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 *      http://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.camel.util;
018
019import java.util.Iterator;
020import java.util.LinkedHashMap;
021import java.util.Map;
022
023public final class PropertiesHelper {
024
025    private PropertiesHelper() {
026    }
027
028    public static Map<String, Object> extractProperties(Map<String, Object> properties, String optionPrefix) {
029        return extractProperties(properties, optionPrefix, true);
030    }
031
032    public static Map<String, Object> extractProperties(Map<String, Object> properties, String optionPrefix, boolean remove) {
033        ObjectHelper.notNull(properties, "properties");
034
035        Map<String, Object> rc = new LinkedHashMap<>(properties.size());
036
037        for (Iterator<Map.Entry<String, Object>> it = properties.entrySet().iterator(); it.hasNext();) {
038            Map.Entry<String, Object> entry = it.next();
039            String name = entry.getKey();
040            if (name.startsWith(optionPrefix)) {
041                Object value = properties.get(name);
042                name = name.substring(optionPrefix.length());
043                rc.put(name, value);
044
045                if (remove) {
046                    it.remove();
047                }
048            }
049        }
050
051        return rc;
052    }
053
054    @Deprecated
055    public static Map<String, String> extractStringProperties(Map<String, Object> properties) {
056        ObjectHelper.notNull(properties, "properties");
057
058        Map<String, String> rc = new LinkedHashMap<>(properties.size());
059
060        for (Map.Entry<String, Object> entry : properties.entrySet()) {
061            String name = entry.getKey();
062            String value = entry.getValue().toString();
063            rc.put(name, value);
064        }
065
066        return rc;
067    }
068
069    public static boolean hasProperties(Map<String, Object> properties, String optionPrefix) {
070        ObjectHelper.notNull(properties, "properties");
071
072        if (ObjectHelper.isNotEmpty(optionPrefix)) {
073            for (Object o : properties.keySet()) {
074                String name = (String) o;
075                if (name.startsWith(optionPrefix)) {
076                    return true;
077                }
078            }
079            // no parameters with this prefix
080            return false;
081        } else {
082            return !properties.isEmpty();
083        }
084    }
085    
086}