Java tutorial
/* * Copyright 2015 QSense, Inc. * * 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 io.sidecar; import com.google.common.base.CharMatcher; import com.google.common.collect.ImmutableList; import io.sidecar.query.Arg; import org.apache.commons.lang.StringUtils; import static com.google.common.base.Preconditions.checkArgument; public class ModelUtils { public static boolean isValidStreamId(String stream) { return StringUtils.isNotBlank(stream) && CharMatcher.WHITESPACE.matchesNoneOf(stream); } public static boolean isValidReadingKey(String key) { return StringUtils.isNotBlank(key) && key.length() <= 40 && CharMatcher.WHITESPACE.matchesNoneOf(key); } public static String getArgKeyValue(String key, ImmutableList<Arg> args) { for (Arg a : args) { if (a.getKey().equalsIgnoreCase(key)) { return a.getValue(); } } return null; } //Accept all ASCII punctuation, digits, and letters private static final CharMatcher ASCII_NO_WHITESPACE_OR_NON_PRINTING = CharMatcher.inRange('!', '~'); public static boolean isValidDeviceId(String deviceId) { return StringUtils.isNotBlank(deviceId) && deviceId.length() >= 8 && deviceId.length() <= 40 && ASCII_NO_WHITESPACE_OR_NON_PRINTING.matchesAllOf(deviceId); } }