org.springframework.security.oauth2.common.exceptions.OAuth2ExceptionJackson2Deserializer.java Source code

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Here is the source code for org.springframework.security.oauth2.common.exceptions.OAuth2ExceptionJackson2Deserializer.java

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/*
 * Copyright 2006-2011 the original author or authors.
 * 
 * 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 org.springframework.security.oauth2.common.exceptions;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.springframework.security.oauth2.common.util.OAuth2Utils;

/**
 * @author Brian Clozel
 * 
 */
@SuppressWarnings("serial")
public class OAuth2ExceptionJackson2Deserializer extends StdDeserializer<OAuth2Exception> {

    public OAuth2ExceptionJackson2Deserializer() {
        super(OAuth2Exception.class);
    }

    @Override
    public OAuth2Exception deserialize(JsonParser jp, DeserializationContext ctxt)
            throws IOException, JsonProcessingException {

        JsonToken t = jp.getCurrentToken();
        if (t == JsonToken.START_OBJECT) {
            t = jp.nextToken();
        }
        Map<String, Object> errorParams = new HashMap<String, Object>();
        for (; t == JsonToken.FIELD_NAME; t = jp.nextToken()) {
            // Must point to field name
            String fieldName = jp.getCurrentName();
            // And then the value...
            t = jp.nextToken();
            // Note: must handle null explicitly here; value deserializers won't
            Object value;
            if (t == JsonToken.VALUE_NULL) {
                value = null;
            }
            // Some servers might send back complex content
            else if (t == JsonToken.START_ARRAY) {
                value = jp.readValueAs(List.class);
            } else if (t == JsonToken.START_OBJECT) {
                value = jp.readValueAs(Map.class);
            } else {
                value = jp.getText();
            }
            errorParams.put(fieldName, value);
        }

        Object errorCode = errorParams.get("error");
        String errorMessage = errorParams.containsKey("error_description")
                ? errorParams.get("error_description").toString()
                : null;
        if (errorMessage == null) {
            errorMessage = errorCode == null ? "OAuth Error" : errorCode.toString();
        }

        OAuth2Exception ex;
        if ("invalid_client".equals(errorCode)) {
            ex = new InvalidClientException(errorMessage);
        } else if ("unauthorized_client".equals(errorCode)) {
            ex = new UnauthorizedUserException(errorMessage);
        } else if ("invalid_grant".equals(errorCode)) {
            if (errorMessage.toLowerCase().contains("redirect") && errorMessage.toLowerCase().contains("match")) {
                ex = new RedirectMismatchException(errorMessage);
            } else {
                ex = new InvalidGrantException(errorMessage);
            }
        } else if ("invalid_scope".equals(errorCode)) {
            ex = new InvalidScopeException(errorMessage);
        } else if ("invalid_token".equals(errorCode)) {
            ex = new InvalidTokenException(errorMessage);
        } else if ("invalid_request".equals(errorCode)) {
            ex = new InvalidRequestException(errorMessage);
        } else if ("redirect_uri_mismatch".equals(errorCode)) {
            ex = new RedirectMismatchException(errorMessage);
        } else if ("unsupported_grant_type".equals(errorCode)) {
            ex = new UnsupportedGrantTypeException(errorMessage);
        } else if ("unsupported_response_type".equals(errorCode)) {
            ex = new UnsupportedResponseTypeException(errorMessage);
        } else if ("insufficient_scope".equals(errorCode)) {
            ex = new InsufficientScopeException(errorMessage,
                    OAuth2Utils.parseParameterList((String) errorParams.get("scope")));
        } else if ("access_denied".equals(errorCode)) {
            ex = new UserDeniedAuthorizationException(errorMessage);
        } else {
            ex = new OAuth2Exception(errorMessage);
        }

        Set<Map.Entry<String, Object>> entries = errorParams.entrySet();
        for (Map.Entry<String, Object> entry : entries) {
            String key = entry.getKey();
            if (!"error".equals(key) && !"error_description".equals(key)) {
                Object value = entry.getValue();
                ex.addAdditionalInformation(key, value == null ? null : value.toString());
            }
        }

        return ex;

    }

}