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        Map<String, Object> rc = new LinkedHashMap<>(properties.size());
034
035        for (Iterator<Map.Entry<String, Object>> it = properties.entrySet().iterator(); it.hasNext();) {
036            Map.Entry<String, Object> entry = it.next();
037            String name = entry.getKey();
038            if (name.startsWith(optionPrefix)) {
039                Object value = properties.get(name);
040                name = name.substring(optionPrefix.length());
041                rc.put(name, value);
042
043                if (remove) {
044                    it.remove();
045                }
046            }
047        }
048
049        return rc;
050    }
051
052    @Deprecated
053    public static Map<String, String> extractStringProperties(Map<String, Object> properties) {
054        Map<String, String> rc = new LinkedHashMap<>(properties.size());
055
056        for (Map.Entry<String, Object> entry : properties.entrySet()) {
057            String name = entry.getKey();
058            String value = entry.getValue().toString();
059            rc.put(name, value);
060        }
061
062        return rc;
063    }
064
065    public static boolean hasProperties(Map<String, Object> properties, String optionPrefix) {
066        ObjectHelper.notNull(properties, "properties");
067
068        if (ObjectHelper.isNotEmpty(optionPrefix)) {
069            for (Object o : properties.keySet()) {
070                String name = (String) o;
071                if (name.startsWith(optionPrefix)) {
072                    return true;
073                }
074            }
075            // no parameters with this prefix
076            return false;
077        } else {
078            return !properties.isEmpty();
079        }
080    }
081
082}