Mercurial > hg > truffle
changeset 16268:0e092c1ecd64
JSONHelper: add builders for JSON objects and arrays
author | Andreas Woess <andreas.woess@jku.at> |
---|---|
date | Thu, 26 Jun 2014 18:04:47 +0200 |
parents | c04bdca850a9 |
children | f5437f2db322 |
files | graal/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/JSONHelper.java |
diffstat | 1 files changed, 115 insertions(+), 0 deletions(-) [+] |
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--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/JSONHelper.java Fri Jun 27 16:25:30 2014 +0200 +++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/JSONHelper.java Thu Jun 26 18:04:47 2014 +0200 @@ -24,6 +24,8 @@ */ package com.oracle.truffle.api.utilities; +import java.util.*; + import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.api.source.*; @@ -119,4 +121,117 @@ public static void restart() { AstJsonDumpBuilder = new StringBuilder(); } + + public static JsonObjectBuilder object() { + return new JsonObjectBuilder(); + } + + public static JsonArrayBuilder array() { + return new JsonArrayBuilder(); + } + + public static abstract class JsonStringBuilder { + @Override + public final String toString() { + StringBuilder sb = new StringBuilder(); + appendTo(sb); + return sb.toString(); + } + + protected abstract void appendTo(StringBuilder sb); + + protected static void appendValue(StringBuilder sb, Object value) { + if (value instanceof JsonStringBuilder) { + ((JsonStringBuilder) value).appendTo(sb); + } else if (value instanceof Integer || value instanceof Boolean || value == null) { + sb.append(value); + } else { + sb.append(quote(String.valueOf(value))); + } + } + } + + public static final class JsonObjectBuilder extends JsonStringBuilder { + private final Map<String, Object> contents = new LinkedHashMap<>(); + + private JsonObjectBuilder() { + } + + public JsonObjectBuilder add(String key, String value) { + contents.put(key, value); + return this; + } + + public JsonObjectBuilder add(String key, Number value) { + contents.put(key, value); + return this; + } + + public JsonObjectBuilder add(String key, Boolean value) { + contents.put(key, value); + return this; + } + + public JsonObjectBuilder add(String key, JsonStringBuilder value) { + contents.put(key, value); + return this; + } + + @Override + protected void appendTo(StringBuilder sb) { + sb.append("{"); + boolean comma = false; + for (Map.Entry<String, Object> entry : contents.entrySet()) { + if (comma) { + sb.append(", "); + } + sb.append(quote(entry.getKey())); + sb.append(": "); + appendValue(sb, entry.getValue()); + comma = true; + } + sb.append("}"); + } + } + + public static final class JsonArrayBuilder extends JsonStringBuilder { + private final List<Object> contents = new ArrayList<>(); + + private JsonArrayBuilder() { + } + + public JsonArrayBuilder add(String value) { + contents.add(value); + return this; + } + + public JsonArrayBuilder add(Number value) { + contents.add(value); + return this; + } + + public JsonArrayBuilder add(Boolean value) { + contents.add(value); + return this; + } + + public JsonArrayBuilder add(JsonStringBuilder value) { + contents.add(value); + return this; + } + + @Override + protected void appendTo(StringBuilder sb) { + sb.append("["); + boolean comma = false; + for (Object value : contents) { + if (comma) { + sb.append(", "); + } + appendValue(sb, value); + comma = true; + } + sb.append("]"); + } + } }