restconf/restconf-openapi/src/main/java/org/opendaylight/restconf/openapi/impl/SecuritySchemesStream.java

   1 /*
   2  * Copyright (c) 2023 PANTHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.restconf.openapi.impl;
   9
  10 import java.io.BufferedReader;
  11 import java.io.ByteArrayInputStream;
  12 import java.io.IOException;
  13 import java.io.InputStream;
  14 import java.io.InputStreamReader;
  15 import java.io.Reader;
  16 import java.nio.charset.StandardCharsets;
  17 import java.util.Map;
  18 import org.opendaylight.restconf.openapi.jaxrs.OpenApiBodyWriter;
  19 import org.opendaylight.restconf.openapi.model.OpenApiEntity;
  20 import org.opendaylight.restconf.openapi.model.SecuritySchemesEntity;
  21 import org.opendaylight.restconf.openapi.model.security.SecuritySchemeObject;
  22
  23 public final class SecuritySchemesStream extends InputStream {
  24     private final OpenApiBodyWriter writer;
  25     private final SecuritySchemesEntity securitySchemesEntity;
  26
  27     private Reader reader;
  28
  29     public SecuritySchemesStream(final OpenApiBodyWriter writer,
  30             final Map<String, SecuritySchemeObject> securitySchemes) {
  31         this.writer = writer;
  32         this.securitySchemesEntity = new SecuritySchemesEntity(securitySchemes);
  33     }
  34
  35     @Override
  36     public int read() throws IOException {
  37         if (reader == null) {
  38             reader = new BufferedReader(
  39                 new InputStreamReader(new ByteArrayInputStream(writeNextEntity(securitySchemesEntity)),
  40                     StandardCharsets.UTF_8));
  41         }
  42         return reader.read();
  43     }
  44
  45     @Override
  46     public int read(final byte[] array, final int off, final int len) throws IOException {
  47         return super.read(array, off, len);
  48     }
  49
  50     private byte[] writeNextEntity(final OpenApiEntity next) throws IOException {
  51         writer.writeTo(next, null, null, null, null, null, null);
  52         return writer.readFrom();
  53     }
  54 }