org.springframework.social.google.api.impl.AbstractGoogleApiOperations.java Source code

Introduction

Here is the source code for org.springframework.social.google.api.impl.AbstractGoogleApiOperations.java

Source

/*
 * Copyright 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.social.google.api.impl;

import static org.springframework.http.HttpMethod.*;
import static org.springframework.util.StringUtils.hasText;

import java.io.IOException;
import java.nio.charset.Charset;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.social.MissingAuthorizationException;
import org.springframework.social.google.api.ApiEntity;
import org.springframework.util.StreamUtils;
import org.springframework.web.client.DefaultResponseErrorHandler;
import org.springframework.web.client.RestTemplate;

/**
 * Abstract superclass for implementations that work with Google+ APIs.
 * @author Gabriel Axel
 */
public abstract class AbstractGoogleApiOperations {

    protected final RestTemplate restTemplate;
    protected final boolean isAuthorized;
    private final static Log logger = LogFactory.getLog(AbstractGoogleApiOperations.class);

    protected AbstractGoogleApiOperations(RestTemplate restTemplate, boolean isAuthorized) {
        this.restTemplate = restTemplate;
        this.isAuthorized = isAuthorized;

        restTemplate.setErrorHandler(new DefaultResponseErrorHandler() {
            @Override
            public void handleError(ClientHttpResponse response) throws IOException {
                if (logger.isWarnEnabled()) {
                    String bodyText = StreamUtils.copyToString(response.getBody(), Charset.defaultCharset());
                    logger.warn("Google API REST response body:" + bodyText);
                }
            }
        });
    }

    protected void requireAuthorization() {
        if (!isAuthorized) {
            throw new MissingAuthorizationException("google");
        }
    }

    protected <T> T getEntity(String url, Class<T> type) {
        return restTemplate.getForObject(url, type);
    }

    @SuppressWarnings("unchecked")
    protected <T> T saveEntity(String url, T entity) {
        return (T) restTemplate.postForObject(url, entity, entity.getClass());
    }

    protected <T extends ApiEntity> T saveEntity(String baseUrl, T entity) {

        String url;
        HttpMethod method;

        if (hasText(entity.getId())) {
            url = baseUrl + '/' + entity.getId();
            method = PUT;
        } else {
            url = baseUrl;
            method = POST;
        }

        @SuppressWarnings("unchecked")
        ResponseEntity<T> response = restTemplate.exchange(url, method, new HttpEntity<T>(entity),
                (Class<T>) entity.getClass());

        return response.getBody();
    }

    protected void deleteEntity(String baseUrl, ApiEntity entity) {
        deleteEntity(baseUrl, entity.getId());
    }

    protected void deleteEntity(String baseUrl, String id) {
        restTemplate.delete(baseUrl + '/' + id);
    }

    protected <T> T patch(String url, Object request, Class<T> responseType) {
        ResponseEntity<T> response = restTemplate.exchange(url, PATCH, new HttpEntity<Object>(request),
                responseType);
        return response.getBody();
    }
}