilterException {
if (this.getExprArg(0).isAColumnReference() && this.inListIsConstant())
return;
throw new InvalidServerFilterException("Filter requires a column reference and list of constants");
}
}