Source code
Description: source: package: org.apache.commons.validator.util, class: ValidatorUtils

    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      https://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.validator.util;
    018
    019import java.util.Collection;
    020import java.util.HashMap;
    021import java.util.Iterator;
    022import java.util.Map;
    023import java.util.Map.Entry;
    024
    025import org.apache.commons.beanutils.PropertyUtils;
    026import org.apache.commons.collections.FastHashMap; // DEPRECATED
    027import org.apache.commons.logging.Log;
    028import org.apache.commons.logging.LogFactory;
    029import org.apache.commons.validator.Arg;
    030import org.apache.commons.validator.Msg;
    031import org.apache.commons.validator.Var;
    032
    033/**
    034 * Basic utility methods.
    035 * <p>
    036 * The use of FastHashMap is deprecated and will be replaced in a future
    037 * release.
    038 * </p>
    039 */
    040public class ValidatorUtils {
    041
    042    private static final Log LOG = LogFactory.getLog(ValidatorUtils.class);
    043
    044    /**
    045     * Makes a deep copy of a {@code FastHashMap} if the values
    046     * are {@code Msg}, {@code Arg},
    047     * or {@code Var}. Otherwise, it is a shallow copy.
    048     *
    049     * @param fastHashMap {@code FastHashMap} to copy.
    050     * @return FastHashMap A copy of the {@code FastHashMap} that was
    051     * passed in.
    052     * @deprecated This method is not part of Validator's public API.  Validator
    053     * will use it internally until FastHashMap references are removed.  Use
    054     * copyMap() instead.
    055     */
    056    @Deprecated
    057    public static FastHashMap copyFastHashMap(final FastHashMap fastHashMap) {
    058        final FastHashMap results = new FastHashMap();
    059        @SuppressWarnings("unchecked") // FastHashMap is not generic
    060        final Iterator<Entry<String, ?>> iterator = fastHashMap.entrySet().iterator();
    061        while (iterator.hasNext()) {
    062            final Entry<String, ?> entry = iterator.next();
    063            final String key = entry.getKey();
    064            final Object value = entry.getValue();
    065            if (value instanceof Msg) {
    066                results.put(key, ((Msg) value).clone());
    067            } else if (value instanceof Arg) {
    068                results.put(key, ((Arg) value).clone());
    069            } else if (value instanceof Var) {
    070                results.put(key, ((Var) value).clone());
    071            } else {
    072                results.put(key, value);
    073            }
    074        }
    075        results.setFast(true);
    076        return results;
    077    }
    078
    079    /**
    080     * Makes a deep copy of a {@link Map} if the values are
    081     * {@code Msg}, {@code Arg}, or {@code Var}.  Otherwise,
    082     * it is a shallow copy.
    083     *
    084     * @param map The source Map to copy.
    085     * @return A copy of the {@link Map} that was passed in.
    086     */
    087    public static Map<String, Object> copyMap(final Map<String, Object> map) {
    088        final Map<String, Object> results = new HashMap<>(map.size());
    089        map.forEach((key, value) -> {
    090            if (value instanceof Msg) {
    091                results.put(key, ((Msg) value).clone());
    092            } else if (value instanceof Arg) {
    093                results.put(key, ((Arg) value).clone());
    094            } else if (value instanceof Var) {
    095                results.put(key, ((Var) value).clone());
    096            } else {
    097                results.put(key, value);
    098            }
    099        });
    100        return results;
    101    }
    102
    103    /**
    104     * Convenience method for getting a value from a bean property as a
    105     * {@link String}.  If the property is a {@code String[]} or
    106     * {@link Collection} and it is empty, an empty {@link String}
    107     * "" is returned.  Otherwise, property.toString() is returned.  This method
    108     * may return {@code null} if there was an error retrieving the
    109     * property.
    110     *
    111     * @param bean The bean object.
    112     * @param property The name of the property to access.
    113     * @return The value of the property.
    114     */
    115    public static String getValueAsString(final Object bean, final String property) {
    116        Object value = null;
    117
    118        try {
    119            value = PropertyUtils.getProperty(bean, property);
    120
    121        } catch (final ReflectiveOperationException e) {
    122            LOG.error(e.getMessage(), e);
    123        }
    124
    125        if (value == null) {
    126            return null;
    127        }
    128
    129        if (value instanceof String[]) {
    130            return ((String[]) value).length > 0 ? value.toString() : "";
    131
    132        }
    133        if (value instanceof Collection) {
    134            return ((Collection<?>) value).isEmpty() ? "" : value.toString();
    135
    136        }
    137        return value.toString();
    138
    139    }
    140
    141    /**
    142     * Replace part of a {@link String} with another value.
    143     *
    144     * @param value {@link String} to perform the replacement on.
    145     * @param key The name of the constant.
    146     * @param replaceValue The value of the constant.
    147     * @return The modified value.
    148     */
    149    public static String replace(final String value, final String key, final String replaceValue) {
    150        if (value == null || key == null || replaceValue == null) {
    151            return value;
    152        }
    153        return value.replace(key, replaceValue);
    154    }
    155
    156    /**
    157     * Constructs a new instance.
    158     *
    159     * @deprecated Will be private in the next major version.
    160     */
    161    @Deprecated
    162    public ValidatorUtils() {
    163        // empty
    164    }
    165
    166}