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JavaScript Object Notation (JSON) codec that incrementally parses and writes swim-structure values
// Copyright 2015-2019 SWIM.AI inc.
//
// 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 swim.json;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.util.Iterator;
import swim.codec.Base10;
import swim.codec.Base16;
import swim.codec.Output;
import swim.codec.Unicode;
import swim.codec.Writer;
/**
* Factory for constructing JSON writers.
*/
public abstract class JsonWriter {
public abstract Iterator items(I item);
public abstract I item(V value);
public abstract V key(I item);
public abstract V value(I item);
public abstract Writer writeItem(I item, Output output);
public abstract Writer writeField(I item, Output output, int index);
public abstract Writer writeValue(I item, Output output, int index);
public abstract Writer writeValue(V value, Output output);
public Writer writeField(V key, V value, Output output) {
return FieldWriter.write(output, this, key, value);
}
public Writer writeArray(I item, Output output) {
return ArrayWriter.write(output, this, items(item));
}
public Writer writeObject(I item, Output output) {
return ObjectWriter.write(output, this, items(item));
}
public Writer writeData(ByteBuffer value, Output output) {
if (value != null) {
return DataWriter.write(output, value);
} else {
return Unicode.writeString("\"\"", output);
}
}
public Writer writeText(String value, Output output) {
return StringWriter.write(output, value);
}
public Writer writeNum(int value, Output output) {
return Base10.writeInt(value, output);
}
public Writer writeNum(long value, Output output) {
return Base10.writeLong(value, output);
}
public Writer writeNum(float value, Output output) {
return Base10.writeFloat(value, output);
}
public Writer writeNum(double value, Output output) {
return Base10.writeDouble(value, output);
}
public Writer writeNum(BigInteger value, Output output) {
return Unicode.writeString(value, output);
}
public Writer writeUint32(int value, Output output) {
return Base16.lowercase().writeIntLiteral(value, output, 8);
}
public Writer writeUint64(long value, Output output) {
return Base16.lowercase().writeLongLiteral(value, output, 16);
}
public Writer writeBool(boolean value, Output output) {
return Unicode.writeString(value ? "true" : "false", output);
}
public Writer writeNull(Output output) {
return Unicode.writeString("null", output);
}
public Writer writeUndefined(Output output) {
return Unicode.writeString("undefined", output);
}
}