/*
* 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.filter;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.dashbuilder.dataset.ColumnType;
import org.dashbuilder.dataset.group.DateIntervalType;
import org.dashbuilder.dataset.date.TimeFrame;
/**
* A factory of filter functions
*/
public class FilterFactory {
// Core filter functions
public static ColumnFilter isNull() {
return isNull(null);
}
public static ColumnFilter isNull(String columnId) {
return new CoreFunctionFilter(columnId, CoreFunctionType.IS_NULL);
}
public static ColumnFilter notNull() {
return notNull(null);
}
public static ColumnFilter notNull(String columnId) {
return new CoreFunctionFilter(columnId, CoreFunctionType.NOT_NULL);
}
public static ColumnFilter equalsTo(Comparable allowedValue) {
return equalsTo(null, allowedValue);
}
public static ColumnFilter equalsTo(String columnId, Comparable allowedValue) {
return new CoreFunctionFilter(columnId, CoreFunctionType.EQUALS_TO, allowedValue);
}
public static ColumnFilter equalsTo(String columnId, List<Comparable> allowedValues) {
return new CoreFunctionFilter(columnId, CoreFunctionType.EQUALS_TO, allowedValues);
}
public static ColumnFilter likeTo(String columnId, String searchPattern) {
return likeTo(columnId, searchPattern, true);
}
public static ColumnFilter likeTo(String columnId, String searchPattern, boolean caseSensitive) {
return new CoreFunctionFilter(columnId, CoreFunctionType.LIKE_TO, searchPattern, caseSensitive);
}
public static ColumnFilter notEqualsTo(Comparable allowedValue) {
return notEqualsTo(null, allowedValue);
}
public static ColumnFilter notEqualsTo(String columnId, Comparable allowedValue) {
return new CoreFunctionFilter(columnId, CoreFunctionType.NOT_EQUALS_TO, allowedValue);
}
public static ColumnFilter lowerThan(Comparable ref) {
return lowerThan(null, ref);
}
public static ColumnFilter lowerThan(String columnId, Comparable ref) {
if (ref instanceof Number) ref = ((Number) ref).doubleValue();
return new CoreFunctionFilter(columnId, CoreFunctionType.LOWER_THAN, ref);
}
public static ColumnFilter lowerOrEqualsTo(Comparable ref) {
return lowerOrEqualsTo(null, ref);
}
public static ColumnFilter lowerOrEqualsTo(String columnId, Comparable ref) {
if (ref instanceof Number) ref = ((Number) ref).doubleValue();
return new CoreFunctionFilter(columnId, CoreFunctionType.LOWER_OR_EQUALS_TO, ref);
}
public static ColumnFilter greaterThan(Comparable ref) {
return greaterThan(null, ref);
}
public static ColumnFilter greaterThan(String columnId, Comparable ref) {
if (ref instanceof Number) ref = ((Number) ref).doubleValue();
return new CoreFunctionFilter(columnId, CoreFunctionType.GREATER_THAN, ref);
}
public static ColumnFilter greaterOrEqualsTo(Comparable ref) {
return greaterOrEqualsTo(null, ref);
}
public static ColumnFilter greaterOrEqualsTo(String columnId, Comparable ref) {
if (ref instanceof Number) ref = ((Number) ref).doubleValue();
return new CoreFunctionFilter(columnId, CoreFunctionType.GREATER_OR_EQUALS_TO, ref);
}
public static ColumnFilter between(Comparable low, Comparable high) {
return between(null, low, high);
}
public static ColumnFilter between(String columnId, Comparable low, Comparable high) {
if (low instanceof Number) low = ((Number) low).doubleValue();
if (high instanceof Number) high = ((Number) high).doubleValue();
return new CoreFunctionFilter(columnId, CoreFunctionType.BETWEEN, low, high);
}
/**
* @see TimeFrame
*/
public static ColumnFilter timeFrame(String timeFrame) {
return timeFrame(null, timeFrame);
}
/**
* @see TimeFrame
*/
public static ColumnFilter timeFrame(String columnId, String timeFrame) {
TimeFrame tf = TimeFrame.parse(timeFrame);
if (tf == null) throw new IllegalArgumentException("Invalid time frame: " + timeFrame);
return new CoreFunctionFilter(columnId, CoreFunctionType.TIME_FRAME, timeFrame);
}
public static ColumnFilter in(String columnId, List<?> allowedValues) {
return new CoreFunctionFilter(columnId, CoreFunctionType.IN, allowedValues);
}
public static ColumnFilter notIn(String columnId, List<?> allowedValues) {
return new CoreFunctionFilter(columnId, CoreFunctionType.NOT_IN, allowedValues);
}
// Boolean operators
public static ColumnFilter AND(List<ColumnFilter> filters) {
return AND(null, filters);
}
public static ColumnFilter AND(ColumnFilter... filters) {
return AND(null, filters);
}
public static ColumnFilter AND(String columnId, List<ColumnFilter> filters) {
return new LogicalExprFilter(columnId, LogicalExprType.AND, filters);
}
public static ColumnFilter AND(String columnId, ColumnFilter... filters) {
return new LogicalExprFilter(columnId, LogicalExprType.AND, filters);
}
public static ColumnFilter OR(List<ColumnFilter> filters) {
return OR(null, filters);
}
public static ColumnFilter OR(ColumnFilter... filters) {
return OR(null, filters);
}
public static ColumnFilter OR(String columnId, List<ColumnFilter> filters) {
return new LogicalExprFilter(columnId, LogicalExprType.OR, filters);
}
public static ColumnFilter OR(String columnId, ColumnFilter... filters) {
return new LogicalExprFilter(columnId, LogicalExprType.OR, filters);
}
public static ColumnFilter NOT(List<ColumnFilter> filters) {
return NOT(null, filters);
}
public static ColumnFilter NOT(ColumnFilter... filters) {
return NOT(null, filters);
}
public static ColumnFilter NOT(String columnId, List<ColumnFilter> filters) {
return new LogicalExprFilter(columnId, LogicalExprType.NOT, filters);
}
public static ColumnFilter NOT(String columnId, ColumnFilter... filters) {
return new LogicalExprFilter(columnId, LogicalExprType.NOT, filters);
}
public static CoreFunctionFilter createCoreFunctionFilter(String columnId, ColumnType columnType, CoreFunctionType functionType) {
List params = createParameters(columnType, functionType);
CoreFunctionFilter columnFilter = new CoreFunctionFilter();
columnFilter.setColumnId(columnId);
columnFilter.setType(functionType);
columnFilter.setParameters(params);
return columnFilter;
}
public static List createParameters(ColumnType columnType, CoreFunctionType functionType) {
List result = new ArrayList();
if (CoreFunctionType.LIKE_TO.equals(functionType)) {
result.add("%Text%");
result.add(true);
return result;
}
int n = functionType.getParametersCount();
for (int i=0; i<n; i++) {
if (ColumnType.NUMBER.equals(columnType)) {
result.add(100000d * i);
}
else if (ColumnType.DATE.equals(columnType)) {
if (CoreFunctionType.TIME_FRAME.equals(functionType)) {
result.add("begin[year] till end[year]");
}
else {
Date d = new Date();
d.setYear(d.getYear()-n+i+1);
result.add(d);
}
} else {
result.add("value" + (i + 1));
}
}
return result;
}
// Custom filter
public static ColumnFilter function(String columnId, FilterFunction function) {
return new CustomFunctionFilter(columnId, function);
}
}