| /** |
| * 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.tajo.algebra; |
| |
| import com.google.common.base.Objects; |
| import com.google.gson.annotations.Expose; |
| import org.apache.tajo.util.TUtil; |
| |
| public class WindowSpec implements Cloneable { |
| @Expose private String windowName; |
| @Expose private Expr [] partitionKeys; // OVER (PARTITION BY ?,...,?) |
| @Expose private Sort.SortSpec [] sortSpecs; // OVER (... ORDER BY ?,...,?) |
| @Expose private WindowFrame windowFrame; |
| |
| public boolean hasWindowName() { |
| return windowName != null; |
| } |
| |
| public void setWindowName(String windowName) { |
| this.windowName = windowName; |
| } |
| |
| public String getWindowName() { |
| return this.windowName; |
| } |
| |
| public boolean hasPartitionBy() { |
| return this.partitionKeys != null; |
| } |
| |
| public void setPartitionKeys(Expr[] partitionKeys) { |
| this.partitionKeys = partitionKeys; |
| } |
| |
| public Expr [] getPartitionKeys() { |
| return this.partitionKeys; |
| } |
| |
| public boolean hasOrderBy() { |
| return this.sortSpecs != null; |
| } |
| |
| public void setSortSpecs(Sort.SortSpec [] sortSpecs) { |
| this.sortSpecs = sortSpecs; |
| } |
| |
| public Sort.SortSpec [] getSortSpecs() { |
| return this.sortSpecs; |
| } |
| |
| public boolean hasWindowFrame() { |
| return windowFrame != null; |
| } |
| |
| public void setWindowFrame(WindowFrame frame) { |
| this.windowFrame = frame; |
| } |
| |
| public WindowFrame getWindowFrame() { |
| return windowFrame; |
| } |
| |
| public Object clone() throws CloneNotSupportedException { |
| WindowSpec windowSpec = (WindowSpec) super.clone(); |
| windowSpec.windowName = windowName; |
| if (hasPartitionBy()) { |
| windowSpec.partitionKeys = new Expr[windowSpec.partitionKeys.length]; |
| for (int i = 0; i < partitionKeys.length; i++) { |
| windowSpec.partitionKeys[i] = (Expr) partitionKeys[i].clone(); |
| } |
| } |
| if (hasOrderBy()) { |
| windowSpec.sortSpecs = new Sort.SortSpec[sortSpecs.length]; |
| for (int i = 0; i < sortSpecs.length; i++) { |
| windowSpec.sortSpecs[i] = (Sort.SortSpec) sortSpecs[i].clone(); |
| } |
| } |
| if (hasWindowFrame()) { |
| windowSpec.windowFrame = (WindowFrame) windowFrame.clone(); |
| } |
| return windowSpec; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(windowName, partitionKeys, sortSpecs); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| |
| if (obj instanceof WindowSpec) { |
| WindowSpec another = (WindowSpec) obj; |
| return TUtil.checkEquals(windowName, another.windowName) && |
| TUtil.checkEquals(partitionKeys, another.partitionKeys) && |
| TUtil.checkEquals(sortSpecs, another.sortSpecs) && |
| TUtil.checkEquals(windowFrame, another.windowFrame); |
| } else { |
| return false; |
| } |
| |
| } |
| |
| public static enum WindowFrameUnit { |
| ROW, |
| RANGE |
| } |
| |
| public static enum WindowFrameStartBoundType { |
| UNBOUNDED_PRECEDING, |
| CURRENT_ROW, |
| PRECEDING |
| } |
| |
| public static enum WindowFrameEndBoundType { |
| UNBOUNDED_FOLLOWING, |
| CURRENT_ROW, |
| FOLLOWING |
| } |
| |
| public static class WindowFrame implements Cloneable { |
| @Expose private WindowFrameUnit unit; |
| @Expose private WindowStartBound startBound; |
| @Expose private WindowEndBound endBound; |
| |
| public WindowFrame(WindowFrameUnit unit, WindowStartBound startBound) { |
| this.unit = unit; |
| this.startBound = startBound; |
| } |
| |
| public WindowFrame(WindowFrameUnit unit, WindowStartBound startBound, WindowEndBound endBound) { |
| this(unit, startBound); |
| this.endBound = endBound; |
| } |
| |
| public WindowStartBound getStartBound() { |
| return startBound; |
| } |
| |
| public boolean hasEndBound() { |
| return endBound != null; |
| } |
| |
| public WindowEndBound getEndBound() { |
| return endBound; |
| } |
| |
| @Override |
| public Object clone() throws CloneNotSupportedException { |
| WindowFrame frame = (WindowFrame) super.clone(); |
| frame.unit = unit; |
| frame.startBound = (WindowStartBound) startBound.clone(); |
| frame.endBound = (WindowEndBound) endBound.clone(); |
| return frame; |
| } |
| } |
| |
| public static class WindowStartBound implements Cloneable { |
| @Expose private WindowFrameStartBoundType boundType; |
| @Expose private Expr number; |
| |
| public WindowStartBound(WindowFrameStartBoundType type) { |
| this.boundType = type; |
| } |
| |
| public WindowFrameStartBoundType getBoundType() { |
| return boundType; |
| } |
| |
| public boolean hasNumber() { |
| return this.number != null; |
| } |
| |
| public void setNumber(Expr number) { |
| this.number = number; |
| } |
| |
| public Expr getNumber() { |
| return number; |
| } |
| |
| @Override |
| public Object clone() throws CloneNotSupportedException { |
| WindowStartBound start = (WindowStartBound) super.clone(); |
| start.boundType = boundType; |
| start.number = (Expr) number.clone(); |
| return start; |
| } |
| } |
| |
| public static class WindowEndBound implements Cloneable { |
| @Expose private WindowFrameEndBoundType boundType; |
| @Expose private Expr number; |
| |
| public WindowEndBound(WindowFrameEndBoundType type) { |
| this.boundType = type; |
| } |
| |
| public WindowFrameEndBoundType getBoundType() { |
| return boundType; |
| } |
| |
| public boolean hasNumber() { |
| return this.number != null; |
| } |
| |
| public void setNumber(Expr number) { |
| this.number = number; |
| } |
| |
| public Expr getNumber() { |
| return number; |
| } |
| |
| @Override |
| public Object clone() throws CloneNotSupportedException { |
| WindowEndBound end = (WindowEndBound) super.clone(); |
| end.boundType = boundType; |
| end.number = (Expr) number.clone(); |
| return end; |
| } |
| } |
| } |