Maven Central search results should be cached eclipse#263

Fixes: eclipse#263

lemminx-maven/src/main/java/org/eclipse/lemminx/extensions/maven/searcher/JsonRemoteCentralRepositoryConstants.java

@@ -0,0 +1,86 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Red Hat Inc. and others.
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+package org.eclipse.lemminx.extensions.maven.searcher;
+
+/**
+ * Maven Search API response is set to be of Json format, containing the "response" 
+ * root item, consisting of the following three main items:
+ * 
+ * * numFound - number of items found
+ * * start - number of first item in response: the items can be transfered 
+ * partially, so start indicates a number of item in whole result
+ * * docs - an array of response data items, the format of each data item
+ * depends on the type of request
+ * 
+ * For example: 
+ * 
+ * { 
+ * numFound=125, 
+ * start=0, 
+ * docs=
+ * [
+ * {
+ * "id":"org.fujion:fujion-ckeditor",
+ * "g":"org.fujion",
+ * "a":"fujion-ckeditor",
+ * "latestVersion":"3.1.0",
+ * "repositoryId":"central",
+ * "p":"jar",
+ * "timestamp":1688564431000,
+ * "versionCount":16,
+ * "text":["org.fujion","fujion-ckeditor","-sources.jar",".pom","-javadoc.jar",".jar"],
+ * "ec":["-sources.jar",".pom","-javadoc.jar",".jar"]
+ * },
+ * // ... other 124 data items ...
+ * ]
+ * } 
+ */
+public class JsonRemoteCentralRepositoryConstants {
+ /**
+ * response - root item
+ */
+ public static String RESPONSE = "response";
+
+ /**
+ * numFound - number of items found
+ */
+ public static String NUM_FOUND = "numFound";
+
+ /**
+ * start - number of first item in response: the items can be transfered
+ * partially, so start indicates a number of item in whole result
+ */
+ public static String START = "start";
+
+ /**
+ * docs - an array of response data items, the format of each data item depends
+ * on the type of request
+ */
+ public static String DOCS = "docs";
+
+ /**
+ * Group ID of an artifact
+ */
+ public static final String GROUP_ID = "g";
+
+ /**
+ * Artifact ID of an artifact
+ */
+ public static final String ARTIFACT_ID = "a";
+
+ /**
+ * Version of an artifact
+ */
+ public static final String VERSION = "v";
+
+ /**
+ * The latest available version of an artifact
+ */
+ public static final String LATEST_VERSION = "latestVersion";
+}