org.npr.api.Client.java Source code

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Here is the source code for org.npr.api.Client.java

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// Copyright 2009 Google Inc.
// Copyright 2011 NPR
//
// 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.npr.api;

import android.util.Log;

import org.apache.http.client.ClientProtocolException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import java.io.IOException;
import java.io.InputStream;

public class Client {
    private static final String LOG_TAG = Client.class.getName();
    private final String url;

    public Client(String url) {
        this.url = url;
    }

    public Node execute() throws ClientProtocolException, IOException, SAXException, ParserConfigurationException {
        InputStream data = download();

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setValidating(false);
        dbf.setNamespaceAware(false);

        if (data != null) {
            Document document = dbf.newDocumentBuilder().parse(data);
            return document.getDocumentElement();
        }
        return null;
    }

    public void sax(ContentHandler handler) {
        try {
            XMLReader xr = SAXParserFactory.newInstance().newSAXParser().getXMLReader();
            xr.setContentHandler(handler);
            xr.parse(new InputSource(download()));
        } catch (SAXException e) {
            Log.e(LOG_TAG, "error creating parser", e);
        } catch (ParserConfigurationException e) {
            Log.e(LOG_TAG, "error creating parser", e);
        } catch (FactoryConfigurationError e) {
            Log.e(LOG_TAG, "error creating parser", e);
        } catch (IOException e) {
            Log.e(LOG_TAG, "error parsing", e);
        }
    }

    protected InputStream download() throws IOException {
        return HttpHelper.download(url);
    }

}