io.vertx.sqlclient.impl.QueryResultBuilder Maven / Gradle / Ivy
/*
* Copyright (C) 2017 Julien Viet
*
* 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.
*
*/
package io.vertx.sqlclient.impl;
import io.vertx.core.Future;
import io.vertx.core.Promise;
import io.vertx.core.impl.ContextInternal;
import io.vertx.core.impl.future.PromiseInternal;
import io.vertx.sqlclient.PropertyKind;
import io.vertx.sqlclient.SqlResult;
import java.util.function.Function;
/**
* A query result for building a {@link SqlResult}.
*/
public class QueryResultBuilder, L extends SqlResult> implements QueryResultHandler, Promise {
private final Promise handler;
private final Function factory;
public R first;
private R current;
private Throwable failure;
private boolean suspended;
QueryResultBuilder(Function factory, PromiseInternal handler) {
this.factory = factory;
this.handler = handler;
}
@Override
public void handleResult(int updatedCount, int size, RowDesc desc, T result, Throwable failure) {
if (failure != null) {
this.failure = failure;
} else {
R r = factory.apply(result);
r.updated = updatedCount;
r.size = size;
r.columnNames = desc != null ? desc.columnNames() : null;
r.columnDescriptors = desc != null ? desc.columnDescriptor() : null;
handleResult(r);
}
}
private void handleResult(R result) {
R c = current;
if (c == null) {
first = result;
current = result;
} else {
c.next = result;
current = result;
}
}
@Override
public void addProperty(PropertyKind property, V value) {
R r = this.current;
if (r != null) {
if (r.properties == null) {
r.properties = new PropertyKindMap();
}
r.properties.put(property, value);
}
}
@Override
public boolean tryComplete(Boolean result) {
suspended = result;
if (failure != null) {
return tryFail(failure);
} else {
return handler.tryComplete((L) first);
}
}
@Override
public boolean tryFail(Throwable cause) {
return handler.tryFail(cause);
}
@Override
public Future future() {
return handler.future().map(l -> isSuspended());
}
public boolean isSuspended() {
return suspended;
}
}