de.vandermeer.skb.interfaces.messagesets.IsErrorSetFT.java Source code

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Here is the source code for de.vandermeer.skb.interfaces.messagesets.IsErrorSetFT.java

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/* Copyright 2016 Sven van der Meer <vdmeer.sven@mykolab.com>
 *
 * 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 de.vandermeer.skb.interfaces.messagesets;

import java.util.LinkedHashSet;
import java.util.Set;

import org.apache.commons.lang3.Validate;
import org.apache.commons.lang3.text.StrBuilder;
import org.slf4j.helpers.FormattingTuple;
import org.slf4j.helpers.MessageFormatter;

/**
 * Interface for objects that have a set of error messages of type {@link FormattingTuple}.
 *
 * @author     Sven van der Meer &lt;vdmeer.sven@mykolab.com&gt;
 * @version    v0.0.2 build 170502 (02-May-17) for Java 1.8
 * @since      v0.0.1
 */
public interface IsErrorSetFT extends IsErrorSet<FormattingTuple> {

    /**
     * Adds all errors from given error set.
     * @param errors errors to add
     */
    default void addAllErrors(IsErrorSetFT errors) {
        this.getErrorMessages().addAll(errors.getErrorMessages());
    }

    /**
     * Adds a new error.
     * @param error the error message, should not be blank
     * @throws NullPointerException if `error` was null
     * @throws IllegalArgumentException if `error` was blank
     */
    default void addError(String error) {
        Validate.notBlank(error);
        this.addError(MessageFormatter.arrayFormat(error, new Object[0]));
    }

    /**
     * Adds a new error.
     * @param error the error message, should not be blank
     * @param obj the elements for the error message, should not be null and have no null elements
     * @throws NullPointerException if `error` or `obj` was null
     * @throws IllegalArgumentException if `error` was blank or `obj` contained null elements
     */
    default void addError(String error, Object... obj) {
        Validate.notBlank(error);
        Validate.notNull(obj);
        Validate.noNullElements(obj);
        this.addError(MessageFormatter.arrayFormat(error, obj));
    }

    /**
     * Renders the error set.
     * Each element in the error set is rendered in a single line.
     * @return rendered object
     */
    @Override
    default String render() {
        StrBuilder ret = new StrBuilder(100);
        for (FormattingTuple ft : this.getErrorMessages()) {
            ret.append(ft.getMessage()).appendNewLine();
        }
        return ret.toString();
    }

    /**
     * Creates a new error set.
     * @return new error set
     */
    static IsErrorSetFT create() {
        return new IsErrorSetFT() {
            final Set<FormattingTuple> errorSet = new LinkedHashSet<>();

            @Override
            public Set<FormattingTuple> getErrorMessages() {
                return this.errorSet;
            }
        };
    }
}