| /* |
| * 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.solr.handler.dataimport; |
| |
| import org.apache.solr.core.SolrCore; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * <p> |
| * This abstract class gives access to all available objects. So any |
| * component implemented by a user can have the full power of DataImportHandler |
| * </p> |
| * <p> |
| * Refer to <a |
| * href="http://wiki.apache.org/solr/DataImportHandler">http://wiki.apache.org/solr/DataImportHandler</a> |
| * for more details. |
| * </p> |
| * <p> |
| * <b>This API is experimental and subject to change</b> |
| * |
| * @since solr 1.3 |
| */ |
| public abstract class Context { |
| public static final String FULL_DUMP = "FULL_DUMP", DELTA_DUMP = "DELTA_DUMP", FIND_DELTA = "FIND_DELTA"; |
| |
| /** |
| * An object stored in entity scope is valid only for the current entity for the current document only. |
| */ |
| public static final String SCOPE_ENTITY = "entity"; |
| |
| /** |
| * An object stored in global scope is available for the current import only but across entities and documents. |
| */ |
| public static final String SCOPE_GLOBAL = "global"; |
| |
| /** |
| * An object stored in document scope is available for the current document only but across entities. |
| */ |
| public static final String SCOPE_DOC = "document"; |
| |
| /** |
| * An object stored in 'solrcore' scope is available across imports, entities and documents throughout the life of |
| * a solr core. A solr core unload or reload will destroy this data. |
| */ |
| public static final String SCOPE_SOLR_CORE = "solrcore"; |
| |
| /** |
| * Get the value of any attribute put into this entity |
| * |
| * @param name name of the attribute eg: 'name' |
| * @return value of named attribute in entity |
| */ |
| public abstract String getEntityAttribute(String name); |
| |
| /** |
| * Get the value of any attribute put into this entity after resolving all variables found in the attribute value |
| * @param name name of the attribute |
| * @return value of the named attribute after resolving all variables |
| */ |
| public abstract String getResolvedEntityAttribute(String name); |
| |
| /** |
| * Returns all the fields put into an entity. each item (which is a map ) in |
| * the list corresponds to one field. each if the map contains the attribute |
| * names and values in a field |
| * |
| * @return all fields in an entity |
| */ |
| public abstract List<Map<String, String>> getAllEntityFields(); |
| |
| /** |
| * Returns the VariableResolver used in this entity which can be used to |
| * resolve the tokens in ${<namespce.name>} |
| * |
| * @return a VariableResolver instance |
| * @see org.apache.solr.handler.dataimport.VariableResolver |
| */ |
| |
| public abstract VariableResolver getVariableResolver(); |
| |
| /** |
| * Gets the datasource instance defined for this entity. Do not close() this instance. |
| * Transformers should use the getDataSource(String name) method. |
| * |
| * @return a new DataSource instance as configured for the current entity |
| * @see org.apache.solr.handler.dataimport.DataSource |
| * @see #getDataSource(String) |
| */ |
| @SuppressWarnings({"rawtypes"}) |
| public abstract DataSource getDataSource(); |
| |
| /** |
| * Gets a new DataSource instance with a name. Ensure that you close() this after use |
| * because this is created just for this method call. |
| * |
| * @param name Name of the dataSource as defined in the dataSource tag |
| * @return a new DataSource instance |
| * @see org.apache.solr.handler.dataimport.DataSource |
| */ |
| @SuppressWarnings({"rawtypes"}) |
| public abstract DataSource getDataSource(String name); |
| |
| /** |
| * Returns the instance of EntityProcessor used for this entity |
| * |
| * @return instance of EntityProcessor used for the current entity |
| * @see org.apache.solr.handler.dataimport.EntityProcessor |
| */ |
| public abstract EntityProcessor getEntityProcessor(); |
| |
| /** |
| * Store values in a certain name and scope (entity, document,global) |
| * |
| * @param name the key |
| * @param val the value |
| * @param scope the scope in which the given key, value pair is to be stored |
| */ |
| public abstract void setSessionAttribute(String name, Object val, String scope); |
| |
| /** |
| * get a value by name in the given scope (entity, document,global) |
| * |
| * @param name the key |
| * @param scope the scope from which the value is to be retrieved |
| * @return the object stored in the given scope with the given key |
| */ |
| public abstract Object getSessionAttribute(String name, String scope); |
| |
| /** |
| * Get the context instance for the parent entity. works only in the full dump |
| * If the current entity is rootmost a null is returned |
| * |
| * @return parent entity's Context |
| */ |
| public abstract Context getParentContext(); |
| |
| /** |
| * The request parameters passed over HTTP for this command the values in the |
| * map are either String(for single valued parameters) or List<String> (for |
| * multi-valued parameters) |
| * |
| * @return the request parameters passed in the URL to initiate this process |
| */ |
| public abstract Map<String, Object> getRequestParameters(); |
| |
| /** |
| * Returns if the current entity is the root entity |
| * |
| * @return true if current entity is the root entity, false otherwise |
| */ |
| public abstract boolean isRootEntity(); |
| |
| /** |
| * Returns the current process FULL_DUMP, DELTA_DUMP, FIND_DELTA |
| * |
| * @return the type of the current running process |
| */ |
| public abstract String currentProcess(); |
| |
| /** |
| * Exposing the actual SolrCore to the components |
| * |
| * @return the core |
| */ |
| public abstract SolrCore getSolrCore(); |
| |
| /** |
| * Makes available some basic running statistics such as "docCount", |
| * "deletedDocCount", "rowCount", "queryCount" and "skipDocCount" |
| * |
| * @return a Map containing running statistics of the current import |
| */ |
| public abstract Map<String, Object> getStats(); |
| |
| /** |
| * Returns the text specified in the script tag in the data-config.xml |
| */ |
| public abstract String getScript(); |
| |
| /** |
| * Returns the language of the script as specified in the script tag in data-config.xml |
| */ |
| public abstract String getScriptLanguage(); |
| |
| /**delete a document by id |
| */ |
| public abstract void deleteDoc(String id); |
| |
| /**delete documents by query |
| */ |
| public abstract void deleteDocByQuery(String query); |
| |
| /**Use this directly to resolve variable |
| * @param var the variable name |
| * @return the resolved value |
| */ |
| public abstract Object resolve(String var); |
| |
| /** Resolve variables in a template |
| * |
| * @return The string w/ variables resolved |
| */ |
| public abstract String replaceTokens(String template); |
| |
| } |