/*
* Copyright (C) 2010 Google Inc.
*
* 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.google.greaze.rest.client;
import java.lang.reflect.Type;
import com.google.greaze.definition.CallPath;
import com.google.greaze.definition.HeaderMap;
import com.google.greaze.definition.HttpMethod;
import com.google.greaze.definition.UrlParams;
import com.google.greaze.definition.UrlParamsSpec;
import com.google.greaze.definition.rest.ResourceDepotBase;
import com.google.greaze.definition.rest.ResourceId;
import com.google.greaze.definition.rest.RestCallSpec;
import com.google.greaze.definition.rest.RestCallSpec.Builder;
import com.google.greaze.definition.rest.IdGsonTypeAdapterFactory;
import com.google.greaze.definition.rest.RestRequestBase;
import com.google.greaze.definition.rest.RestRequestSpec;
import com.google.greaze.definition.rest.RestResourceBase;
import com.google.greaze.definition.rest.RestResponseBase;
import com.google.greaze.definition.rest.WebContext;
import com.google.greaze.definition.rest.WebContextSpec;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
/**
* A client class to access a rest resource
*
* @author Inderjeet Singh
*/
public class ResourceDepotBaseClient<I extends ResourceId, R extends RestResourceBase<I, R>>
implements ResourceDepotBase<I, R> {
private final RestClientStub stub;
private final RestCallSpec callSpec;
private final Type resourceType;
private final Gson gson;
private final boolean inlined;
/**
* @param stub stub containing server info to access the rest client
* @param callPath relative path to the resource
* @param resourceType Class for the resource. Such as Cart.class
* @param inlined set this to true to indicate that the request and response headers should be
* sent in the body itself.
*/
public ResourceDepotBaseClient(RestClientStub stub, CallPath callPath,
Type resourceType, WebContextSpec webContextSpec, GsonBuilder gsonBuilder, boolean inlined) {
this(stub, resourceType, generateRestCallSpec(callPath, resourceType, webContextSpec),
gsonBuilder, inlined);
}
protected ResourceDepotBaseClient(RestClientStub stub, Type resourceType,
RestCallSpec callSpec, GsonBuilder gsonBuilder, boolean inlined) {
this.stub = stub;
this.callSpec = callSpec;
this.resourceType = resourceType;
this.gson = callSpec.addTypeAdapters(gsonBuilder)
.registerTypeAdapterFactory(new IdGsonTypeAdapterFactory())
.create();
this.inlined = inlined;
}
public static RestCallSpec generateRestCallSpec(
CallPath callPath, Type resourceType, WebContextSpec webContextSpec) {
Builder builder = new RestCallSpec.Builder(callPath, resourceType)
.setWebContextSpec(webContextSpec);
if (callPath.hasVersion()) {
builder.setVersion(callPath.getVersion());
}
return builder.build();
}
@Override
public R get(I resourceId, WebContext context) {
RestRequestSpec requestSpec = callSpec.getRequestSpec();
HeaderMap.Builder requestHeadersBuilder = new HeaderMap.Builder(requestSpec.getHeadersSpec());
if (context != null) {
context.populate(requestHeadersBuilder);
}
HeaderMap requestHeaders = requestHeadersBuilder.build();
UrlParamsSpec urlParamsSpec = callSpec.getRequestSpec().getUrlParamsSpec();
UrlParams urlParams = new UrlParams.Builder(urlParamsSpec).build();
RestRequestBase<I, R> request = new RestRequestBase<I, R>(
HttpMethod.GET, requestHeaders, urlParams, resourceId, null, resourceType, inlined);
RestResponseBase<I, R> response = stub.getResponse(callSpec, request, gson);
return response.getResource();
}
@Override
public R post(R resource, WebContext context) {
RestRequestSpec requestSpec = callSpec.getRequestSpec();
HeaderMap.Builder requestHeadersBuilder = new HeaderMap.Builder(requestSpec.getHeadersSpec());
if (context != null) {
context.populate(requestHeadersBuilder);
}
HeaderMap requestHeaders = requestHeadersBuilder.build();
UrlParamsSpec urlParamsSpec = callSpec.getRequestSpec().getUrlParamsSpec();
UrlParams urlParams = new UrlParams.Builder(urlParamsSpec).build();
RestRequestBase<I, R> request = new RestRequestBase<I, R>(
HttpMethod.POST, requestHeaders, urlParams, resource.getId(), resource, resourceType, inlined);
RestResponseBase<I, R> response = stub.getResponse(callSpec, request, gson);
return response.getResource();
}
@Override
public R put(R resource, WebContext context) {
RestRequestSpec requestSpec = callSpec.getRequestSpec();
HeaderMap.Builder requestHeadersBuilder = new HeaderMap.Builder(requestSpec.getHeadersSpec());
if (context != null) {
context.populate(requestHeadersBuilder);
}
HeaderMap requestHeaders = requestHeadersBuilder.build();
UrlParamsSpec urlParamsSpec = callSpec.getRequestSpec().getUrlParamsSpec();
UrlParams urlParams = new UrlParams.Builder(urlParamsSpec).build();
RestRequestBase<I, R> request = new RestRequestBase<I, R>(
HttpMethod.PUT, requestHeaders, urlParams, resource.getId(), resource, resourceType, inlined);
RestResponseBase<I, R> response = stub.getResponse(callSpec, request, gson);
return response.getResource();
}
@Override
public void delete(I resourceId, WebContext context) {
RestRequestSpec requestSpec = callSpec.getRequestSpec();
HeaderMap.Builder requestHeadersBuilder = new HeaderMap.Builder(requestSpec.getHeadersSpec());
if (context != null) {
context.populate(requestHeadersBuilder);
}
HeaderMap requestHeaders = requestHeadersBuilder.build();
UrlParamsSpec urlParamsSpec = callSpec.getRequestSpec().getUrlParamsSpec();
UrlParams urlParams = new UrlParams.Builder(urlParamsSpec).build();
RestRequestBase<I, R> request = new RestRequestBase<I, R>(
HttpMethod.DELETE, requestHeaders, urlParams, resourceId, null, resourceType, inlined);
stub.getResponse(callSpec, request, gson);
}
}