com.arcadedb.query.sql.parser.ProjectionItem Maven / Gradle / Ivy
/*
* Copyright © 2021-present Arcade Data Ltd (info@arcadedata.com)
*
* Licensed 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.
*
* SPDX-FileCopyrightText: 2021-present Arcade Data Ltd (info@arcadedata.com)
* SPDX-License-Identifier: Apache-2.0
*/
/* Generated By:JJTree: Do not edit this line. OProjectionItem.java Version 4.3 */
/* JavaCCOptions:MULTI=true,NODE_USES_PARSER=false,VISITOR=true,TRACK_TOKENS=true,NODE_PREFIX=O,NODE_EXTENDS=,NODE_FACTORY=,SUPPORT_USERTYPE_VISIBILITY_PUBLIC=true */
package com.arcadedb.query.sql.parser;
import com.arcadedb.database.Document;
import com.arcadedb.database.Identifiable;
import com.arcadedb.database.Record;
import com.arcadedb.exception.CommandExecutionException;
import com.arcadedb.query.sql.executor.AggregationContext;
import com.arcadedb.query.sql.executor.CommandContext;
import com.arcadedb.query.sql.executor.InternalResultSet;
import com.arcadedb.query.sql.executor.Result;
import java.util.*;
import java.util.stream.*;
public class ProjectionItem extends SimpleNode {
protected boolean exclude = false;
protected boolean all = false;
protected Identifier alias;
protected Expression expression;
protected Boolean aggregate;
protected NestedProjection nestedProjection;
public ProjectionItem(final Expression expression, final Identifier alias, final NestedProjection nestedProjection) {
super(-1);
this.expression = expression;
this.alias = alias;
this.nestedProjection = nestedProjection;
}
public ProjectionItem(final int id) {
super(id);
}
public boolean isAll() {
if (all)
return true;
return expression != null && "*".equals(expression.toString());
}
public void setAll(final boolean all) {
this.all = all;
}
public Identifier getAlias() {
return alias;
}
public void setAlias(final Identifier alias) {
this.alias = alias;
}
public Expression getExpression() {
return expression;
}
public void setExpression(final Expression expression) {
this.expression = expression;
}
public void toString(final Map params, final StringBuilder builder) {
if (all) {
builder.append("*");
} else {
if (exclude) {
builder.append("!");
}
if (expression != null) {
expression.toString(params, builder);
}
if (nestedProjection != null) {
builder.append(" ");
nestedProjection.toString(params, builder);
}
if (alias != null) {
builder.append(" AS ");
alias.toString(params, builder);
}
}
}
public Object execute(final Record iCurrentRecord, final CommandContext context) {
Object result;
if (all) {
result = iCurrentRecord;
} else {
result = expression.execute(iCurrentRecord, context);
}
if (nestedProjection != null) {
result = nestedProjection.apply(expression, result, context);
}
return convert(result);
}
public Object convert(Object value) {
if (value instanceof InternalResultSet) {
((InternalResultSet) value).reset();
value = ((InternalResultSet) value).stream().collect(Collectors.toList());
}
if (value instanceof Iterator && !(value instanceof Identifiable)) {
final Iterator iter = (Iterator) value;
value = new ArrayList<>();
while (iter.hasNext()) {
((List) value).add(iter.next());
}
}
return value;
}
public Object execute(final Result iCurrentRecord, final CommandContext context) {
Object result;
if (all) {
result = iCurrentRecord;
} else {
result = expression.execute(iCurrentRecord, context);
}
if (nestedProjection != null) {
if (result instanceof Document && ((Document) result).getPropertyNames().isEmpty()) {
((Document) result).reload();
}
result = nestedProjection.apply(expression, result, context);
}
return convert(result);
}
/**
* returns the final alias for this projection item (the explicit alias, if defined, or the default alias)
*
* @return the final alias for this projection item
*/
public String getProjectionAliasAsString() {
return getProjectionAlias().getStringValue();
}
public Identifier getProjectionAlias() {
if (alias != null) {
return alias;
}
final Identifier result;
if (all) {
result = new Identifier("*");
} else {
result = new Identifier(expression.toString());
}
return result;
}
public boolean isExpand() {
return expression.isExpand();
}
public ProjectionItem getExpandContent() {
final ProjectionItem result = new ProjectionItem(-1);
result.setExpression(expression.getExpandContent());
return result;
}
public boolean isAggregate(final CommandContext context) {
if (aggregate != null) {
return aggregate;
}
if (all) {
aggregate = false;
return false;
}
if (expression.isAggregate(context)) {
aggregate = true;
return true;
}
aggregate = false;
return false;
}
/**
* INTERNAL USE ONLY this has to be invoked ONLY if the item is aggregate!!!
*
* @param aggregateSplit
*/
public ProjectionItem splitForAggregation(final AggregateProjectionSplit aggregateSplit, final CommandContext context) {
if (isAggregate(context)) {
final ProjectionItem result = new ProjectionItem(-1);
result.alias = getProjectionAlias();
result.expression = expression.splitForAggregation(aggregateSplit, context);
result.nestedProjection = nestedProjection;
return result;
} else {
return this;
}
}
public AggregationContext getAggregationContext(final CommandContext context) {
if (expression == null) {
throw new CommandExecutionException("Cannot aggregate on this projection: " + this);
}
return expression.getAggregationContext(context);
}
public ProjectionItem copy() {
final ProjectionItem result = new ProjectionItem(-1);
result.exclude = this.exclude;
result.all = all;
result.alias = alias == null ? null : alias.copy();
result.expression = expression == null ? null : expression.copy();
result.nestedProjection = nestedProjection == null ? null : nestedProjection.copy();
result.aggregate = aggregate;
return result;
}
@Override
public boolean equals(final Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
final ProjectionItem that = (ProjectionItem) o;
return exclude == that.exclude && all == that.all && Objects.equals(alias, that.alias) && Objects.equals(expression, that.expression) && Objects.equals(
aggregate, that.aggregate) && Objects.equals(nestedProjection, that.nestedProjection);
}
@Override
public int hashCode() {
return Objects.hash(exclude, all, alias, expression, aggregate, nestedProjection);
}
public void extractSubQueries(final SubQueryCollector collector) {
if (expression != null) {
expression.extractSubQueries(collector);
}
}
public boolean refersToParent() {
if (expression != null) {
return expression.refersToParent();
}
return false;
}
public void setNestedProjection(final NestedProjection nestedProjection) {
this.nestedProjection = nestedProjection;
}
@Override
protected SimpleNode[] getCacheableElements() {
return new SimpleNode[] { expression };
}
}
/* JavaCC - OriginalChecksum=6d6010734c7434a6f516e2eac308e9ce (do not edit this line) */