71 lines
2.3 KiB
Java
71 lines
2.3 KiB
Java
/*
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* Copyright (C) 2008 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mcteam.factions.gson;
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import java.lang.reflect.Type;
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/**
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* Decorators a {@code JsonDeserializer} instance with exception handling. This wrapper class
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* ensures that a {@code JsonDeserializer} will not propagate any exception other than a
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* {@link JsonParseException}.
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*
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* @param <T> type of the deserializer being wrapped.
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*
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* @author Inderjeet Singh
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* @author Joel Leitch
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*/
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class JsonDeserializerExceptionWrapper<T> implements JsonDeserializer<T> {
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private final JsonDeserializer<T> delegate;
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/**
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* Returns a wrapped {@link JsonDeserializer} object that has been decorated with
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* {@link JsonParseException} handling.
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*
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* @param delegate the {@code JsonDeserializer} instance to be wrapped.
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* @throws IllegalArgumentException if {@code delegate} is {@code null}.
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*/
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JsonDeserializerExceptionWrapper(JsonDeserializer<T> delegate) {
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Preconditions.checkNotNull(delegate);
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this.delegate = delegate;
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}
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public T deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
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throws JsonParseException {
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try {
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return delegate.deserialize(json, typeOfT, context);
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} catch (JsonParseException e) {
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// just rethrow the exception
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throw e;
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} catch (Exception e) {
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// rethrow as a JsonParseException
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StringBuilder errorMsg = new StringBuilder()
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.append("The JsonDeserializer ")
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.append(delegate)
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.append(" failed to deserialized json object ")
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.append(json)
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.append(" given the type ")
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.append(typeOfT);
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throw new JsonParseException(errorMsg.toString(), e);
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}
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}
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@Override
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public String toString() {
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return delegate.toString();
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}
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} |