com.github.triceo.robozonky.internal.api.ToStringBuilder Maven / Gradle / Ivy

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/*
 * Copyright 2017 Lukáš Petrovický
 *
 * 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.triceo.robozonky.internal.api;

import java.lang.reflect.Field;
import java.util.Objects;

import org.apache.commons.lang3.builder.ReflectionToStringBuilder;

public class ToStringBuilder {

    private final ReflectionToStringBuilder builder;

    public ToStringBuilder(final Object o, final String... excludeFields) {
        this.builder = new ToStringBuilder.CustomReflectionToStringBuilder(o)
                .setExcludeFieldNames(excludeFields);
    }


    public ToStringBuilder(final Object o) {
        this(o, "password");
    }

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

    private static class CustomReflectionToStringBuilder extends ReflectionToStringBuilder {

        private static final int MAX_STRING_LENGTH = 70;

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

        @Override
        protected boolean accept(final Field field) { // ignore passwords
            return super.accept(field) && (!Objects.equals(field.getType(), char[].class));
        }

        @Override
        protected Object getValue(final Field field) throws IllegalAccessException {
            final Object value = super.getValue(field);
            if (value != null && Objects.equals(field.getType(), String.class)) { // long strings will get truncated
                final String stringValue = (String)value;
                final int length = ToStringBuilder.CustomReflectionToStringBuilder.MAX_STRING_LENGTH;
                if (stringValue.length() > length) {
                    return stringValue.substring(0, length) + "...";
                }
            }
            return value;
        }

    }
}