Java tutorial
package ca.uhn.fhir.rest.param; /* * #%L * HAPI FHIR - Core Library * %% * Copyright (C) 2014 - 2016 University Health Network * %% * 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. * #L% */ import java.util.ArrayList; import java.util.Calendar; import java.util.Collections; import java.util.Date; import java.util.HashSet; import java.util.List; import java.util.Set; import org.apache.commons.lang3.time.DateUtils; import ca.uhn.fhir.model.primitive.InstantDt; import ca.uhn.fhir.model.primitive.IntegerDt; import ca.uhn.fhir.util.UrlUtil; public class ParameterUtil { private static final Set<Class<?>> BINDABLE_INTEGER_TYPES; private static final Set<Class<?>> BINDABLE_TIME_TYPES; static { HashSet<Class<?>> intTypes = new HashSet<Class<?>>(); intTypes.add(IntegerDt.class); intTypes.add(Integer.class); BINDABLE_INTEGER_TYPES = Collections.unmodifiableSet(intTypes); HashSet<Class<?>> timeTypes = new HashSet<Class<?>>(); timeTypes.add(InstantDt.class); timeTypes.add(Date.class); timeTypes.add(Calendar.class); BINDABLE_TIME_TYPES = Collections.unmodifiableSet(timeTypes); } // public static Integer findSinceParameterIndex(Method theMethod) { // return findParamIndex(theMethod, Since.class); // } public static int nonEscapedIndexOf(String theString, char theCharacter) { for (int i = 0; i < theString.length(); i++) { if (theString.charAt(i) == theCharacter) { if (i == 0 || theString.charAt(i - 1) != '\\') { return i; } } } return -1; } public static Object fromInstant(Class<?> theType, InstantDt theArgument) { if (theType.equals(InstantDt.class)) { if (theArgument == null) { return new InstantDt(); } return theArgument; } if (theType.equals(Date.class)) { if (theArgument == null) { return null; } return theArgument.getValue(); } if (theType.equals(Calendar.class)) { if (theArgument == null) { return null; } return DateUtils.toCalendar(theArgument.getValue()); } throw new IllegalArgumentException("Invalid instant type:" + theType); } public static Object fromInteger(Class<?> theType, IntegerDt theArgument) { if (theType.equals(IntegerDt.class)) { if (theArgument == null) { return new IntegerDt(); } return theArgument; } if (theType.equals(Integer.class)) { if (theArgument == null) { return null; } return theArgument.getValue(); } throw new IllegalArgumentException("Invalid Integer type:" + theType); } public static Set<Class<?>> getBindableInstantTypes() { return BINDABLE_TIME_TYPES; } public static Set<Class<?>> getBindableIntegerTypes() { return BINDABLE_INTEGER_TYPES; } public static InstantDt toInstant(Object theArgument) { if (theArgument instanceof InstantDt) { return (InstantDt) theArgument; } if (theArgument instanceof Date) { return new InstantDt((Date) theArgument); } if (theArgument instanceof Calendar) { return new InstantDt((Calendar) theArgument); } return null; } public static IntegerDt toInteger(Object theArgument) { if (theArgument instanceof IntegerDt) { return (IntegerDt) theArgument; } if (theArgument instanceof Integer) { return new IntegerDt((Integer) theArgument); } return null; } static List<String> splitParameterString(String theInput, boolean theUnescapeComponents) { return splitParameterString(theInput, ',', theUnescapeComponents); } static List<String> splitParameterString(String theInput, char theDelimiter, boolean theUnescapeComponents) { ArrayList<String> retVal = new ArrayList<String>(); if (theInput != null) { StringBuilder b = new StringBuilder(); for (int i = 0; i < theInput.length(); i++) { char next = theInput.charAt(i); if (next == theDelimiter) { if (i == 0) { b.append(next); } else { char prevChar = theInput.charAt(i - 1); if (prevChar == '\\') { b.append(next); } else { if (b.length() > 0) { retVal.add(b.toString()); b.setLength(0); } } } } else { b.append(next); } } if (b.length() > 0) { retVal.add(b.toString()); } } if (theUnescapeComponents) { for (int i = 0; i < retVal.size(); i++) { retVal.set(i, unescape(retVal.get(i))); } } return retVal; } /** * Escapes a string according to the rules for parameter escaping specified in the <a href="http://www.hl7.org/implement/standards/fhir/search.html#escaping">FHIR Specification Escaping * Section</a> */ public static String escapeWithDefault(Object theValue) { if (theValue == null) { return ""; } else { return escape(theValue.toString()); } } /** * Escapes a string according to the rules for parameter escaping specified in the <a href="http://www.hl7.org/implement/standards/fhir/search.html#escaping">FHIR Specification Escaping * Section</a> */ public static String escape(String theValue) { if (theValue == null) { return null; } StringBuilder b = new StringBuilder(); for (int i = 0; i < theValue.length(); i++) { char next = theValue.charAt(i); switch (next) { case '$': case ',': case '|': case '\\': b.append('\\'); break; default: break; } b.append(next); } return b.toString(); } /** * Escapes a string according to the rules for parameter escaping specified in the <a href="http://www.hl7.org/implement/standards/fhir/search.html#escaping">FHIR Specification Escaping * Section</a> */ public static String escapeAndUrlEncode(String theValue) { if (theValue == null) { return null; } String escaped = escape(theValue); return UrlUtil.escape(escaped); } /** * Unescapes a string according to the rules for parameter escaping specified in the <a href="http://www.hl7.org/implement/standards/fhir/search.html#escaping">FHIR Specification Escaping * Section</a> */ public static String unescape(String theValue) { if (theValue == null) { return theValue; } if (theValue.indexOf('\\') == -1) { return theValue; } StringBuilder b = new StringBuilder(); for (int i = 0; i < theValue.length(); i++) { char next = theValue.charAt(i); if (next == '\\') { if (i == theValue.length() - 1) { b.append(next); } else { switch (theValue.charAt(i + 1)) { case '$': case ',': case '|': case '\\': continue; default: b.append(next); } } } else { b.append(next); } } return b.toString(); } }