com.google.gerrit.server.git.validators.RefOperationValidators.java Source code

Introduction

Here is the source code for com.google.gerrit.server.git.validators.RefOperationValidators.java

Source

// Copyright (C) 2014 The Android Open Source Project
//
// 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.google.gerrit.server.git.validators;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.gerrit.extensions.registration.DynamicSet;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.events.RefReceivedEvent;
import com.google.gerrit.server.validators.ValidationException;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;

import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

public class RefOperationValidators {
    private static final GetErrorMessages GET_ERRORS = new GetErrorMessages();
    private static final Logger LOG = LoggerFactory.getLogger(RefOperationValidators.class);

    public interface Factory {
        RefOperationValidators create(Project project, IdentifiedUser user, ReceiveCommand cmd);
    }

    public static ReceiveCommand getCommand(RefUpdate update, ReceiveCommand.Type type) {
        return new ReceiveCommand(update.getOldObjectId(), update.getNewObjectId(), update.getName(), type);
    }

    private final RefReceivedEvent event;
    private final DynamicSet<RefOperationValidationListener> refOperationValidationListeners;

    @Inject
    RefOperationValidators(DynamicSet<RefOperationValidationListener> refOperationValidationListeners,
            @Assisted Project project, @Assisted IdentifiedUser user, @Assisted ReceiveCommand cmd) {
        this.refOperationValidationListeners = refOperationValidationListeners;
        event = new RefReceivedEvent();
        event.command = cmd;
        event.project = project;
        event.user = user;
    }

    public List<ValidationMessage> validateForRefOperation() throws RefOperationValidationException {

        List<ValidationMessage> messages = Lists.newArrayList();
        boolean withException = false;
        try {
            for (RefOperationValidationListener listener : refOperationValidationListeners) {
                messages.addAll(listener.onRefOperation(event));
            }
        } catch (ValidationException e) {
            messages.add(new ValidationMessage(e.getMessage(), true));
            withException = true;
        }

        if (withException) {
            throwException(messages, event);
        }

        return messages;
    }

    private void throwException(Iterable<ValidationMessage> messages, RefReceivedEvent event)
            throws RefOperationValidationException {
        Iterable<ValidationMessage> errors = Iterables.filter(messages, GET_ERRORS);
        String header = String.format("Ref \"%s\" %S in project %s validation failed", event.command.getRefName(),
                event.command.getType(), event.project.getName());
        LOG.error(header);
        throw new RefOperationValidationException(header, errors);
    }

    private static class GetErrorMessages implements Predicate<ValidationMessage> {
        @Override
        public boolean apply(ValidationMessage input) {
            return input.isError();
        }
    }
}