| /* |
| * 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 org.apache.oodt.xmlquery; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.zip.GZIPInputStream; |
| import java.util.zip.GZIPOutputStream; |
| import org.apache.oodt.commons.io.Base64DecodingInputStream; |
| import org.apache.oodt.commons.io.Base64EncodingOutputStream; |
| import org.apache.oodt.commons.util.XML; |
| import org.w3c.dom.DOMException; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| /** A result encoder/decoder for compressed strings. |
| * |
| * This codec uses a GZIP compressed string format for objects. |
| * |
| * @author Kelly |
| */ |
| class CompressedStringCodec implements Codec { |
| public Node encode(Object object, Document doc) throws DOMException { |
| ByteArrayOutputStream byteArray = new ByteArrayOutputStream(); |
| try { |
| Base64EncodingOutputStream base64 = new Base64EncodingOutputStream(byteArray); |
| GZIPOutputStream gzip = new GZIPOutputStream(base64); |
| gzip.write(object.toString().getBytes()); |
| gzip.close(); |
| } catch (IOException cantHappen) {} |
| Element value = doc.createElement("resultValue"); |
| value.appendChild(doc.createCDATASection(byteArray.toString())); |
| return value; |
| } |
| |
| public Object decode(Node node) { |
| String encodedValue; |
| if (node.getFirstChild().getNodeType() == Node.CDATA_SECTION_NODE) |
| encodedValue = node.getFirstChild().getNodeValue(); |
| else |
| encodedValue = XML.text(node); |
| String rc = null; |
| try { |
| ByteArrayInputStream byteArray = new ByteArrayInputStream(encodedValue.getBytes()); |
| Base64DecodingInputStream base64 = new Base64DecodingInputStream(byteArray); |
| GZIPInputStream gzip = new GZIPInputStream(base64); |
| StringBuffer b = new StringBuffer(); |
| int numRead; |
| byte[] buf = new byte[1024]; |
| while ((numRead = gzip.read(buf)) != -1) |
| b.append(new String(buf, 0, numRead)); |
| gzip.close(); |
| rc = b.toString(); |
| } catch (IOException cantHappen) {} |
| return rc; |
| } |
| |
| public InputStream getInputStream(Object value) { |
| return new ByteArrayInputStream(((String) value).getBytes()); |
| } |
| |
| public long sizeOf(Object obj) { |
| return ((String) obj).getBytes().length; |
| } |
| } |