/**
* Copyright 2006 Webmedia Group Ltd.
*
* 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.araneaframework.uilib.list.structure.filter.column;
import java.util.Map;
import org.araneaframework.backend.list.memorybased.Expression;
import org.araneaframework.backend.list.memorybased.expression.AlwaysTrueExpression;
import org.araneaframework.backend.list.memorybased.expression.compare.ComparedEqualsExpression;
import org.araneaframework.backend.list.memorybased.expression.compare.EqualsExpression;
import org.araneaframework.backend.list.memorybased.expression.compare.GreaterThanExpression;
import org.araneaframework.backend.list.memorybased.expression.compare.LikeExpression;
import org.araneaframework.backend.list.memorybased.expression.compare.LowerThanExpression;
import org.araneaframework.backend.list.memorybased.expression.constant.ValueExpression;
import org.araneaframework.backend.list.memorybased.expression.logical.OrExpression;
import org.araneaframework.backend.list.memorybased.expression.variable.VariableExpression;
import org.araneaframework.uilib.list.structure.ComparableType;
import org.araneaframework.uilib.list.structure.filter.ColumnFilter;
public abstract class SimpleColumnFilter extends ComparableType implements ColumnFilter {
private static final long serialVersionUID = 1L;
private String columnId;
private String filterInfoKey;
protected SimpleColumnFilter(String columnId) {
setColumnId(columnId);
}
protected SimpleColumnFilter() {
// empty constructor
}
public String getColumnId() {
return this.columnId;
}
public void setColumnId(String columnId) {
if (columnId == null) {
throw new RuntimeException("Column Id must be not null");
}
this.columnId = columnId;
if (this.filterInfoKey == null) {
this.filterInfoKey = columnId;
}
}
public String getFilterInfoKey() {
return this.filterInfoKey;
}
public void setFilterInfoKey(String filterInfoKey) {
this.filterInfoKey = filterInfoKey;
}
public Expression buildExpression(Map filterInfo) {
if (!isFilterActive(filterInfo)) {
return new AlwaysTrueExpression();
}
return buildAction(filterInfo, buildLeftOperand(filterInfo), buildRightOperand(filterInfo));
}
protected boolean isFilterActive(Map filterInfo) {
if (this.filterInfoKey == null) {
throw new RuntimeException("FilterInfo key must be provided");
}
return filterInfo.get(this.filterInfoKey) != null;
}
protected Expression buildLeftOperand(Map filterInfo) {
if (this.columnId == null) {
throw new RuntimeException("Column Id must be provided");
}
return new VariableExpression(this.columnId);
}
protected Expression buildRightOperand(Map filterInfo) {
if (this.filterInfoKey == null) {
throw new RuntimeException("FilterInfo key must be provided");
}
return new ValueExpression(this.filterInfoKey, filterInfo.get(this.filterInfoKey));
}
protected abstract Expression buildAction(Map filterInfo, Expression leftOperand, Expression rightOperand);
/*
* Subclasses
*/
public static class Equals extends SimpleColumnFilter {
private static final long serialVersionUID = 1L;
public Equals(String columnId) {
super(columnId);
}
public Equals() {
super();
}
protected Expression buildAction(Map filterInfo, Expression leftOperand, Expression rightOperand) {
if (isComparatorNatural()) {
return new EqualsExpression(leftOperand, rightOperand);
}
return new ComparedEqualsExpression(leftOperand, rightOperand, getComparator());
}
}
public static class GreaterThan extends SimpleColumnFilter {
private static final long serialVersionUID = 1L;
public GreaterThan(String columnId) {
super(columnId);
}
public GreaterThan() {
super();
}
protected Expression buildAction(Map filterInfo, Expression leftOperand, Expression rightOperand) {
return new GreaterThanExpression(leftOperand, rightOperand, getComparator());
}
}
public static class LowerThan extends SimpleColumnFilter {
private static final long serialVersionUID = 1L;
public LowerThan(String columnId) {
super(columnId);
}
public LowerThan() {
super();
}
protected Expression buildAction(Map filterInfo, Expression leftOperand, Expression rightOperand) {
return new LowerThanExpression(leftOperand, rightOperand, getComparator());
}
}
public static class GreaterThanOrEquals extends SimpleColumnFilter {
private static final long serialVersionUID = 1L;
public GreaterThanOrEquals(String columnId) {
super(columnId);
}
public GreaterThanOrEquals() {
super();
}
protected Expression buildAction(Map filterInfo, Expression leftOperand, Expression rightOperand) {
return new OrExpression().
add(new GreaterThanExpression(leftOperand, rightOperand, getComparator())).
add(new ComparedEqualsExpression(leftOperand, rightOperand, getComparator()));
}
}
public static class LowerThanOrEquals extends SimpleColumnFilter {
private static final long serialVersionUID = 1L;
public LowerThanOrEquals(String columnId) {
super(columnId);
}
public LowerThanOrEquals() {
super();
}
protected Expression buildAction(Map filterInfo, Expression leftOperand, Expression rightOperand) {
return new OrExpression().
add(new LowerThanExpression(leftOperand, rightOperand, getComparator())).
add(new ComparedEqualsExpression(leftOperand, rightOperand, getComparator()));
}
}
public static class Like extends SimpleColumnFilter {
private static final long serialVersionUID = 1L;
public Like(String columnId) {
super(columnId);
}
public Like() {
super();
}
protected Expression buildAction(Map filterInfo, Expression leftOperand, Expression rightOperand) {
return new LikeExpression(leftOperand, (ValueExpression) rightOperand, isIgnoreCase());
}
}
}