| /* |
| * 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.solr.analytics.function.reduction; |
| |
| import java.util.function.UnaryOperator; |
| |
| import org.apache.solr.analytics.ExpressionFactory.CreatorFunction; |
| import org.apache.solr.analytics.function.ReductionFunction; |
| import org.apache.solr.analytics.function.reduction.data.MaxCollector.DoubleMaxCollector; |
| import org.apache.solr.analytics.function.reduction.data.MaxCollector.FloatMaxCollector; |
| import org.apache.solr.analytics.function.reduction.data.MaxCollector.IntMaxCollector; |
| import org.apache.solr.analytics.function.reduction.data.MaxCollector.LongMaxCollector; |
| import org.apache.solr.analytics.function.reduction.data.MaxCollector.StringMaxCollector; |
| import org.apache.solr.analytics.value.AnalyticsValueStream; |
| import org.apache.solr.analytics.value.DateValueStream; |
| import org.apache.solr.analytics.value.DoubleValueStream; |
| import org.apache.solr.analytics.value.FloatValueStream; |
| import org.apache.solr.analytics.value.IntValueStream; |
| import org.apache.solr.analytics.value.LongValueStream; |
| import org.apache.solr.analytics.value.StringValueStream; |
| import org.apache.solr.analytics.value.DateValue.AbstractDateValue; |
| import org.apache.solr.analytics.value.DoubleValue.AbstractDoubleValue; |
| import org.apache.solr.analytics.value.FloatValue.AbstractFloatValue; |
| import org.apache.solr.analytics.value.IntValue.AbstractIntValue; |
| import org.apache.solr.analytics.value.LongValue.AbstractLongValue; |
| import org.apache.solr.analytics.value.StringValue.AbstractStringValue; |
| import org.apache.solr.analytics.function.reduction.data.ReductionDataCollector; |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.common.SolrException.ErrorCode; |
| |
| /** |
| * A reduction function which returns the maximum value of the given expression. |
| */ |
| public class MaxFunction { |
| public static final String name = "max"; |
| public static final CreatorFunction creatorFunction = (params -> { |
| if (params.length != 1) { |
| throw new SolrException(ErrorCode.BAD_REQUEST,"The "+name+" function requires 1 paramater, " + params.length + " found."); |
| } |
| AnalyticsValueStream param = params[0]; |
| if (param instanceof DateValueStream) { |
| return new DateMaxFunction((DateValueStream)param); |
| } |
| if (param instanceof IntValueStream) { |
| return new IntMaxFunction((IntValueStream)param); |
| } |
| if (param instanceof LongValueStream) { |
| return new LongMaxFunction((LongValueStream)param); |
| } |
| if (param instanceof FloatValueStream) { |
| return new FloatMaxFunction((FloatValueStream)param); |
| } |
| if (param instanceof DoubleValueStream) { |
| return new DoubleMaxFunction((DoubleValueStream)param); |
| } |
| if (param instanceof StringValueStream) { |
| return new StringMaxFunction((StringValueStream)param); |
| } |
| throw new SolrException(ErrorCode.BAD_REQUEST,"The "+name+" function requires a comparable parameter. " + |
| "Incorrect parameter: "+params[0].getExpressionStr()); |
| }); |
| } |
| class IntMaxFunction extends AbstractIntValue implements ReductionFunction { |
| private IntMaxCollector collector; |
| public static final String name = MaxFunction.name; |
| private final String exprStr; |
| |
| public IntMaxFunction(IntValueStream param) { |
| this.collector = new IntMaxCollector(param); |
| this.exprStr = AnalyticsValueStream.createExpressionString(name,param); |
| } |
| |
| @Override |
| public int getInt() { |
| return collector.exists() ? collector.max() : 0; |
| } |
| @Override |
| public boolean exists() { |
| return collector.exists(); |
| } |
| |
| @Override |
| public void synchronizeDataCollectors(UnaryOperator<ReductionDataCollector<?>> sync) { |
| collector = (IntMaxCollector)sync.apply(collector); |
| } |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| @Override |
| public String getExpressionStr() { |
| return exprStr; |
| } |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.REDUCTION; |
| } |
| } |
| class LongMaxFunction extends AbstractLongValue implements ReductionFunction { |
| private LongMaxCollector collector; |
| public static final String name = MaxFunction.name; |
| private final String exprStr; |
| |
| public LongMaxFunction(LongValueStream param) { |
| this.collector = new LongMaxCollector(param); |
| this.exprStr = AnalyticsValueStream.createExpressionString(name,param); |
| } |
| |
| @Override |
| public long getLong() { |
| return collector.exists() ? collector.max() : 0; |
| } |
| @Override |
| public boolean exists() { |
| return collector.exists(); |
| } |
| |
| @Override |
| public void synchronizeDataCollectors(UnaryOperator<ReductionDataCollector<?>> sync) { |
| collector = (LongMaxCollector)sync.apply(collector); |
| } |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| @Override |
| public String getExpressionStr() { |
| return exprStr; |
| } |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.REDUCTION; |
| } |
| } |
| class FloatMaxFunction extends AbstractFloatValue implements ReductionFunction { |
| private FloatMaxCollector collector; |
| public static final String name = MaxFunction.name; |
| private final String exprStr; |
| |
| public FloatMaxFunction(FloatValueStream param) { |
| this.collector = new FloatMaxCollector(param); |
| this.exprStr = AnalyticsValueStream.createExpressionString(name,param); |
| } |
| |
| @Override |
| public float getFloat() { |
| return collector.exists() ? collector.max() : 0; |
| } |
| @Override |
| public boolean exists() { |
| return collector.exists(); |
| } |
| |
| @Override |
| public void synchronizeDataCollectors(UnaryOperator<ReductionDataCollector<?>> sync) { |
| collector = (FloatMaxCollector)sync.apply(collector); |
| } |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| @Override |
| public String getExpressionStr() { |
| return exprStr; |
| } |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.REDUCTION; |
| } |
| } |
| class DoubleMaxFunction extends AbstractDoubleValue implements ReductionFunction { |
| private DoubleMaxCollector collector; |
| public static final String name = MaxFunction.name; |
| private final String exprStr; |
| |
| public DoubleMaxFunction(DoubleValueStream param) { |
| this.collector = new DoubleMaxCollector(param); |
| this.exprStr = AnalyticsValueStream.createExpressionString(name,param); |
| } |
| |
| @Override |
| public double getDouble() { |
| return collector.exists() ? collector.max() : 0; |
| } |
| @Override |
| public boolean exists() { |
| return collector.exists(); |
| } |
| |
| @Override |
| public void synchronizeDataCollectors(UnaryOperator<ReductionDataCollector<?>> sync) { |
| collector = (DoubleMaxCollector)sync.apply(collector); |
| } |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| @Override |
| public String getExpressionStr() { |
| return exprStr; |
| } |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.REDUCTION; |
| } |
| } |
| class DateMaxFunction extends AbstractDateValue implements ReductionFunction { |
| private LongMaxCollector collector; |
| public static final String name = MaxFunction.name; |
| private final String exprStr; |
| |
| public DateMaxFunction(LongValueStream param) { |
| this.collector = new LongMaxCollector(param); |
| this.exprStr = AnalyticsValueStream.createExpressionString(name,param); |
| } |
| |
| @Override |
| public long getLong() { |
| return collector.exists() ? collector.max() : 0; |
| } |
| @Override |
| public boolean exists() { |
| return collector.exists(); |
| } |
| |
| @Override |
| public void synchronizeDataCollectors(UnaryOperator<ReductionDataCollector<?>> sync) { |
| collector = (LongMaxCollector)sync.apply(collector); |
| } |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| @Override |
| public String getExpressionStr() { |
| return exprStr; |
| } |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.REDUCTION; |
| } |
| } |
| class StringMaxFunction extends AbstractStringValue implements ReductionFunction { |
| private StringMaxCollector collector; |
| public static final String name = MaxFunction.name; |
| private final String exprStr; |
| |
| public StringMaxFunction(StringValueStream param) { |
| this.collector = new StringMaxCollector(param); |
| this.exprStr = AnalyticsValueStream.createExpressionString(name,param); |
| } |
| |
| @Override |
| public String getString() { |
| return collector.exists() ? collector.max() : null; |
| } |
| @Override |
| public boolean exists() { |
| return collector.exists(); |
| } |
| |
| @Override |
| public void synchronizeDataCollectors(UnaryOperator<ReductionDataCollector<?>> sync) { |
| collector = (StringMaxCollector)sync.apply(collector); |
| } |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| @Override |
| public String getExpressionStr() { |
| return exprStr; |
| } |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.REDUCTION; |
| } |
| } |