org.apache.drill.common.logical.data.WindowFrame.java Source code

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Here is the source code for org.apache.drill.common.logical.data.WindowFrame.java

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/*******************************************************************************
 * 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.drill.common.logical.data;

import org.apache.drill.common.expression.FieldReference;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;

@JsonTypeName("windowframe")
public class WindowFrame extends SingleInputOperator {

    private final FieldReference within;
    private final FrameRef frame;
    private final long start;
    private final long end;

    @JsonCreator
    public WindowFrame(@JsonProperty("within") FieldReference within, @JsonProperty("ref") FrameRef frame,
            @JsonProperty("start") Long start, @JsonProperty("end") Long end) {
        super();
        this.within = within;
        this.frame = frame;
        this.start = start == null ? Long.MIN_VALUE : start;
        this.end = end == null ? Long.MIN_VALUE : end;
    }

    @JsonProperty("ref")
    public FrameRef getFrame() {
        return frame;
    }

    public FieldReference getWithin() {
        return within;
    }

    public long getStart() {
        return start;
    }

    public long getEnd() {
        return end;
    }

    public static class FrameRef {
        private final FieldReference segment;
        private final FieldReference position;

        @JsonCreator
        public FrameRef(@JsonProperty("segment") FieldReference segment,
                @JsonProperty("position") FieldReference position) {
            super();
            this.segment = segment;
            this.position = position;
        }

        public FieldReference getSegment() {
            return segment;
        }

        public FieldReference getPosition() {
            return position;
        }

    }
}