CommandResultBuilder.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.kie.workbench.common.stunner.core.command.impl;

import java.util.Collection;
import java.util.LinkedList;

import org.jboss.errai.common.client.api.annotations.NonPortable;
import org.kie.workbench.common.stunner.core.command.CommandResult;

@NonPortable
public abstract class CommandResultBuilder<V> {

    private CommandResult.Type type = CommandResult.Type.INFO;
    private final Collection<V> violations = new LinkedList<>();

    public abstract CommandResult.Type getType(final V violation);

    public CommandResultBuilder() {
    }

    public CommandResultBuilder(final Collection<V> violations) {
        this.violations.addAll(violations);
    }

    public CommandResultBuilder<V> addViolation(final V violation) {
        this.violations.add(violation);
        return this;
    }

    public CommandResultBuilder<V> addViolations(final Collection<V> violations) {
        this.violations.addAll(violations);
        return this;
    }

    public CommandResultBuilder<V> setType(final CommandResult.Type type) {
        this.type = type;
        return this;
    }

    public CommandResult<V> build() {
        violations.forEach(v -> {
            final CommandResult.Type violationType = getType(v);
            if (violationType.getSeverity() > this.type.getSeverity()) {
                this.type = violationType;
            }
        });
        return new CommandResultImpl<>(this.type,
                                       this.violations);
    }
}