| /* |
| * 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.sling.nosql.generic.resource.impl; |
| |
| import java.text.DateFormat; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import javax.xml.bind.DatatypeConverter; |
| |
| import org.apache.sling.api.resource.LoginException; |
| import org.apache.sling.nosql.generic.adapter.NoSqlAdapter; |
| import org.apache.sling.nosql.generic.adapter.NoSqlData; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Special adapter wrapper that converts all Calendar and byte[] values in ValueMap to String values |
| * when passing to the underlying NoSql adapter and back to typed values when reading from it. |
| * This is required because too many implementations access ValueMap without type specifier so |
| * we cannot only rely on the type conversion in the typed get methods of a ValueMap. |
| */ |
| class ValueMapConvertingNoSqlAdapter implements NoSqlAdapter { |
| |
| private static final String PREFIX_CALENDAR = "{{calendar}}"; |
| private static final String PREFIX_BYTE_ARRAY = "{{bytes}}"; |
| |
| private final NoSqlAdapter delegate; |
| |
| private static final Logger log = LoggerFactory.getLogger(ValueMapConvertingNoSqlAdapter.class); |
| |
| public ValueMapConvertingNoSqlAdapter(NoSqlAdapter delegate) { |
| this.delegate = delegate; |
| } |
| |
| public boolean validPath(String path) { |
| return delegate.validPath(path); |
| } |
| |
| public NoSqlData get(String path) { |
| return deserializeUnsupportedTypes(delegate.get(path)); |
| } |
| |
| public Iterator<NoSqlData> getChildren(String parentPath) { |
| return deserializeUnsupportedTypes(delegate.getChildren(parentPath)); |
| } |
| |
| public boolean store(NoSqlData data) { |
| return delegate.store(serializeUnsupportedTypes(data)); |
| } |
| |
| public boolean deleteRecursive(String path) { |
| return delegate.deleteRecursive(path); |
| } |
| |
| public Iterator<NoSqlData> query(String query, String language) { |
| return deserializeUnsupportedTypes(delegate.query(query, language)); |
| } |
| |
| private Iterator<NoSqlData> deserializeUnsupportedTypes(final Iterator<NoSqlData> source) { |
| if (source == null) { |
| return null; |
| } |
| return new Iterator<NoSqlData>() { |
| @Override |
| public boolean hasNext() { |
| return source.hasNext(); |
| } |
| @Override |
| public NoSqlData next() { |
| return deserializeUnsupportedTypes(source.next()); |
| } |
| @Override |
| public void remove() { |
| source.remove(); |
| } |
| }; |
| } |
| |
| private NoSqlData serializeUnsupportedTypes(NoSqlData data) { |
| if (data == null) { |
| return null; |
| } |
| |
| Map<String,Object> serializedMap = new HashMap<String, Object>(); |
| |
| for (Map.Entry<String, Object> entry : data.getProperties().entrySet()) { |
| Object serializedValue = entry.getValue(); |
| |
| // Calendar.class |
| if (entry.getValue() instanceof Calendar) { |
| serializedValue = PREFIX_CALENDAR + getISO8601Format().format(((Calendar)entry.getValue()).getTime()); |
| } |
| |
| // byte[].class |
| else if (entry.getValue() instanceof byte[]) { |
| serializedValue = PREFIX_BYTE_ARRAY + DatatypeConverter.printBase64Binary((byte[])entry.getValue()); |
| } |
| |
| serializedMap.put(entry.getKey(), serializedValue); |
| } |
| |
| return new NoSqlData(data.getPath(), serializedMap); |
| } |
| |
| private NoSqlData deserializeUnsupportedTypes(NoSqlData data) { |
| if (data == null) { |
| return null; |
| } |
| |
| Map<String,Object> deserializedMap = new HashMap<String, Object>(); |
| |
| for (Map.Entry<String, Object> entry : data.getProperties().entrySet()) { |
| Object deserializedValue = entry.getValue(); |
| if (entry.getValue() instanceof String) { |
| String value = (String)entry.getValue(); |
| |
| // Calendar.class |
| if (value.indexOf(PREFIX_CALENDAR) == 0) { |
| String calendarValue = value.substring(PREFIX_CALENDAR.length()); |
| try { |
| Date date = getISO8601Format().parse((String)calendarValue); |
| Calendar calendar = Calendar.getInstance(); |
| calendar.setTime(date); |
| deserializedValue = calendar; |
| } |
| catch (ParseException ex) { |
| log.warn("Unable to parse serialized calendar value: " + entry.getValue(), ex); |
| } |
| } |
| |
| // byte[].class |
| else if (value.indexOf(PREFIX_BYTE_ARRAY) == 0) { |
| String byteArrayValue = value.substring(PREFIX_BYTE_ARRAY.length()); |
| deserializedValue = DatatypeConverter.parseBase64Binary(byteArrayValue); |
| } |
| |
| } |
| deserializedMap.put(entry.getKey(), deserializedValue); |
| } |
| |
| return new NoSqlData(data.getPath(), deserializedMap); |
| } |
| |
| @Override |
| public void checkConnection() throws LoginException { |
| delegate.checkConnection(); |
| } |
| |
| @Override |
| public void createIndexDefinitions() { |
| delegate.createIndexDefinitions(); |
| } |
| |
| private static DateFormat getISO8601Format() { |
| return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ", Locale.US); |
| } |
| |
| } |