Refactor FieldSortBuilder
* adds json parsing, * refactors json serialisation, * adds writable parsing and serialisation, * adds json and writable roundtrip test
This commit is contained in:
Isabel Drost-Fromm
parent
0ed0fea558
commit
5bff6e4218
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@ -67,7 +67,6 @@ public final class Fuzziness implements ToXContent, Writeable<Fuzziness> {
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/**
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* Creates a {@link Fuzziness} instance from an edit distance. The value must be one of <tt>[0, 1, 2]</tt>
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*
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* Note: Using this method only makes sense if the field you are applying Fuzziness to is some sort of string.
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*/
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public static Fuzziness fromEdits(int edits) {
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@ -19,16 +19,36 @@
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package org.elasticsearch.search.sort;
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import org.apache.lucene.util.BytesRef;
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import org.elasticsearch.common.ParseField;
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import org.elasticsearch.common.ParsingException;
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import org.elasticsearch.common.io.stream.NamedWriteable;
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import org.elasticsearch.common.io.stream.StreamInput;
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import org.elasticsearch.common.io.stream.StreamOutput;
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import org.elasticsearch.common.lucene.BytesRefs;
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import org.elasticsearch.common.xcontent.ToXContent;
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import org.elasticsearch.common.xcontent.XContentBuilder;
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import org.elasticsearch.common.xcontent.XContentParser;
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import org.elasticsearch.index.query.QueryBuilder;
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import org.elasticsearch.index.query.QueryParseContext;
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import java.io.IOException;
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import java.util.Objects;
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/**
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* A sort builder to sort based on a document field.
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*/
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public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
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static final FieldSortBuilder PROTOTYPE = new FieldSortBuilder("");
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public static final String NAME = "field_sort";
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public static final ParseField NESTED_PATH = new ParseField("nested_path");
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public static final ParseField NESTED_FILTER = new ParseField("nested_filter");
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public static final ParseField MISSING = new ParseField("missing");
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public static final ParseField ORDER = new ParseField("order");
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public static final ParseField SORT_MODE = new ParseField("mode");
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public static final ParseField UNMAPPED_TYPE = new ParseField("unmapped_type");
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private final String fieldName;
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private Object missing;
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@ -41,6 +61,16 @@ public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
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private String nestedPath;
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/** Copy constructor. */
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public FieldSortBuilder(FieldSortBuilder template) {
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this(template.fieldName);
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this.order(template.order());
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this.missing(template.missing());
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this.unmappedType(template.unmappedType());
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this.sortMode(template.sortMode());
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this.setNestedFilter(template.getNestedFilter());
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this.setNestedPath(template.getNestedPath());
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}
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/**
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* Constructs a new sort based on a document field.
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*
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@ -52,16 +82,30 @@ public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
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}
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this.fieldName = fieldName;
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}
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/** Returns the document field this sort should be based on. */
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public String getFieldName() {
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return this.fieldName;
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}
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/**
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* Sets the value when a field is missing in a doc. Can also be set to <tt>_last</tt> or
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* <tt>_first</tt> to sort missing last or first respectively.
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*/
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public FieldSortBuilder missing(Object missing) {
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this.missing = missing;
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if (missing instanceof String) {
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this.missing = BytesRefs.toBytesRef(missing);
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} else {
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this.missing = missing;
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}
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return this;
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}
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/** Returns the value used when a field is missing in a doc. */
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public Object missing() {
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return this.missing;
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}
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/**
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* Set the type to use in case the current field is not mapped in an index.
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* Specifying a type tells Elasticsearch what type the sort values should have, which is important
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@ -74,9 +118,16 @@ public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
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return this;
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}
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/** Returns the type to use in case the current field is not mapped in an index. */
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public String unmappedType() {
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return this.unmappedType;
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}
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/**
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* Defines what values to pick in the case a document contains multiple values for the targeted sort field.
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* Possible values: min, max, sum and avg
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*
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* TODO would love to see an enum here
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* <p>
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* The last two values are only applicable for number based fields.
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*/
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@ -85,15 +136,26 @@ public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
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return this;
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}
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/** Returns what values to pick in the case a document contains multiple values for the targeted sort field. */
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public String sortMode() {
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return this.sortMode;
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}
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/**
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* Sets the nested filter that the nested objects should match with in order to be taken into account
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* for sorting.
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*
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* TODO should the above getters and setters be deprecated/ changed in favour of real getters and setters?
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*/
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public FieldSortBuilder setNestedFilter(QueryBuilder nestedFilter) {
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this.nestedFilter = nestedFilter;
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return this;
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}
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/** Returns the nested filter that the nested objects should match with in order to be taken into account
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* for sorting. */
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public QueryBuilder getNestedFilter() {
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return this.nestedFilter;
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}
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/**
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* Sets the nested path if sorting occurs on a field that is inside a nested object. By default when sorting on a
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@ -104,26 +166,181 @@ public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
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return this;
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}
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/** Returns the nested path if sorting occurs in a field that is inside a nested object. */
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public String getNestedPath() {
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return this.nestedPath;
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}
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@Override
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public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
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builder.startObject(fieldName);
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builder.field(ORDER_FIELD.getPreferredName(), order);
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if (missing != null) {
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builder.field("missing", missing);
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if (missing instanceof BytesRef) {
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builder.field(MISSING.getPreferredName(), ((BytesRef) missing).utf8ToString());
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} else {
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builder.field(MISSING.getPreferredName(), missing);
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}
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}
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if (unmappedType != null) {
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builder.field(SortParseElement.UNMAPPED_TYPE.getPreferredName(), unmappedType);
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builder.field(UNMAPPED_TYPE.getPreferredName(), unmappedType);
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}
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if (sortMode != null) {
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builder.field("mode", sortMode);
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builder.field(SORT_MODE.getPreferredName(), sortMode);
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}
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if (nestedFilter != null) {
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builder.field("nested_filter", nestedFilter, params);
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builder.field(NESTED_FILTER.getPreferredName(), nestedFilter, params);
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}
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if (nestedPath != null) {
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builder.field("nested_path", nestedPath);
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builder.field(NESTED_PATH.getPreferredName(), nestedPath);
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}
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builder.endObject();
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return builder;
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}
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@Override
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public boolean equals(Object other) {
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if (! (other instanceof FieldSortBuilder)) {
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return false;
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}
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FieldSortBuilder builder = (FieldSortBuilder) other;
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return (Objects.equals(this.fieldName, builder.fieldName) &&
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Objects.equals(this.nestedFilter, builder.nestedFilter) &&
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Objects.equals(this.nestedPath, builder.nestedPath) &&
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Objects.equals(this.missing, builder.missing) &&
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Objects.equals(this.order, builder.order) &&
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Objects.equals(this.sortMode, builder.sortMode) &&
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Objects.equals(this.unmappedType, builder.unmappedType));
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}
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@Override
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public int hashCode() {
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return Objects.hash(this.fieldName, this.nestedFilter, this.nestedPath,
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this.missing, this.order, this.sortMode, this.unmappedType);
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}
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@Override
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public String getWriteableName() {
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return NAME;
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}
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@Override
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public void writeTo(StreamOutput out) throws IOException {
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out.writeString(this.fieldName);
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if (this.nestedFilter != null) {
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out.writeBoolean(true);
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out.writeQuery(this.nestedFilter);
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} else {
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out.writeBoolean(false);
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}
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out.writeOptionalString(this.nestedPath);
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if (this.missing != null) {
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out.writeBoolean(true);
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out.writeGenericValue(this.missing);
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} else {
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out.writeBoolean(false);
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}
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if (this.order != null) {
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out.writeBoolean(true);
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this.order.writeTo(out);
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} else {
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out.writeBoolean(false);
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}
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out.writeOptionalString(this.sortMode);
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out.writeOptionalString(this.unmappedType);
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}
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@Override
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public FieldSortBuilder readFrom(StreamInput in) throws IOException {
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String fieldName = in.readString();
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FieldSortBuilder result = new FieldSortBuilder(fieldName);
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if (in.readBoolean()) {
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QueryBuilder query = in.readQuery();
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result.setNestedFilter(query);
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}
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result.setNestedPath(in.readOptionalString());
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if (in.readBoolean()) {
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result.missing(in.readGenericValue());
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}
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if (in.readBoolean()) {
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result.order(SortOrder.readOrderFrom(in));
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}
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result.sortMode(in.readOptionalString());
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result.unmappedType(in.readOptionalString());
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return result;
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}
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@Override
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public FieldSortBuilder fromXContent(QueryParseContext context, String elementName) throws IOException {
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XContentParser parser = context.parser();
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String fieldName = null;
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QueryBuilder nestedFilter = null;
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String nestedPath = null;
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Object missing = null;
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SortOrder order = null;
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String sortMode = null;
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String unmappedType = null;
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String currentFieldName = null;
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XContentParser.Token token;
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fieldName = elementName;
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while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
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if (token == XContentParser.Token.FIELD_NAME) {
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currentFieldName = parser.currentName();
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while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
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if (token == XContentParser.Token.FIELD_NAME) {
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currentFieldName = parser.currentName();
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} else if (token == XContentParser.Token.START_OBJECT) {
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if (context.parseFieldMatcher().match(currentFieldName, NESTED_FILTER)) {
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nestedFilter = context.parseInnerQueryBuilder();
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}
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} else if (token.isValue()) {
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if (context.parseFieldMatcher().match(currentFieldName, NESTED_PATH)) {
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nestedPath = parser.text();
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} else if (context.parseFieldMatcher().match(currentFieldName, MISSING)) {
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missing = parser.objectBytes();
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} else if (context.parseFieldMatcher().match(currentFieldName, ORDER)) {
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String sortOrder = parser.text();
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if ("asc".equals(sortOrder)) {
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order = SortOrder.ASC;
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} else if ("desc".equals(sortOrder)) {
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order = SortOrder.DESC;
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} else {
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throw new IllegalStateException("Sort order " + sortOrder + " not supported.");
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}
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} else if (context.parseFieldMatcher().match(currentFieldName, SORT_MODE)) {
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sortMode = parser.text();
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} else if (context.parseFieldMatcher().match(currentFieldName, UNMAPPED_TYPE)) {
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unmappedType = parser.text();
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}
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}
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}
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}
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}
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FieldSortBuilder builder = new FieldSortBuilder(fieldName);
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if (nestedFilter != null) {
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builder.setNestedFilter(nestedFilter);
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}
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if (nestedPath != null) {
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builder.setNestedPath(nestedPath);
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}
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if (missing != null) {
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builder.missing(missing);
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}
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if (order != null) {
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builder.order(order);
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}
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if (sortMode != null) {
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builder.sortMode(sortMode);
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}
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if (unmappedType != null) {
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builder.unmappedType(unmappedType);
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}
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return builder;
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}
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}
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@ -0,0 +1,39 @@
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/*
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* Licensed to Elasticsearch under one or more contributor
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* license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright
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* ownership. Elasticsearch licenses this file to you under
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* the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.search.sort;
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import org.elasticsearch.common.xcontent.ToXContent;
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import org.elasticsearch.index.query.QueryParseContext;
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import java.io.IOException;
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public interface ParameterParser<T extends ToXContent> {
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/**
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* Creates a new item from the json held by the {@link ParameterParser}
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* in {@link org.elasticsearch.common.xcontent.XContent} format
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*
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* @param context
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* the input parse context. The state on the parser contained in
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* this context will be changed as a side effect of this method
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* call
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* @return the new item
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*/
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T fromXContent(QueryParseContext context, String elementName) throws IOException;
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}
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@ -0,0 +1,162 @@
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/*
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* Licensed to Elasticsearch under one or more contributor
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* license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright
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* ownership. Elasticsearch licenses this file to you under
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* the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.search.sort;
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import org.elasticsearch.common.io.stream.BytesStreamOutput;
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import org.elasticsearch.common.io.stream.NamedWriteable;
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import org.elasticsearch.common.io.stream.NamedWriteableAwareStreamInput;
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import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
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import org.elasticsearch.common.io.stream.StreamInput;
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import org.elasticsearch.common.settings.Settings;
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import org.elasticsearch.common.xcontent.ToXContent;
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import org.elasticsearch.common.xcontent.XContentBuilder;
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import org.elasticsearch.common.xcontent.XContentFactory;
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import org.elasticsearch.common.xcontent.XContentHelper;
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import org.elasticsearch.common.xcontent.XContentParser;
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import org.elasticsearch.common.xcontent.XContentType;
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import org.elasticsearch.index.query.QueryParseContext;
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import org.elasticsearch.indices.query.IndicesQueriesRegistry;
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import org.elasticsearch.search.SearchModule;
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import org.elasticsearch.test.ESTestCase;
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import org.junit.AfterClass;
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import org.junit.BeforeClass;
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import java.io.IOException;
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import static org.hamcrest.Matchers.*;
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//TODO maybe merge with AbstractsortBuilderTestCase once #14933 is in?
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public abstract class AbstractSearchSourceItemTestCase<T extends NamedWriteable<T> & ToXContent & ParameterParser<T>> extends ESTestCase {
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protected static NamedWriteableRegistry namedWriteableRegistry;
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private static final int NUMBER_OF_TESTBUILDERS = 20;
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static IndicesQueriesRegistry indicesQueriesRegistry;
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@BeforeClass
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public static void init() {
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namedWriteableRegistry = new NamedWriteableRegistry();
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namedWriteableRegistry.registerPrototype(FieldSortBuilder.class, FieldSortBuilder.PROTOTYPE);
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indicesQueriesRegistry = new SearchModule(Settings.EMPTY, namedWriteableRegistry).buildQueryParserRegistry();
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}
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@AfterClass
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public static void afterClass() throws Exception {
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namedWriteableRegistry = null;
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}
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/** Returns random sort that is put under test */
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protected abstract T createTestItem();
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/** Returns mutated version of original so the returned sort is different in terms of equals/hashcode */
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protected abstract T mutate(T original) throws IOException;
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/**
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* Test that creates new sort from a random test sort and checks both for equality
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*/
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public void testFromXContent() throws IOException {
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for (int runs = 0; runs < NUMBER_OF_TESTBUILDERS; runs++) {
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T testItem = createTestItem();
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XContentBuilder builder = XContentFactory.contentBuilder(randomFrom(XContentType.values()));
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if (randomBoolean()) {
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builder.prettyPrint();
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}
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builder.startObject();
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testItem.toXContent(builder, ToXContent.EMPTY_PARAMS);
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builder.endObject();
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XContentParser itemParser = XContentHelper.createParser(builder.bytes());
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itemParser.nextToken();
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/*
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* filter out name of sort, or field name to sort on for element fieldSort
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*/
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itemParser.nextToken();
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String elementName = itemParser.currentName();
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itemParser.nextToken();
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QueryParseContext context = new QueryParseContext(indicesQueriesRegistry);
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context.reset(itemParser);
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NamedWriteable<T> parsedItem = testItem.fromXContent(context, elementName);
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assertNotSame(testItem, parsedItem);
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assertEquals(testItem, parsedItem);
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assertEquals(testItem.hashCode(), parsedItem.hashCode());
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}
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}
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/**
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* Test serialization and deserialization of the test sort.
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*/
|
||||
public void testSerialization() throws IOException {
|
||||
for (int runs = 0; runs < NUMBER_OF_TESTBUILDERS; runs++) {
|
||||
T testsort = createTestItem();
|
||||
T deserializedsort = copyItem(testsort);
|
||||
assertEquals(testsort, deserializedsort);
|
||||
assertEquals(testsort.hashCode(), deserializedsort.hashCode());
|
||||
assertNotSame(testsort, deserializedsort);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Test equality and hashCode properties
|
||||
*/
|
||||
public void testEqualsAndHashcode() throws IOException {
|
||||
for (int runs = 0; runs < NUMBER_OF_TESTBUILDERS; runs++) {
|
||||
T firstsort = createTestItem();
|
||||
assertFalse("sort is equal to null", firstsort.equals(null));
|
||||
assertFalse("sort is equal to incompatible type", firstsort.equals(""));
|
||||
assertTrue("sort is not equal to self", firstsort.equals(firstsort));
|
||||
assertThat("same sort's hashcode returns different values if called multiple times", firstsort.hashCode(),
|
||||
equalTo(firstsort.hashCode()));
|
||||
assertThat("different sorts should not be equal", mutate(firstsort), not(equalTo(firstsort)));
|
||||
assertThat("different sorts should have different hashcode", mutate(firstsort).hashCode(), not(equalTo(firstsort.hashCode())));
|
||||
|
||||
T secondsort = copyItem(firstsort);
|
||||
assertTrue("sort is not equal to self", secondsort.equals(secondsort));
|
||||
assertTrue("sort is not equal to its copy", firstsort.equals(secondsort));
|
||||
assertTrue("equals is not symmetric", secondsort.equals(firstsort));
|
||||
assertThat("sort copy's hashcode is different from original hashcode", secondsort.hashCode(), equalTo(firstsort.hashCode()));
|
||||
|
||||
T thirdsort = copyItem(secondsort);
|
||||
assertTrue("sort is not equal to self", thirdsort.equals(thirdsort));
|
||||
assertTrue("sort is not equal to its copy", secondsort.equals(thirdsort));
|
||||
assertThat("sort copy's hashcode is different from original hashcode", secondsort.hashCode(), equalTo(thirdsort.hashCode()));
|
||||
assertTrue("equals is not transitive", firstsort.equals(thirdsort));
|
||||
assertThat("sort copy's hashcode is different from original hashcode", firstsort.hashCode(), equalTo(thirdsort.hashCode()));
|
||||
assertTrue("equals is not symmetric", thirdsort.equals(secondsort));
|
||||
assertTrue("equals is not symmetric", thirdsort.equals(firstsort));
|
||||
}
|
||||
}
|
||||
|
||||
protected T copyItem(T original) throws IOException {
|
||||
try (BytesStreamOutput output = new BytesStreamOutput()) {
|
||||
original.writeTo(output);
|
||||
try (StreamInput in = new NamedWriteableAwareStreamInput(StreamInput.wrap(output.bytes()), namedWriteableRegistry)) {
|
||||
@SuppressWarnings("unchecked")
|
||||
T prototype = (T) namedWriteableRegistry.getPrototype(getPrototype(), original.getWriteableName());
|
||||
T copy = (T) prototype.readFrom(in);
|
||||
return copy;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
protected abstract Class<T> getPrototype();
|
||||
}
|
||||
|
|
@ -0,0 +1,90 @@
|
|||
/*
|
||||
x * Licensed to Elasticsearch under one or more contributor
|
||||
* license agreements. See the NOTICE file distributed with
|
||||
* this work for additional information regarding copyright
|
||||
* ownership. Elasticsearch 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.elasticsearch.search.sort;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
public class FieldSortBuilderTests extends AbstractSearchSourceItemTestCase<FieldSortBuilder> {
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
public Class<FieldSortBuilder> getPrototype() {
|
||||
return (Class<FieldSortBuilder>) FieldSortBuilder.PROTOTYPE.getClass();
|
||||
}
|
||||
|
||||
@Override
|
||||
protected FieldSortBuilder createTestItem() {
|
||||
String fieldName = randomAsciiOfLengthBetween(1, 10);
|
||||
FieldSortBuilder builder = new FieldSortBuilder(fieldName);
|
||||
if (randomBoolean()) {
|
||||
builder.order(RandomSortDataGenerator.order(builder.order()));
|
||||
}
|
||||
|
||||
if (randomBoolean()) {
|
||||
builder.missing(RandomSortDataGenerator.missing(builder.missing()));
|
||||
}
|
||||
|
||||
if (randomBoolean()) {
|
||||
builder.unmappedType(RandomSortDataGenerator.randomAscii(builder.unmappedType()));
|
||||
}
|
||||
|
||||
if (randomBoolean()) {
|
||||
builder.sortMode(RandomSortDataGenerator.mode(builder.sortMode()));
|
||||
}
|
||||
|
||||
if (randomBoolean()) {
|
||||
builder.setNestedFilter(RandomSortDataGenerator.nestedFilter(builder.getNestedFilter()));
|
||||
}
|
||||
|
||||
if (randomBoolean()) {
|
||||
builder.setNestedPath(RandomSortDataGenerator.randomAscii(builder.getNestedPath()));
|
||||
}
|
||||
|
||||
return builder;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected FieldSortBuilder mutate(FieldSortBuilder original) throws IOException {
|
||||
FieldSortBuilder mutated = new FieldSortBuilder(original);
|
||||
int parameter = randomIntBetween(0, 5);
|
||||
switch (parameter) {
|
||||
case 0:
|
||||
mutated.setNestedPath(RandomSortDataGenerator.randomAscii(mutated.getNestedPath()));
|
||||
break;
|
||||
case 1:
|
||||
mutated.setNestedFilter(RandomSortDataGenerator.nestedFilter(mutated.getNestedFilter()));
|
||||
break;
|
||||
case 2:
|
||||
mutated.sortMode(RandomSortDataGenerator.mode(mutated.sortMode()));
|
||||
break;
|
||||
case 3:
|
||||
mutated.unmappedType(RandomSortDataGenerator.randomAscii(mutated.unmappedType()));
|
||||
break;
|
||||
case 4:
|
||||
mutated.missing(RandomSortDataGenerator.missing(mutated.missing()));
|
||||
break;
|
||||
case 5:
|
||||
mutated.order(RandomSortDataGenerator.order(mutated.order()));
|
||||
break;
|
||||
default:
|
||||
throw new IllegalStateException("Unsupported mutation.");
|
||||
}
|
||||
return mutated;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue