001/*
002 * Copyright 2012-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.context.properties.bind.handler;
018
019import org.springframework.boot.context.properties.bind.AbstractBindHandler;
020import org.springframework.boot.context.properties.bind.BindContext;
021import org.springframework.boot.context.properties.bind.BindHandler;
022import org.springframework.boot.context.properties.bind.Bindable;
023import org.springframework.boot.context.properties.source.ConfigurationPropertyName;
024import org.springframework.core.convert.ConverterNotFoundException;
025
026/**
027 * {@link BindHandler} that can be used to ignore top-level
028 * {@link ConverterNotFoundException}s.
029 *
030 * @author Madhura Bhave
031 * @since 2.0.1
032 */
033public class IgnoreTopLevelConverterNotFoundBindHandler extends AbstractBindHandler {
034
035        /**
036         * Create a new {@link IgnoreTopLevelConverterNotFoundBindHandler} instance.
037         */
038        public IgnoreTopLevelConverterNotFoundBindHandler() {
039        }
040
041        /**
042         * Create a new {@link IgnoreTopLevelConverterNotFoundBindHandler} instance with a
043         * specific parent.
044         * @param parent the parent handler
045         */
046        public IgnoreTopLevelConverterNotFoundBindHandler(BindHandler parent) {
047        }
048
049        @Override
050        public Object onFailure(ConfigurationPropertyName name, Bindable<?> target,
051                        BindContext context, Exception error) throws Exception {
052                if (context.getDepth() == 0 && error instanceof ConverterNotFoundException) {
053                        return null;
054                }
055                throw error;
056        }
057
058}