Add custom ResultHander for multi-table

- For now instead of trying to handle this centrally
  in spring-shell add quick fix via custom handler.
- Relates #4795

Author: jvalkeal

spring-cloud-dataflow-shell-core/src/main/java/org/springframework/cloud/dataflow/shell/config/ShellAutoConfiguration.java

@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.dataflow.shell.config;
 
+import org.jline.terminal.Terminal;
+
 import org.springframework.boot.ApplicationRunner;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -56,6 +58,11 @@ public RestTemplate restTemplate() {
 		return DataFlowTemplate.getDefaultDataflowRestTemplate();
 	}
 
+	@Bean
+	public TablesResultHandler tablesResultHandler(Terminal terminal) {
+		return new TablesResultHandler(terminal);
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	static class ShellRunnerConfiguration {
 

spring-cloud-dataflow-shell-core/src/main/java/org/springframework/cloud/dataflow/shell/config/TablesResultHandler.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2022 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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.springframework.cloud.dataflow.shell.config;
+
+import java.util.List;
+
+import org.jline.terminal.Terminal;
+
+import org.springframework.shell.result.TerminalAwareResultHandler;
+import org.springframework.shell.table.Table;
+
+/**
+ * Result handler which output's multiple tables.
+ *
+ * @author Janne Valkealahti
+ */
+public class TablesResultHandler extends TerminalAwareResultHandler<List<Table>> {
+
+	public TablesResultHandler(Terminal terminal) {
+		super(terminal);
+	}
+
+	@Override
+	protected void doHandleResult(List<Table> tables) {
+		for (Table table : tables) {
+			terminal.writer().println(table.render(terminal.getWidth()));
+		}
+	}
+}