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/*
* Copyright 2000-2022 Vaadin Ltd.
*
* 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 com.vaadin.data;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import com.vaadin.server.SerializableConsumer;
import com.vaadin.server.SerializableFunction;
/**
* Internal implementation of a {@code Result} that collects all possible
* ValidationResults into one list. This class intercepts the normal chaining of
* Converters and Validators, catching and collecting results.
*
* @param <R>
* the result data type
*
* @since 8.2
*/
class ValidationResultWrap<R> implements Result<R> {
private final List<ValidationResult> resultList;
private final Result<R> wrappedResult;
ValidationResultWrap(Result<R> result, List<ValidationResult> resultList) {
this.resultList = resultList;
this.wrappedResult = result;
}
ValidationResultWrap(R value, ValidationResult result) {
if (result.isError()) {
wrappedResult = new SimpleResult<>(null, result.getErrorMessage());
} else {
wrappedResult = new SimpleResult<>(value, null);
}
this.resultList = new ArrayList<>();
this.resultList.add(result);
}
List<ValidationResult> getValidationResults() {
return Collections.unmodifiableList(resultList);
}
Result<R> getWrappedResult() {
return wrappedResult;
}
@Override
public <S> Result<S> flatMap(SerializableFunction<R, Result<S>> mapper) {
Result<S> result = wrappedResult.flatMap(mapper);
if (!(result instanceof ValidationResultWrap)) {
return new ValidationResultWrap<S>(result, resultList);
}
List<ValidationResult> currentResults = new ArrayList<>(resultList);
ValidationResultWrap<S> resultWrap = (ValidationResultWrap<S>) result;
currentResults.addAll(resultWrap.getValidationResults());
return new ValidationResultWrap<>(resultWrap.getWrappedResult(),
currentResults);
}
@Override
public void handle(SerializableConsumer<R> ifOk,
SerializableConsumer<String> ifError) {
wrappedResult.handle(ifOk, ifError);
}
@Override
public boolean isError() {
return wrappedResult.isError();
}
@Override
public Optional<String> getMessage() {
return wrappedResult.getMessage();
}
@Override
public <X extends Throwable> R getOrThrow(
SerializableFunction<String, ? extends X> exceptionProvider)
throws X {
return wrappedResult.getOrThrow(exceptionProvider);
}
}
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