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Java SDK for Milvus, a distributed high-performance vector search engine.
update grpc to 1.42.1
update protobuf to 3.19.1
restore the calcDistance interface that is removed in 2.1.0-beta4
/*
* 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 io.milvus.param.dml;
import com.google.common.collect.Lists;
import io.milvus.common.clientenum.ConsistencyLevelEnum;
import io.milvus.exception.ParamException;
import io.milvus.param.Constant;
import io.milvus.param.MetricType;
import io.milvus.param.ParamUtils;
import lombok.Getter;
import lombok.NonNull;
import java.nio.ByteBuffer;
import java.util.List;
/**
* Parameters for search interface.
*/
@Getter
public class SearchParam {
private final String collectionName;
private final List partitionNames;
private final String metricType;
private final String vectorFieldName;
private final int topK;
private final String expr;
private final List outFields;
private final List vectors;
private final int roundDecimal;
private final String params;
private final long travelTimestamp;
private final ConsistencyLevelEnum consistencyLevel;
private SearchParam(@NonNull Builder builder) {
this.collectionName = builder.collectionName;
this.partitionNames = builder.partitionNames;
this.metricType = builder.metricType.name();
this.vectorFieldName = builder.vectorFieldName;
this.topK = builder.topK;
this.expr = builder.expr;
this.outFields = builder.outFields;
this.vectors = builder.vectors;
this.roundDecimal = builder.roundDecimal;
this.params = builder.params;
this.travelTimestamp = builder.travelTimestamp;
this.consistencyLevel = builder.consistencyLevel;
}
public static Builder newBuilder() {
return new Builder();
}
/**
* Builder for {@link SearchParam} class.
*/
public static class Builder {
private String collectionName;
private final List partitionNames = Lists.newArrayList();
private MetricType metricType = MetricType.L2;
private String vectorFieldName;
private Integer topK;
private String expr = "";
private final List outFields = Lists.newArrayList();
private List vectors;
private Integer roundDecimal = -1;
private String params = "{}";
private Long travelTimestamp = 0L;
private ConsistencyLevelEnum consistencyLevel = ConsistencyLevelEnum.BOUNDED;
Builder() {
}
/**
* Sets the collection name. Collection name cannot be empty or null.
*
* @param collectionName collection name
* @return Builder
*/
public Builder withCollectionName(@NonNull String collectionName) {
this.collectionName = collectionName;
return this;
}
/**
* Sets partition names list to specify search scope (Optional).
*
* @param partitionNames partition names list
* @return Builder
*/
public Builder withPartitionNames(@NonNull List partitionNames) {
partitionNames.forEach(this::addPartitionName);
return this;
}
/**
* ConsistencyLevel of consistency level.
* Default value is ConsistencyLevelEnum.BOUNDED.
*
* @param consistencyLevel consistency level
* @return Builder
*/
public Builder withConsistencyLevel(ConsistencyLevelEnum consistencyLevel) {
this.consistencyLevel = consistencyLevel;
return this;
}
/**
* Adds a partition to specify search scope (Optional).
*
* @param partitionName partition name
* @return Builder
*/
public Builder addPartitionName(@NonNull String partitionName) {
if (!this.partitionNames.contains(partitionName)) {
this.partitionNames.add(partitionName);
}
return this;
}
/**
* Sets metric type of ANN searching.
*
* @param metricType metric type
* @return Builder
*/
public Builder withMetricType(@NonNull MetricType metricType) {
this.metricType = metricType;
return this;
}
/**
* Sets target vector field by name. Field name cannot be empty or null.
*
* @param vectorFieldName vector field name
* @return Builder
*/
public Builder withVectorFieldName(@NonNull String vectorFieldName) {
this.vectorFieldName = vectorFieldName;
return this;
}
/**
* Sets topK value of ANN search.
*
* @param topK topK value
* @return Builder
*/
public Builder withTopK(@NonNull Integer topK) {
this.topK = topK;
return this;
}
/**
* Sets expression to filter out entities before searching (Optional).
* @see Boolean Expression Rules
*
* @param expr filtering expression
* @return Builder
*/
public Builder withExpr(@NonNull String expr) {
this.expr = expr;
return this;
}
/**
* Specifies output fields (Optional).
*
* @param outFields output fields
* @return Builder
*/
public Builder withOutFields(@NonNull List outFields) {
outFields.forEach(this::addOutField);
return this;
}
/**
* Specifies an output field (Optional).
*
* @param fieldName filed name
* @return Builder
*/
public Builder addOutField(@NonNull String fieldName) {
if (!this.outFields.contains(fieldName)) {
this.outFields.add(fieldName);
}
return this;
}
/**
* Sets the target vectors.
*
* @param vectors list of target vectors:
* if vector type is FloatVector, vectors is List of List Float;
* if vector type is BinaryVector, vectors is List of ByteBuffer;
* @return Builder
*/
public Builder withVectors(@NonNull List vectors) {
this.vectors = vectors;
return this;
}
/**
* Specifies the decimal place of the returned results.
*
* @param decimal how many digits after the decimal point
* @return Builder
*/
public Builder withRoundDecimal(@NonNull Integer decimal) {
this.roundDecimal = decimal;
return this;
}
/**
* Sets the search parameters specific to the index type.
*
* For example: IVF index, the search parameters can be "{\"nprobe\":10}"
* For more information: @see Index Selection
*
* @param params extra parameters in json format
* @return Builder
*/
public Builder withParams(@NonNull String params) {
this.params = params;
return this;
}
/**
* Specify an absolute timestamp in a search to get results based on a data view at a specified point in time.
* Default value is 0, server executes search on a full data view.
*
* @param ts a timestamp value
* @return Builder
*/
public Builder withTravelTimestamp(@NonNull Long ts) {
this.travelTimestamp = ts;
return this;
}
/**
* Verifies parameters and creates a new {@link SearchParam} instance.
*
* @return {@link SearchParam}
*/
public SearchParam build() throws ParamException {
ParamUtils.CheckNullEmptyString(collectionName, "Collection name");
ParamUtils.CheckNullEmptyString(vectorFieldName, "Target field name");
if (topK <= 0) {
throw new ParamException("TopK value is illegal");
}
if (travelTimestamp < 0) {
throw new ParamException("The travel timestamp must be greater than 0");
}
if (metricType == MetricType.INVALID) {
throw new ParamException("Metric type is invalid");
}
if (vectors == null || vectors.isEmpty()) {
throw new ParamException("Target vectors can not be empty");
}
if (vectors.get(0) instanceof List) {
// float vectors
List first = (List) vectors.get(0);
if (!(first.get(0) instanceof Float)) {
throw new ParamException("Float vector field's value must be Lst");
}
int dim = first.size();
for (int i = 1; i < vectors.size(); ++i) {
List temp = (List) vectors.get(i);
if (dim != temp.size()) {
throw new ParamException("Target vector dimension must be equal");
}
}
// check metric type
if (!ParamUtils.IsFloatMetric(metricType)) {
throw new ParamException("Target vector is float but metric type is incorrect");
}
} else if (vectors.get(0) instanceof ByteBuffer) {
// binary vectors
ByteBuffer first = (ByteBuffer) vectors.get(0);
int dim = first.position();
for (int i = 1; i < vectors.size(); ++i) {
ByteBuffer temp = (ByteBuffer) vectors.get(i);
if (dim != temp.position()) {
throw new ParamException("Target vector dimension must be equal");
}
}
// check metric type
if (!ParamUtils.IsBinaryMetric(metricType)) {
throw new ParamException("Target vector is binary but metric type is incorrect");
}
} else {
throw new ParamException("Target vector type must be Lst or ByteBuffer");
}
return new SearchParam(this);
}
}
/**
* Constructs a String by {@link SearchParam} instance.
*
* @return String
*/
@Override
public String toString() {
return "SearchParam{" +
"collectionName='" + collectionName + '\'' +
", partitionNames='" + partitionNames.toString() + '\'' +
", metricType=" + metricType +
", target vectors count=" + vectors.size() +
", vectorFieldName='" + vectorFieldName + '\'' +
", topK=" + topK +
", expr='" + expr + '\'' +
", params='" + params + '\'' +
", consistencyLevel='" + consistencyLevel + '\'' +
'}';
}
}
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