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author | Mathias <mathias@spray.cc> | 2011-05-06 11:11:37 +0200 |
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committer | Mathias <mathias@spray.cc> | 2011-05-06 11:11:37 +0200 |
commit | 0ce9cf8fce1dc475f3bb2a517e0a7698c9e0a5d9 (patch) | |
tree | 62de608642a30ec478411d27e94179ec64c5bd17 /src/main/scala/cc/spray/json/PrettyPrinter.scala | |
download | spray-json-0ce9cf8fce1dc475f3bb2a517e0a7698c9e0a5d9.tar.gz spray-json-0ce9cf8fce1dc475f3bb2a517e0a7698c9e0a5d9.tar.bz2 spray-json-0ce9cf8fce1dc475f3bb2a517e0a7698c9e0a5d9.zip |
Initial commit (split off from main spray codebase)
Diffstat (limited to 'src/main/scala/cc/spray/json/PrettyPrinter.scala')
-rw-r--r-- | src/main/scala/cc/spray/json/PrettyPrinter.scala | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/main/scala/cc/spray/json/PrettyPrinter.scala b/src/main/scala/cc/spray/json/PrettyPrinter.scala new file mode 100644 index 0000000..f0fcf14 --- /dev/null +++ b/src/main/scala/cc/spray/json/PrettyPrinter.scala @@ -0,0 +1,64 @@ +/* + * Copyright (C) 2009-2011 Mathias Doenitz + * + * 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. + */ + +package cc.spray.json + +import java.lang.StringBuilder +import annotation.tailrec + +object PrettyPrinter extends JsonPrinter { + val Indent = 2 + + def print(x: JsValue, sb: StringBuilder) { + print(x, sb, 0) + } + + private def print(x: JsValue, sb: StringBuilder, indent: Int) { + x match { + case JsObject(x) => printObject(x, sb, indent) + case JsArray(x) => printArray(x, sb, indent) + case _ => printLeaf(x, sb) + } + } + + private def printObject(members: List[JsField], sb: StringBuilder, indent: Int) { + sb.append("{\n") + printSeq(members, sb.append(",\n")) { m => + printIndent(sb, indent + Indent) + printString(m.name, sb) + sb.append(": ") + print(m.value, sb, indent + Indent) + } + sb.append('\n') + printIndent(sb, indent) + sb.append("}") + } + + private def printArray(elements: List[JsValue], sb: StringBuilder, indent: Int) { + sb.append('[') + printSeq(elements, sb.append(", "))(print(_, sb, indent)) + sb.append(']') + } + + @tailrec + private def printIndent(sb: StringBuilder, indent: Int) { + if (indent > 0) { + sb.append(' ') + printIndent(sb, indent - 1) + } + } + +}
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