com.blazebit.persistence.parser.expression.WindowDefinition Maven / Gradle / Ivy
/*
* Copyright 2014 - 2021 Blazebit.
*
* 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 com.blazebit.persistence.parser.expression;
import com.blazebit.persistence.parser.predicate.Predicate;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* @author Christian Beikov
* @since 1.4.0
*/
public class WindowDefinition {
private final String windowName;
private final List partitionExpressions;
private final List orderByExpressions;
private Predicate filterPredicate;
private final WindowFrameMode frameMode;
private final WindowFramePositionType frameStartType;
private Expression frameStartExpression;
private final WindowFramePositionType frameEndType;
private Expression frameEndExpression;
private final WindowFrameExclusionType frameExclusionType;
public WindowDefinition(String windowName, Predicate filterPredicate) {
this.windowName = windowName;
this.partitionExpressions = Collections.emptyList();
this.filterPredicate = filterPredicate;
this.orderByExpressions = Collections.emptyList();
this.frameMode = null;
this.frameStartType = null;
this.frameStartExpression = null;
this.frameEndType = null;
this.frameEndExpression = null;
this.frameExclusionType = null;
}
public WindowDefinition(String windowName, List partitionExpressions, List orderByExpressions, Predicate filterPredicate,
WindowFrameMode frameMode, WindowFramePositionType frameStartType, Expression frameStartExpression, WindowFramePositionType frameEndType, Expression frameEndExpression, WindowFrameExclusionType frameExclusionType) {
this.windowName = windowName;
this.partitionExpressions = partitionExpressions;
this.orderByExpressions = orderByExpressions;
this.filterPredicate = filterPredicate;
this.frameMode = frameMode;
this.frameStartType = frameStartType;
this.frameStartExpression = frameStartExpression;
this.frameEndType = frameEndType;
this.frameEndExpression = frameEndExpression;
this.frameExclusionType = frameExclusionType;
}
public WindowDefinition copy(ExpressionCopyContext copyContext) {
int size = this.partitionExpressions.size();
List partitionExpressions = new ArrayList<>(size);
List expressions = this.partitionExpressions;
for (int i = 0; i < size; i++) {
partitionExpressions.add(expressions.get(i).copy(copyContext));
}
size = this.orderByExpressions.size();
List orderByExpressions = new ArrayList<>(size);
for (int i = 0; i < size; i++) {
orderByExpressions.add(this.orderByExpressions.get(i).copy(copyContext));
}
Predicate filterPredicate = null;
if (this.filterPredicate != null) {
filterPredicate = this.filterPredicate.copy(copyContext);
}
Expression frameStartExpression = null;
if (this.frameStartExpression != null) {
frameStartExpression = this.frameStartExpression.copy(copyContext);
}
Expression frameEndExpression = null;
if (this.frameEndExpression != null) {
frameEndExpression = this.frameEndExpression.copy(copyContext);
}
return new WindowDefinition(windowName, partitionExpressions, orderByExpressions, filterPredicate, frameMode, frameStartType, frameStartExpression, frameEndType, frameEndExpression, frameExclusionType);
}
public boolean isFilterOnly() {
return filterPredicate != null && windowName == null && partitionExpressions.isEmpty() && orderByExpressions.isEmpty() && frameMode == null && frameExclusionType == null;
}
public boolean isEmpty() {
return filterPredicate == null && windowName == null && partitionExpressions.isEmpty() && orderByExpressions.isEmpty() && frameMode == null && frameExclusionType == null;
}
public String getWindowName() {
return windowName;
}
public List getPartitionExpressions() {
return partitionExpressions;
}
public List getOrderByExpressions() {
return orderByExpressions;
}
public Predicate getFilterPredicate() {
return filterPredicate;
}
public void setFilterPredicate(Predicate filterPredicate) {
this.filterPredicate = filterPredicate;
}
public WindowFrameMode getFrameMode() {
return frameMode;
}
public WindowFramePositionType getFrameStartType() {
return frameStartType;
}
public Expression getFrameStartExpression() {
return frameStartExpression;
}
public void setFrameStartExpression(Expression frameStartExpression) {
this.frameStartExpression = frameStartExpression;
}
public WindowFramePositionType getFrameEndType() {
return frameEndType;
}
public Expression getFrameEndExpression() {
return frameEndExpression;
}
public void setFrameEndExpression(Expression frameEndExpression) {
this.frameEndExpression = frameEndExpression;
}
public WindowFrameExclusionType getFrameExclusionType() {
return frameExclusionType;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((windowName == null) ? 0 : windowName.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
WindowDefinition other = (WindowDefinition) obj;
if (windowName == null) {
if (other.windowName != null) {
return false;
}
} else if (!windowName.equals(other.windowName)) {
return false;
}
return true;
}
}