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package com.jsoniter;

import com.jsoniter.spi.ClassInfo;

import com.jsoniter.spi.TypeLiteral;

import java.lang.reflect.Type;

class CodegenImplMap {

public static String genMap(ClassInfo classInfo) {

Type keyType = classInfo.typeArgs[0];

Type valueType = classInfo.typeArgs[1];

StringBuilder lines = new StringBuilder();

append(lines, "{{clazz}} map = ({{clazz}})com.jsoniter.CodegenAccess.resetExistingObject(iter);");

append(lines, "if (iter.readNull()) { return null; }");

append(lines, "if (map == null) { map = new {{clazz}}(); }");

append(lines, "if (!com.jsoniter.CodegenAccess.readObjectStart(iter)) {");

append(lines, "return map;");

append(lines, "}");

append(lines, "do {");

if (keyType == String.class) {

append(lines, "Object mapKey = com.jsoniter.CodegenAccess.readObjectFieldAsString(iter);");

} else {

append(lines, "Object mapKey = com.jsoniter.CodegenAccess.readMapKey(\"" +

TypeLiteral.create(keyType).getDecoderCacheKey() +"\", iter);");

}

append(lines, "map.put(mapKey, {{op}});");

append(lines, "} while (com.jsoniter.CodegenAccess.nextToken(iter) == ',');");

append(lines, "return map;");

return lines.toString()

.replace("{{clazz}}", classInfo.clazz.getName())

.replace("{{op}}", CodegenImplNative.genReadOp(valueType));

}

private static void append(StringBuilder lines, String str) {

lines.append(str);

lines.append("\n");

}

}