| /* |
| * 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.iotdb.db.mpp.plan.expression.multi; |
| |
| import org.apache.iotdb.commons.conf.IoTDBConstant; |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.commons.udf.builtin.BuiltinAggregationFunction; |
| import org.apache.iotdb.db.exception.query.LogicalOptimizeException; |
| import org.apache.iotdb.db.exception.query.QueryProcessException; |
| import org.apache.iotdb.db.exception.sql.SemanticException; |
| import org.apache.iotdb.db.mpp.plan.analyze.TypeProvider; |
| import org.apache.iotdb.db.mpp.plan.expression.Expression; |
| import org.apache.iotdb.db.mpp.plan.expression.ExpressionType; |
| import org.apache.iotdb.db.mpp.plan.expression.leaf.TimeSeriesOperand; |
| import org.apache.iotdb.db.mpp.plan.expression.visitor.ExpressionVisitor; |
| import org.apache.iotdb.db.mpp.plan.planner.plan.parameter.InputLocation; |
| import org.apache.iotdb.db.mpp.transformation.dag.input.QueryDataSetInputLayer; |
| import org.apache.iotdb.db.mpp.transformation.dag.intermediate.IntermediateLayer; |
| import org.apache.iotdb.db.mpp.transformation.dag.intermediate.MultiInputColumnIntermediateLayer; |
| import org.apache.iotdb.db.mpp.transformation.dag.intermediate.SingleInputColumnMultiReferenceIntermediateLayer; |
| import org.apache.iotdb.db.mpp.transformation.dag.intermediate.SingleInputColumnSingleReferenceIntermediateLayer; |
| import org.apache.iotdb.db.mpp.transformation.dag.memory.LayerMemoryAssigner; |
| import org.apache.iotdb.db.mpp.transformation.dag.transformer.Transformer; |
| import org.apache.iotdb.db.mpp.transformation.dag.transformer.multi.MappableUDFQueryRowTransformer; |
| import org.apache.iotdb.db.mpp.transformation.dag.transformer.multi.UDFQueryRowTransformer; |
| import org.apache.iotdb.db.mpp.transformation.dag.transformer.multi.UDFQueryRowWindowTransformer; |
| import org.apache.iotdb.db.mpp.transformation.dag.transformer.multi.UDFQueryTransformer; |
| import org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.TransparentTransformer; |
| import org.apache.iotdb.db.mpp.transformation.dag.udf.UDTFContext; |
| import org.apache.iotdb.db.mpp.transformation.dag.udf.UDTFExecutor; |
| import org.apache.iotdb.db.mpp.transformation.dag.udf.UDTFInformationInferrer; |
| import org.apache.iotdb.db.qp.physical.crud.UDTFPlan; |
| import org.apache.iotdb.db.qp.strategy.optimizer.ConcatPathOptimizer; |
| import org.apache.iotdb.db.utils.TypeInferenceUtils; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| import org.apache.iotdb.udf.api.customizer.strategy.AccessStrategy; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.time.ZoneId; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| public class FunctionExpression extends Expression { |
| |
| /** |
| * true: aggregation function<br> |
| * false: time series generating function |
| */ |
| private final boolean isBuiltInAggregationFunctionExpression; |
| |
| private boolean isUserDefinedAggregationFunctionExpression; |
| |
| private final String functionName; |
| private final Map<String, String> functionAttributes; |
| |
| /** |
| * example: select udf(a, b, udf(c)) from root.sg.d; |
| * |
| * <p>3 expressions [root.sg.d.a, root.sg.d.b, udf(root.sg.d.c)] will be in this field. |
| */ |
| private List<Expression> expressions; |
| |
| private List<PartialPath> paths; |
| |
| private String parametersString; |
| |
| public FunctionExpression(String functionName) { |
| this.functionName = functionName; |
| functionAttributes = new LinkedHashMap<>(); |
| expressions = new ArrayList<>(); |
| |
| isBuiltInAggregationFunctionExpression = |
| BuiltinAggregationFunction.getNativeFunctionNames().contains(functionName.toLowerCase()); |
| isConstantOperandCache = true; |
| } |
| |
| public FunctionExpression( |
| String functionName, Map<String, String> functionAttributes, List<Expression> expressions) { |
| this.functionName = functionName; |
| this.functionAttributes = functionAttributes; |
| this.expressions = expressions; |
| |
| isBuiltInAggregationFunctionExpression = |
| BuiltinAggregationFunction.getNativeFunctionNames().contains(functionName.toLowerCase()); |
| isConstantOperandCache = expressions.stream().anyMatch(Expression::isConstantOperand); |
| isUserDefinedAggregationFunctionExpression = |
| expressions.stream() |
| .anyMatch( |
| v -> |
| v.isUserDefinedAggregationFunctionExpression() |
| || v.isBuiltInAggregationFunctionExpression()); |
| } |
| |
| public FunctionExpression(ByteBuffer byteBuffer) { |
| functionName = ReadWriteIOUtils.readString(byteBuffer); |
| |
| Map<String, String> deserializedFunctionAttributes = ReadWriteIOUtils.readMap(byteBuffer); |
| functionAttributes = |
| deserializedFunctionAttributes != null |
| ? deserializedFunctionAttributes |
| : new LinkedHashMap<>(); |
| |
| int expressionSize = ReadWriteIOUtils.readInt(byteBuffer); |
| expressions = new ArrayList<>(); |
| for (int i = 0; i < expressionSize; i++) { |
| expressions.add(Expression.deserialize(byteBuffer)); |
| } |
| |
| isBuiltInAggregationFunctionExpression = |
| BuiltinAggregationFunction.getNativeFunctionNames().contains(functionName); |
| isConstantOperandCache = expressions.stream().anyMatch(Expression::isConstantOperand); |
| isUserDefinedAggregationFunctionExpression = |
| expressions.stream() |
| .anyMatch( |
| v -> |
| v.isUserDefinedAggregationFunctionExpression() |
| || v.isBuiltInAggregationFunctionExpression()); |
| } |
| |
| @Override |
| public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) { |
| return visitor.visitFunctionExpression(this, context); |
| } |
| |
| @Override |
| public boolean isBuiltInAggregationFunctionExpression() { |
| return isBuiltInAggregationFunctionExpression; |
| } |
| |
| @Override |
| public boolean isConstantOperandInternal() { |
| return isConstantOperandCache; |
| } |
| |
| @Override |
| public boolean isTimeSeriesGeneratingFunctionExpression() { |
| return !isBuiltInAggregationFunctionExpression() |
| && !isUserDefinedAggregationFunctionExpression(); |
| } |
| |
| @Override |
| public boolean isUserDefinedAggregationFunctionExpression() { |
| return isUserDefinedAggregationFunctionExpression; |
| } |
| |
| public boolean isCountStar() { |
| return getPaths().size() == 1 |
| && (paths.get(0).getTailNode().equals(IoTDBConstant.ONE_LEVEL_PATH_WILDCARD) |
| || paths.get(0).getTailNode().equals(IoTDBConstant.MULTI_LEVEL_PATH_WILDCARD)) |
| && functionName.equals(IoTDBConstant.COLUMN_COUNT); |
| } |
| |
| public void addAttribute(String key, String value) { |
| functionAttributes.put(key, value); |
| } |
| |
| public void addExpression(Expression expression) { |
| isConstantOperandCache = isConstantOperandCache && expression.isConstantOperand(); |
| isUserDefinedAggregationFunctionExpression = |
| isUserDefinedAggregationFunctionExpression |
| || expression.isUserDefinedAggregationFunctionExpression() |
| || expression.isBuiltInAggregationFunctionExpression(); |
| expressions.add(expression); |
| } |
| |
| public void setExpressions(List<Expression> expressions) { |
| this.expressions = expressions; |
| } |
| |
| public String getFunctionName() { |
| return functionName; |
| } |
| |
| public Map<String, String> getFunctionAttributes() { |
| return functionAttributes; |
| } |
| |
| @Override |
| public List<Expression> getExpressions() { |
| return expressions; |
| } |
| |
| @Override |
| public void concat(List<PartialPath> prefixPaths, List<Expression> resultExpressions) { |
| List<List<Expression>> resultExpressionsForRecursionList = new ArrayList<>(); |
| |
| for (Expression suffixExpression : expressions) { |
| List<Expression> resultExpressionsForRecursion = new ArrayList<>(); |
| suffixExpression.concat(prefixPaths, resultExpressionsForRecursion); |
| resultExpressionsForRecursionList.add(resultExpressionsForRecursion); |
| } |
| |
| List<List<Expression>> functionExpressions = new ArrayList<>(); |
| ConcatPathOptimizer.cartesianProduct( |
| resultExpressionsForRecursionList, functionExpressions, 0, new ArrayList<>()); |
| for (List<Expression> functionExpression : functionExpressions) { |
| resultExpressions.add( |
| new FunctionExpression(functionName, functionAttributes, functionExpression)); |
| } |
| } |
| |
| @Override |
| public void removeWildcards( |
| org.apache.iotdb.db.qp.utils.WildcardsRemover wildcardsRemover, |
| List<Expression> resultExpressions) |
| throws LogicalOptimizeException { |
| for (List<Expression> functionExpression : wildcardsRemover.removeWildcardsFrom(expressions)) { |
| resultExpressions.add( |
| new FunctionExpression(functionName, functionAttributes, functionExpression)); |
| } |
| } |
| |
| @Override |
| public void collectPaths(Set<PartialPath> pathSet) { |
| for (Expression expression : expressions) { |
| expression.collectPaths(pathSet); |
| } |
| } |
| |
| @Override |
| public void constructUdfExecutors( |
| Map<String, UDTFExecutor> expressionName2Executor, ZoneId zoneId) { |
| String expressionString = getExpressionString(); |
| if (expressionName2Executor.containsKey(expressionString)) { |
| return; |
| } |
| |
| for (Expression expression : expressions) { |
| expression.constructUdfExecutors(expressionName2Executor, zoneId); |
| } |
| expressionName2Executor.put(expressionString, new UDTFExecutor(functionName, zoneId)); |
| } |
| |
| @Override |
| public TSDataType inferTypes(TypeProvider typeProvider) { |
| final String expressionString = toString(); |
| |
| if (!typeProvider.containsTypeInfoOf(expressionString)) { |
| for (Expression expression : expressions) { |
| expression.inferTypes(typeProvider); |
| } |
| |
| if (!isBuiltInAggregationFunctionExpression()) { |
| typeProvider.setType( |
| expressionString, |
| new UDTFInformationInferrer(functionName) |
| .inferOutputType( |
| expressions.stream().map(Expression::toString).collect(Collectors.toList()), |
| expressions.stream() |
| .map(f -> typeProvider.getType(f.toString())) |
| .collect(Collectors.toList()), |
| functionAttributes)); |
| } else { |
| if (expressions.size() != 1) { |
| throw new SemanticException( |
| String.format( |
| "Builtin aggregation function only accepts 1 input expression. Actual %d input expressions.", |
| expressions.size())); |
| } |
| typeProvider.setType( |
| expressionString, |
| TypeInferenceUtils.getAggrDataType( |
| functionName, typeProvider.getType(expressions.get(0).toString()))); |
| } |
| } |
| |
| return typeProvider.getType(expressionString); |
| } |
| |
| @Override |
| public void bindInputLayerColumnIndexWithExpression(UDTFPlan udtfPlan) { |
| for (Expression expression : expressions) { |
| expression.bindInputLayerColumnIndexWithExpression(udtfPlan); |
| } |
| inputColumnIndex = udtfPlan.getReaderIndexByExpressionName(toString()); |
| } |
| |
| @Override |
| public void bindInputLayerColumnIndexWithExpression( |
| Map<String, List<InputLocation>> inputLocations) { |
| for (Expression expression : expressions) { |
| expression.bindInputLayerColumnIndexWithExpression(inputLocations); |
| } |
| |
| final String digest = toString(); |
| if (inputLocations.containsKey(digest)) { |
| inputColumnIndex = inputLocations.get(digest).get(0).getValueColumnIndex(); |
| } |
| } |
| |
| @Override |
| public void updateStatisticsForMemoryAssigner(LayerMemoryAssigner memoryAssigner) { |
| for (Expression expression : expressions) { |
| expression.updateStatisticsForMemoryAssigner(memoryAssigner); |
| } |
| memoryAssigner.increaseExpressionReference(this); |
| } |
| |
| @Override |
| public IntermediateLayer constructIntermediateLayer( |
| long queryId, |
| UDTFContext udtfContext, |
| QueryDataSetInputLayer rawTimeSeriesInputLayer, |
| Map<Expression, IntermediateLayer> expressionIntermediateLayerMap, |
| TypeProvider typeProvider, |
| LayerMemoryAssigner memoryAssigner) |
| throws QueryProcessException, IOException { |
| if (!expressionIntermediateLayerMap.containsKey(this)) { |
| float memoryBudgetInMB = memoryAssigner.assign(); |
| Transformer transformer; |
| if (isBuiltInAggregationFunctionExpression) { |
| transformer = |
| new TransparentTransformer( |
| rawTimeSeriesInputLayer.constructValuePointReader(inputColumnIndex)); |
| } else { |
| IntermediateLayer udfInputIntermediateLayer = |
| constructUdfInputIntermediateLayer( |
| queryId, |
| udtfContext, |
| rawTimeSeriesInputLayer, |
| expressionIntermediateLayerMap, |
| typeProvider, |
| memoryAssigner); |
| transformer = |
| constructUdfTransformer( |
| queryId, udtfContext, typeProvider, memoryAssigner, udfInputIntermediateLayer); |
| } |
| expressionIntermediateLayerMap.put( |
| this, |
| memoryAssigner.getReference(this) == 1 |
| ? new SingleInputColumnSingleReferenceIntermediateLayer( |
| this, queryId, memoryBudgetInMB, transformer) |
| : new SingleInputColumnMultiReferenceIntermediateLayer( |
| this, queryId, memoryBudgetInMB, transformer)); |
| } |
| |
| return expressionIntermediateLayerMap.get(this); |
| } |
| |
| private IntermediateLayer constructUdfInputIntermediateLayer( |
| long queryId, |
| UDTFContext udtfContext, |
| QueryDataSetInputLayer rawTimeSeriesInputLayer, |
| Map<Expression, IntermediateLayer> expressionIntermediateLayerMap, |
| TypeProvider typeProvider, |
| LayerMemoryAssigner memoryAssigner) |
| throws QueryProcessException, IOException { |
| List<IntermediateLayer> intermediateLayers = new ArrayList<>(); |
| for (Expression expression : expressions) { |
| intermediateLayers.add( |
| expression.constructIntermediateLayer( |
| queryId, |
| udtfContext, |
| rawTimeSeriesInputLayer, |
| expressionIntermediateLayerMap, |
| typeProvider, |
| memoryAssigner)); |
| } |
| return intermediateLayers.size() == 1 |
| ? intermediateLayers.get(0) |
| : new MultiInputColumnIntermediateLayer( |
| this, |
| queryId, |
| memoryAssigner.assign(), |
| intermediateLayers.stream() |
| .map(IntermediateLayer::constructPointReader) |
| .collect(Collectors.toList())); |
| } |
| |
| private UDFQueryTransformer constructUdfTransformer( |
| long queryId, |
| UDTFContext udtfContext, |
| TypeProvider typeProvider, |
| LayerMemoryAssigner memoryAssigner, |
| IntermediateLayer udfInputIntermediateLayer) |
| throws QueryProcessException, IOException { |
| UDTFExecutor executor = udtfContext.getExecutorByFunctionExpression(this); |
| |
| executor.beforeStart( |
| queryId, |
| memoryAssigner.assign(), |
| expressions.stream().map(Expression::toString).collect(Collectors.toList()), |
| expressions.stream() |
| .map(f -> typeProvider.getType(f.toString())) |
| .collect(Collectors.toList()), |
| functionAttributes); |
| |
| AccessStrategy accessStrategy = executor.getConfigurations().getAccessStrategy(); |
| switch (accessStrategy.getAccessStrategyType()) { |
| case MAPPABLE_ROW_BY_ROW: |
| return new MappableUDFQueryRowTransformer( |
| udfInputIntermediateLayer.constructRowReader(), executor); |
| case ROW_BY_ROW: |
| return new UDFQueryRowTransformer(udfInputIntermediateLayer.constructRowReader(), executor); |
| case SLIDING_SIZE_WINDOW: |
| case SLIDING_TIME_WINDOW: |
| return new UDFQueryRowWindowTransformer( |
| udfInputIntermediateLayer.constructRowWindowReader( |
| accessStrategy, memoryAssigner.assign()), |
| executor); |
| default: |
| throw new UnsupportedOperationException("Unsupported transformer access strategy"); |
| } |
| } |
| |
| @Override |
| public boolean isMappable(TypeProvider typeProvider) { |
| if (isBuiltInAggregationFunctionExpression) { |
| return true; |
| } |
| return new UDTFInformationInferrer(functionName) |
| .getAccessStrategy( |
| expressions.stream().map(Expression::toString).collect(Collectors.toList()), |
| expressions.stream() |
| .map(f -> typeProvider.getType(f.toString())) |
| .collect(Collectors.toList()), |
| functionAttributes) |
| .getAccessStrategyType() |
| .equals(AccessStrategy.AccessStrategyType.MAPPABLE_ROW_BY_ROW); |
| } |
| |
| @Override |
| public IntermediateLayer constructIntermediateLayer( |
| long queryId, |
| UDTFContext udtfContext, |
| QueryDataSetInputLayer rawTimeSeriesInputLayer, |
| Map<Expression, IntermediateLayer> expressionIntermediateLayerMap, |
| Map<Expression, TSDataType> expressionDataTypeMap, |
| LayerMemoryAssigner memoryAssigner) |
| throws QueryProcessException, IOException { |
| if (!expressionIntermediateLayerMap.containsKey(this)) { |
| float memoryBudgetInMB = memoryAssigner.assign(); |
| Transformer transformer; |
| if (isBuiltInAggregationFunctionExpression) { |
| transformer = |
| new TransparentTransformer( |
| rawTimeSeriesInputLayer.constructValuePointReader(inputColumnIndex)); |
| } else { |
| IntermediateLayer udfInputIntermediateLayer = |
| constructUdfInputIntermediateLayer( |
| queryId, |
| udtfContext, |
| rawTimeSeriesInputLayer, |
| expressionIntermediateLayerMap, |
| expressionDataTypeMap, |
| memoryAssigner); |
| transformer = |
| constructUdfTransformer( |
| queryId, |
| udtfContext, |
| expressionDataTypeMap, |
| memoryAssigner, |
| udfInputIntermediateLayer); |
| } |
| expressionDataTypeMap.put(this, transformer.getDataType()); |
| expressionIntermediateLayerMap.put( |
| this, |
| memoryAssigner.getReference(this) == 1 |
| ? new SingleInputColumnSingleReferenceIntermediateLayer( |
| this, queryId, memoryBudgetInMB, transformer) |
| : new SingleInputColumnMultiReferenceIntermediateLayer( |
| this, queryId, memoryBudgetInMB, transformer)); |
| } |
| |
| return expressionIntermediateLayerMap.get(this); |
| } |
| |
| // TODO: remove it after MPP finished |
| @Deprecated |
| private IntermediateLayer constructUdfInputIntermediateLayer( |
| long queryId, |
| UDTFContext udtfContext, |
| QueryDataSetInputLayer rawTimeSeriesInputLayer, |
| Map<Expression, IntermediateLayer> expressionIntermediateLayerMap, |
| Map<Expression, TSDataType> expressionDataTypeMap, |
| LayerMemoryAssigner memoryAssigner) |
| throws QueryProcessException, IOException { |
| List<IntermediateLayer> intermediateLayers = new ArrayList<>(); |
| for (Expression expression : expressions) { |
| intermediateLayers.add( |
| expression.constructIntermediateLayer( |
| queryId, |
| udtfContext, |
| rawTimeSeriesInputLayer, |
| expressionIntermediateLayerMap, |
| expressionDataTypeMap, |
| memoryAssigner)); |
| } |
| return intermediateLayers.size() == 1 |
| ? intermediateLayers.get(0) |
| : new MultiInputColumnIntermediateLayer( |
| this, |
| queryId, |
| memoryAssigner.assign(), |
| intermediateLayers.stream() |
| .map(IntermediateLayer::constructPointReader) |
| .collect(Collectors.toList())); |
| } |
| |
| // TODO: remove it after MPP finished |
| @Deprecated |
| private UDFQueryTransformer constructUdfTransformer( |
| long queryId, |
| UDTFContext udtfContext, |
| Map<Expression, TSDataType> expressionDataTypeMap, |
| LayerMemoryAssigner memoryAssigner, |
| IntermediateLayer udfInputIntermediateLayer) |
| throws QueryProcessException, IOException { |
| UDTFExecutor executor = udtfContext.getExecutorByFunctionExpression(this); |
| |
| executor.beforeStart( |
| queryId, |
| memoryAssigner.assign(), |
| expressions.stream().map(Expression::toString).collect(Collectors.toList()), |
| expressions.stream().map(expressionDataTypeMap::get).collect(Collectors.toList()), |
| functionAttributes); |
| |
| AccessStrategy accessStrategy = executor.getConfigurations().getAccessStrategy(); |
| switch (accessStrategy.getAccessStrategyType()) { |
| case MAPPABLE_ROW_BY_ROW: |
| return new MappableUDFQueryRowTransformer( |
| udfInputIntermediateLayer.constructRowReader(), executor); |
| case ROW_BY_ROW: |
| return new UDFQueryRowTransformer(udfInputIntermediateLayer.constructRowReader(), executor); |
| case SLIDING_SIZE_WINDOW: |
| case SLIDING_TIME_WINDOW: |
| return new UDFQueryRowWindowTransformer( |
| udfInputIntermediateLayer.constructRowWindowReader( |
| accessStrategy, memoryAssigner.assign()), |
| executor); |
| default: |
| throw new UnsupportedOperationException("Unsupported transformer access strategy"); |
| } |
| } |
| |
| public List<PartialPath> getPaths() { |
| if (paths == null) { |
| paths = new ArrayList<>(); |
| for (Expression expression : expressions) { |
| paths.add( |
| expression instanceof TimeSeriesOperand |
| ? ((TimeSeriesOperand) expression).getPath() |
| : null); |
| } |
| } |
| return paths; |
| } |
| |
| @Override |
| public String getExpressionStringInternal() { |
| return functionName + "(" + getParametersString() + ")"; |
| } |
| |
| /** |
| * Generates the parameter part of the function column name. |
| * |
| * <p>Example: |
| * |
| * <p>Full column name -> udf(root.sg.d.s1, sin(root.sg.d.s1), 'key1'='value1', 'key2'='value2') |
| * |
| * <p>The parameter part -> root.sg.d.s1, sin(root.sg.d.s1), 'key1'='value1', 'key2'='value2' |
| */ |
| private String getParametersString() { |
| if (parametersString == null) { |
| StringBuilder builder = new StringBuilder(); |
| if (!expressions.isEmpty()) { |
| builder.append(expressions.get(0).toString()); |
| for (int i = 1; i < expressions.size(); ++i) { |
| builder.append(", ").append(expressions.get(i).toString()); |
| } |
| } |
| if (!functionAttributes.isEmpty()) { |
| if (!expressions.isEmpty()) { |
| builder.append(", "); |
| } |
| Iterator<Entry<String, String>> iterator = functionAttributes.entrySet().iterator(); |
| Entry<String, String> entry = iterator.next(); |
| builder |
| .append("\"") |
| .append(entry.getKey()) |
| .append("\"=\"") |
| .append(entry.getValue()) |
| .append("\""); |
| while (iterator.hasNext()) { |
| entry = iterator.next(); |
| builder |
| .append(", ") |
| .append("\"") |
| .append(entry.getKey()) |
| .append("\"=\"") |
| .append(entry.getValue()) |
| .append("\""); |
| } |
| } |
| parametersString = builder.toString(); |
| } |
| return parametersString; |
| } |
| |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.FUNCTION; |
| } |
| |
| @Override |
| protected void serialize(ByteBuffer byteBuffer) { |
| ReadWriteIOUtils.write(functionName, byteBuffer); |
| ReadWriteIOUtils.write(functionAttributes, byteBuffer); |
| ReadWriteIOUtils.write(expressions.size(), byteBuffer); |
| for (Expression expression : expressions) { |
| Expression.serialize(expression, byteBuffer); |
| } |
| } |
| |
| @Override |
| protected void serialize(DataOutputStream stream) throws IOException { |
| ReadWriteIOUtils.write(functionName, stream); |
| ReadWriteIOUtils.write(functionAttributes, stream); |
| ReadWriteIOUtils.write(expressions.size(), stream); |
| for (Expression expression : expressions) { |
| Expression.serialize(expression, stream); |
| } |
| } |
| } |