Port to java 17

[ccsdk/apps.git] / cadi / core / src / main / java / org / onap / ccsdk / apps / cadi / util / JsonOutputStream.java

diff --git a/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/util/JsonOutputStream.java b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/util/JsonOutputStream.java
new file mode 100644 (file)
index 0000000..933877d
--- /dev/null
+++ b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/util/JsonOutputStream.java
@@ -0,0 +1,89 @@
+/**
+ * ============LICENSE_START====================================================
+ * org.onap.ccsdk
+ * ===========================================================================
+ * Copyright (c) 2023 AT&T Intellectual Property. All rights reserved.
+ * ===========================================================================
+ * 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
+ *
+ *      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.
+ * ============LICENSE_END====================================================
+ *
+ */
+
+package org.onap.ccsdk.apps.cadi.util;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+public class JsonOutputStream extends OutputStream {
+    private static final byte[] TWO_SPACE = "  ".getBytes();
+    private OutputStream os;
+    private boolean closeable;
+    private int indent = 0;
+    private int prev,ret=0;
+
+    public JsonOutputStream(OutputStream os) {
+        // Don't close these, or dire consequences.
+        closeable = !os.equals(System.out) && !os.equals(System.err);
+        this.os = os;
+    }
+
+    @Override
+    public void write(int b) throws IOException {
+        if (ret=='\n') {
+            ret = 0;
+            if (prev!=',' || (b!='{' && b!='[')) {
+                os.write('\n');
+                for (int i=0;i<indent;++i) {
+                    os.write(TWO_SPACE);
+                }
+            }
+        }
+        switch(b) {
+            case '{':
+            case '[':
+                    ret = '\n';
+                    ++indent;
+                    break;
+            case '}':
+            case ']':
+                    --indent;
+                    os.write('\n');
+                    for (int i=0;i<indent;++i) {
+                        os.write(TWO_SPACE);
+                    }
+                    break;
+            case ',':
+                    ret = '\n';
+                    break;
+
+        }
+        os.write(b);
+        prev = b;
+    }
+    public void resetIndent() {
+        indent = 1;
+    }
+
+    @Override
+    public void flush() throws IOException {
+        os.flush();
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (closeable) {
+            os.close();
+        }
+    }
+
+}