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/*
* 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.action.fieldstats;
import org.elasticsearch.Version;
import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.ValidateActions;
import org.elasticsearch.action.support.broadcast.BroadcastRequest;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentHelper;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentParser.Token;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
*/
public class FieldStatsRequest extends BroadcastRequest {
public final static String DEFAULT_LEVEL = "cluster";
private String[] fields = Strings.EMPTY_ARRAY;
private String level = DEFAULT_LEVEL;
private IndexConstraint[] indexConstraints = new IndexConstraint[0];
public String[] getFields() {
return fields;
}
public void setFields(String[] fields) {
if (fields == null) {
throw new NullPointerException("specified fields can't be null");
}
this.fields = fields;
}
public IndexConstraint[] getIndexConstraints() {
return indexConstraints;
}
public void setIndexConstraints(IndexConstraint[] indexConstraints) {
if (indexConstraints == null) {
throw new NullPointerException("specified index_contraints can't be null");
}
this.indexConstraints = indexConstraints;
}
public void source(BytesReference content) throws IOException {
List indexConstraints = new ArrayList<>();
List fields = new ArrayList<>();
try (XContentParser parser = XContentHelper.createParser(content)) {
String fieldName = null;
Token token = parser.nextToken();
assert token == Token.START_OBJECT;
for (token = parser.nextToken(); token != Token.END_OBJECT; token = parser.nextToken()) {
switch (token) {
case FIELD_NAME:
fieldName = parser.currentName();
break;
case START_OBJECT:
if ("index_constraints".equals(fieldName)) {
parseIndexContraints(indexConstraints, parser);
} else {
throw new IllegalArgumentException("unknown field [" + fieldName + "]");
}
break;
case START_ARRAY:
if ("fields".equals(fieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token.isValue()) {
fields.add(parser.text());
} else {
throw new IllegalArgumentException("unexpected token [" + token + "]");
}
}
} else {
throw new IllegalArgumentException("unknown field [" + fieldName + "]");
}
break;
default:
throw new IllegalArgumentException("unexpected token [" + token + "]");
}
}
}
this.fields = fields.toArray(new String[fields.size()]);
this.indexConstraints = indexConstraints.toArray(new IndexConstraint[indexConstraints.size()]);
}
private void parseIndexContraints(List indexConstraints, XContentParser parser) throws IOException {
Token token = parser.currentToken();
assert token == Token.START_OBJECT;
String field = null;
String currentName = null;
for (token = parser.nextToken(); token != Token.END_OBJECT; token = parser.nextToken()) {
if (token == Token.FIELD_NAME) {
field = currentName = parser.currentName();
} else if (token == Token.START_OBJECT) {
for (Token fieldToken = parser.nextToken(); fieldToken != Token.END_OBJECT; fieldToken = parser.nextToken()) {
if (fieldToken == Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (fieldToken == Token.START_OBJECT) {
IndexConstraint.Property property = IndexConstraint.Property.parse(currentName);
String value = null;
String optionalFormat = null;
IndexConstraint.Comparison comparison = null;
for (Token propertyToken = parser.nextToken(); propertyToken != Token.END_OBJECT; propertyToken = parser.nextToken()) {
if (propertyToken.isValue()) {
if ("format".equals(parser.currentName())) {
optionalFormat = parser.text();
} else {
comparison = IndexConstraint.Comparison.parse(parser.currentName());
value = parser.text();
}
} else {
if (propertyToken != Token.FIELD_NAME) {
throw new IllegalArgumentException("unexpected token [" + propertyToken + "]");
}
}
}
indexConstraints.add(new IndexConstraint(field, property, comparison, value, optionalFormat));
} else {
throw new IllegalArgumentException("unexpected token [" + fieldToken + "]");
}
}
} else {
throw new IllegalArgumentException("unexpected token [" + token + "]");
}
}
}
public String level() {
return level;
}
public void level(String level) {
this.level = level;
}
@Override
public ActionRequestValidationException validate() {
ActionRequestValidationException validationException = super.validate();
if ("cluster".equals(level) == false && "indices".equals(level) == false) {
validationException = ValidateActions.addValidationError("invalid level option [" + level + "]", validationException);
}
if (fields == null || fields.length == 0) {
validationException = ValidateActions.addValidationError("no fields specified", validationException);
}
return validationException;
}
@Override
public void readFrom(StreamInput in) throws IOException {
super.readFrom(in);
fields = in.readStringArray();
int size = in.readVInt();
indexConstraints = new IndexConstraint[size];
for (int i = 0; i < size; i++) {
indexConstraints[i] = new IndexConstraint(in);
}
level = in.readString();
}
@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
out.writeStringArrayNullable(fields);
out.writeVInt(indexConstraints.length);
for (IndexConstraint indexConstraint : indexConstraints) {
out.writeString(indexConstraint.getField());
out.writeByte(indexConstraint.getProperty().getId());
out.writeByte(indexConstraint.getComparison().getId());
out.writeString(indexConstraint.getValue());
if (out.getVersion().onOrAfter(Version.V_2_0_1)) {
out.writeOptionalString(indexConstraint.getOptionalFormat());
}
}
out.writeString(level);
}
}