com.github.robozonky.internal.util.ToStringBuilder.java Source code

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Here is the source code for com.github.robozonky.internal.util.ToStringBuilder.java

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/*
 * Copyright 2019 The RoboZonky 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.github.robozonky.internal.util;

import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.Collection;
import java.util.stream.Stream;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.apache.logging.log4j.Logger;

public final class ToStringBuilder {

    private final ReflectionToStringBuilder builder;

    private ToStringBuilder(final Object o, final String... excludeFields) {
        final String[] fieldExclusions = Stream.concat(Stream.of("password"), Arrays.stream(excludeFields))
                .distinct().toArray(String[]::new);
        this.builder = new CustomReflectionToStringBuilder(o).setExcludeFieldNames(fieldExclusions);
    }

    public static String createFor(final Object o, final String... excludeFields) {
        return new ToStringBuilder(o, excludeFields).toString();
    }

    @Override
    public String toString() {
        return this.builder.toString();
    }

    private static class CustomReflectionToStringBuilder extends ReflectionToStringBuilder {

        private static final int MAX_STRING_LENGTH = 70;

        // ignore passwords and loggers
        private static final Collection<Class<?>> IGNORED_TYPES = Arrays.asList(char[].class, Logger.class);

        public CustomReflectionToStringBuilder(final Object o) {
            super(o);
        }

        @Override
        protected boolean accept(final Field field) {
            return super.accept(field) && !IGNORED_TYPES.contains(field.getType());
        }

        @Override
        protected Object getValue(final Field field) throws IllegalAccessException {
            final Object value = super.getValue(field);
            if (value instanceof String) { // long strings will get truncated
                final String stringValue = (String) value;
                return StringUtils.abbreviate(stringValue, MAX_STRING_LENGTH);
            } else {
                return value;
            }
        }
    }
}