org.palaso.languageforge.client.lex.jsonrpc.JsonRpcAction.java Source code

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Here is the source code for org.palaso.languageforge.client.lex.jsonrpc.JsonRpcAction.java

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/**
 * Copyright (C) 2010 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.palaso.languageforge.client.lex.jsonrpc;

import org.palaso.languageforge.client.lex.common.Constants;
import org.palaso.languageforge.client.lex.model.CurrentEnvironmentDto;

import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestBuilder.Method;
import com.google.gwt.user.client.Window;

/**
 * Action definition for command pattern.
 * 
 * @author <a href="mailto:mail@raphaelbauer.com">rEyez</<a>
 * 
 * @param <R>
 *            The result. <A> The object to send while requesting => can be ""
 */

public abstract class JsonRpcAction<R> implements Action<R> {

    private String _method;
    private String _service;
    private String _servicePath;
    private int _parameterCount;
    private static String HOST_URL = "http://" + Window.Location.getHostName();
    protected boolean isBackgroundRequestRun = false;

    protected JsonRpcAction(String method, int parameterCount) {
        _servicePath = Constants.LEX_API_PATH;
        _service = Constants.LEX_API + "?p=" + CurrentEnvironmentDto.getCurrentProject().getProjectId();
        _method = method;
        _parameterCount = parameterCount;
    }

    @Override
    public boolean isBackgroundRequest() {
        return isBackgroundRequestRun;
    }

    @Override
    public Method getHTTPMethod() {
        return RequestBuilder.POST;
    }

    @Override
    public String getService() {
        return _service;
    }

    @Override
    public String getFullServiceUrl() {

        if (!_servicePath.endsWith("/")) {
            return HOST_URL + _servicePath + "/" + _service;
        }
        return HOST_URL + _servicePath + _service;
    }

    @Override
    public String getServiceMethod() {
        return _method;
    }

    @Override
    public String encodeRequest() {
        return "";
    }

    @Override
    public int getParamCount() {
        return _parameterCount;
    }

    @Override
    public String encodeParam(int i) {
        return null;
    }

    @Override
    public JsonRpcResponseImpl<R> decodeResponse(String json) {
        JsonRpcResponseImpl<R> jsonRpcResponseImpl = new JsonRpcResponseImpl<R>(json);
        return jsonRpcResponseImpl;
    }

    @Override
    public RequestModel getRequestModel(int requestId) {
        RequestModel requestModel = RequestModel.getNew();
        requestModel.setMethod(getServiceMethod());
        for (int i = 0, n = getParamCount(); i < n; ++i) {
            requestModel.addParameter(encodeParam(i));
        }
        requestModel.setId(requestId);
        return requestModel;
    }

    @Override
    public String getRequestModelAsJsonString(int requestId) {
        return RequestModel.encode(getRequestModel(requestId));
    }
}