package org.jooq.impl;
import static org.jooq.SQLDialect.MYSQL;
import static org.jooq.conf.ParamType.INLINED;
import static org.jooq.impl.DSL.inline;
import static org.jooq.impl.DSL.keyword;
import static org.jooq.impl.DSL.rowNumber;
import static org.jooq.impl.DSL.select;
import static org.jooq.impl.DSL.val;
import static org.jooq.impl.Keywords.K_COLUMNS;
import static org.jooq.impl.Keywords.K_ERROR;
import static org.jooq.impl.Keywords.K_FOR;
import static org.jooq.impl.Keywords.K_JSON_TABLE;
import static org.jooq.impl.Keywords.K_ON;
import static org.jooq.impl.Keywords.K_ORDINALITY;
import static org.jooq.impl.Keywords.K_PATH;
import static org.jooq.impl.Keywords.K_WITH;
import static org.jooq.impl.Names.N_JSON_TABLE;
import static org.jooq.impl.Names.N_OPENJSON;
import static org.jooq.impl.SQLDataType.JSONB;
import static org.jooq.impl.Tools.visitSubquery;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.jooq.Context;
import org.jooq.DataType;
import org.jooq.Field;
import org.jooq.JSONB;
import org.jooq.JSONTableColumnPathStep;
import org.jooq.Name;
import org.jooq.Record;
import org.jooq.SQLDialect;
import org.jooq.SelectField;
import org.jooq.TableOptions;
import org.jooq.conf.ParamType;
final class JSONTable
extends AbstractTable<Record>
implements
JSONTableColumnPathStep {
private static final long serialVersionUID = -4881363881968319258L;
private static final Set<SQLDialect> REQUIRES_COLUMN_PATH = SQLDialect.supportedBy(MYSQL);
private final Field<String> path;
private final Field<?> json;
private final QueryPartList<JSONTableColumn> columns;
private final boolean hasOrdinality;
private transient Fields<Record> fields;
JSONTable(Field<?> json, Field<String> path) {
this(json, path, null, false);
}
private JSONTable(
Field<?> json,
Field<String> path,
QueryPartList<JSONTableColumn> columns,
boolean hasOrdinality
) {
super(TableOptions.expression(), N_JSON_TABLE);
this.json = json;
this.path = path;
this.columns = columns == null ? new QueryPartList<>() : columns;
this.hasOrdinality = hasOrdinality;
}
@Override
public final JSONTable column(String name) {
return column(DSL.name(name));
}
@Override
public final JSONTable column(Name name) {
return column(DSL.field(name));
}
@Override
public final JSONTable column(Field<?> name) {
return column(name, name.getDataType());
}
@Override
public final JSONTable column(String name, DataType<?> type) {
return column(DSL.name(name), type);
}
@Override
public final JSONTable column(Name name, DataType<?> type) {
return column(DSL.field(name), type);
}
@Override
public final JSONTable column(Field<?> name, DataType<?> type) {
QueryPartList<JSONTableColumn> c = new QueryPartList<>(columns);
c.add(new JSONTableColumn(name, type, false, null));
return new JSONTable(json, path, c, hasOrdinality);
}
@Override
public final JSONTable forOrdinality() {
return path0(true, null);
}
@Override
public final JSONTable path(String p) {
return path0(false, p);
}
private final JSONTable path0(boolean forOrdinality, String p) {
QueryPartList<JSONTableColumn> c = new QueryPartList<>(columns);
int i = c.size() - 1;
JSONTableColumn last = c.get(i);
c.set(i, new JSONTableColumn(last.field, last.type, forOrdinality, p));
return new JSONTable(json, path, c, hasOrdinality || forOrdinality);
}
@Override
public final Class<? extends Record> getRecordType() {
return RecordImplN.class;
}
@Override
final Fields<Record> fields0() {
if (fields == null) {
List<Field<?>> f = new ArrayList<>();
for (JSONTableColumn c : columns)
f.add(c.field.getDataType() == c.type ? c.field : DSL.field(c.field.getQualifiedName(), c.type));
fields = new Fields<>(f);
}
return fields;
}
@Override
public final void accept(Context<?> ctx) {
switch (ctx.family()) {
case POSTGRES:
acceptPostgres(ctx);
break;
default:
acceptStandard(ctx);
break;
}
}
private final void acceptPostgres(Context<?> ctx) {
List<SelectField<?>> cols = new ArrayList<>();
for (JSONTableColumn col : columns)
if (col.forOrdinality)
cols.add(DSL.field("o").as(col.field));
else
cols.add(
DSL.field("(jsonb_path_query_first(j, {0}::jsonpath)->>0)::{1}",
col.path != null ? val(col.path) : inline("$." + col.field.getName()),
keyword(col.type.getCastTypeName(ctx.configuration()))
).as(col.field)
);
visitSubquery(
ctx,
select(cols).from(hasOrdinality
? "jsonb_path_query({0}, {1}::jsonpath) {with} {ordinality} {as} t(j, o)"
: "jsonb_path_query({0}, {1}::jsonpath) {as} t(j)",
json.getType() == JSONB.class ? json : json.cast(JSONB),
path
),
true
);
}
private final void acceptStandard(Context<?> ctx) {
ctx.visit(K_JSON_TABLE).sql('(')
.formatIndentStart()
.formatNewLine();
ctx.visit(json).sql(',').formatSeparator();
acceptJSONPath(ctx);
ctx.formatSeparator().visit(K_COLUMNS).sql(" (").visit(columns).sql(')');
ctx.formatIndentEnd()
.formatNewLine()
.sql(')');
}
private final void acceptJSONPath(Context<?> ctx) {
ctx.visit(path);
}
@Override
public boolean declaresTables() {
return true;
}
private static class JSONTableColumn extends AbstractQueryPart {
private static final long serialVersionUID = 783627375014050176L;
final Field<?> field;
final DataType<?> type;
final boolean forOrdinality;
final String path;
JSONTableColumn(Field<?> field, DataType<?> type, boolean forOrdinality, String path) {
this.field = field;
this.type = type;
this.forOrdinality = forOrdinality;
this.path = path;
}
@Override
public final void accept(Context<?> ctx) {
boolean previous = ctx.qualify();
ctx.qualify(false)
.visit(field)
.qualify(previous)
.sql(' ');
if (forOrdinality)
ctx.visit(K_FOR).sql(' ').visit(K_ORDINALITY);
else
Tools.toSQLDDLTypeDeclaration(ctx, type);
String p =
path != null
? path
: !forOrdinality && REQUIRES_COLUMN_PATH.contains(ctx.dialect())
? "$." + field.getName()
: null;
if (p != null)
ctx.sql(' ').visit(K_PATH).sql(' ').visit(inline(p));
}
}
}