edu.isi.wings.util.oodt.CurationServiceAPI.java Source code

Introduction

Here is the source code for edu.isi.wings.util.oodt.CurationServiceAPI.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 edu.isi.wings.util.oodt;

import java.io.DataOutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

import org.apache.commons.io.IOUtils;
import org.apache.oodt.cas.filemgr.structs.Element;
import org.apache.oodt.cas.filemgr.structs.ProductType;

import com.google.gson.Gson;

public class CurationServiceAPI {
    String policy;
    String curatorurl;
    Gson gson;
    String service = "/services/metadata/productType/";

    public CurationServiceAPI(String curatorurl, String policy) {
        this.curatorurl = curatorurl;
        this.policy = policy;
        this.gson = new Gson();
    }

    private String query(String method, String op, Object... args) {
        String url = this.curatorurl + this.service + op;
        try {
            String params = "policy=" + URLEncoder.encode(this.policy, "UTF-8");
            for (int i = 0; i < args.length; i += 2) {
                params += "&" + args[i] + "=" + URLEncoder.encode(args[i + 1].toString(), "UTF-8");
            }

            URL urlobj = new URL(url);
            if ("GET".equals(method))
                urlobj = new URL(url + "?" + params);
            HttpURLConnection con = (HttpURLConnection) urlobj.openConnection();
            con.setRequestMethod(method);
            if (!"GET".equals(method)) {
                con.setDoOutput(true);
                DataOutputStream out = new DataOutputStream(con.getOutputStream());
                out.writeBytes(params);
                out.flush();
                out.close();
            }

            String result = IOUtils.toString(con.getInputStream());
            con.disconnect();
            return result;

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public boolean removeProductType(ProductType type) {
        String result = this.query("DELETE", "remove", "id", type.getProductTypeId());
        return Boolean.parseBoolean(result);
    }

    public HashMap<String, String> getParentTypeMap() {
        String result = this.query("GET", "parentmap");
        HashMap<?, ?> map = gson.fromJson(result, HashMap.class);
        HashMap<String, String> ptypeMap = new HashMap<String, String>();
        for (Object key : map.keySet()) {
            ptypeMap.put((String) key, (String) map.get(key));
        }
        return ptypeMap;
    }

    public boolean addParentForProductType(ProductType type, String parentId) {
        String result = this.query("POST", "parent/add", "id", type.getProductTypeId(), "parentId", parentId);
        return Boolean.parseBoolean(result);
    }

    public boolean removeParentForProductType(ProductType type) {
        String result = this.query("DELETE", "parent/remove", "id", type.getProductTypeId());
        return Boolean.parseBoolean(result);
    }

    public boolean addElementsForProductType(ProductType type, List<Element> elementList) {
        String elementIds = "";
        for (Element element : elementList)
            elementIds += (elementIds != "" ? "," : "") + element.getElementId();
        String result = this.query("POST", "elements/add", "id", type.getProductTypeId(), "elementIds", elementIds);
        return Boolean.parseBoolean(result);
    }

    public List<Element> getElementsForProductType(ProductType type, boolean direct) {
        String result = this.query("GET", "elements", "id", type.getProductTypeId(), "direct", direct);
        List<Element> elementList = new ArrayList<Element>();
        Object[] elementIds = gson.fromJson(result, ArrayList.class).toArray();
        for (Object elementId : elementIds) {
            String id = (String) elementId;
            elementList.add(new Element(id, id, "", "", "Automatically Added", ""));
        }
        return elementList;
    }

    public boolean removeAllElementsForProductType(ProductType type) {
        String result = this.query("DELETE", "elements/remove/all", "id", type.getProductTypeId());
        return Boolean.parseBoolean(result);
    }

    public boolean removeElementsForProductType(ProductType type, List<Element> elementList) {
        String elementIds = "";
        for (Element element : elementList)
            elementIds += (elementIds != "" ? "," : "") + element.getElementId();
        String result = this.query("DELETE", "elements/remove", "id", type.getProductTypeId(), "elementIds",
                elementIds);
        return Boolean.parseBoolean(result);
    }

    public List<String> getProductTypeIdsHavingElement(Element el) {
        String result = this.query("GET", "typeswithelement/" + el.getElementId(), "id");
        Object[] typeIds = gson.fromJson(result, ArrayList.class).toArray();
        return Arrays.asList((String[]) typeIds);
    }
}