Java tutorial
/* * 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 com.addthis.codec.jackson; import java.util.Collection; import com.fasterxml.jackson.core.JsonLocation; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.databind.exc.PropertyBindingException; public class MissingPropertyException extends PropertyBindingException { public MissingPropertyException(String msg, JsonLocation loc, Class<?> referringClass, String propName, Collection<Object> propertyIds) { super(msg, loc, referringClass, propName, propertyIds); } public static MissingPropertyException from(JsonParser jp, Object fromObjectOrClass, String propertyName, Collection<Object> propertyIds) { if (fromObjectOrClass == null) { throw new IllegalArgumentException(); } Class<?> ref; if (fromObjectOrClass instanceof Class<?>) { ref = (Class<?>) fromObjectOrClass; } else { ref = fromObjectOrClass.getClass(); } String msg = "Missing field \"" + propertyName + "\" (class " + ref.getName() + "), marked as required"; MissingPropertyException e = new MissingPropertyException(msg, jp.getCurrentLocation(), ref, propertyName, propertyIds); // but let's also ensure path includes this last (missing) segment e.prependPath(fromObjectOrClass, propertyName); return e; } }