/*
* Copyright 2014 Red Hat, Inc. and/or its affiliates.
*
* Licensed 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.dashbuilder.dataset.engine.filter;
import java.util.ArrayList;
import java.util.List;
import org.dashbuilder.dataset.filter.LogicalExprFilter;
import org.dashbuilder.dataset.filter.LogicalExprType;
public class LogicalFunction extends DataSetFunction {
private LogicalExprFilter logicalFunctionFilter;
private List<DataSetFunction> functionTerms = new ArrayList<DataSetFunction>();
public LogicalFunction(DataSetFilterContext ctx, LogicalExprFilter filter) {
super(ctx, filter);
this.logicalFunctionFilter = filter;
}
public LogicalFunction addFunctionTerm(DataSetFunction functionTerm) {
functionTerms.add(functionTerm);
return this;
}
public boolean pass() {
if (functionTerms .isEmpty()) {
return true;
}
LogicalExprType type = logicalFunctionFilter.getLogicalOperator();
if (LogicalExprType.NOT.equals(type)) {
for (DataSetFunction term : functionTerms) {
boolean termOk = term.pass();
if (termOk) return false;
}
return true;
}
if (LogicalExprType.AND.equals(type)) {
for (DataSetFunction term : functionTerms) {
boolean termOk = term.pass();
if (!termOk) return false;
}
return true;
}
if (LogicalExprType.OR.equals(type)) {
for (DataSetFunction term : functionTerms) {
boolean termOk = term.pass();
if (termOk) return true;
}
return false;
}
throw new IllegalArgumentException("Logical operator not supported: " + type);
}
}