| package org.codehaus.jackson.node; |
| |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| |
| /** |
| * Base class that specifies methods for getting access to |
| * Node instances (newly constructed, or shared, depending |
| * on type), as well as basic implementation of the methods. |
| * Designed to be sub-classed if extended functionality (additions |
| * to behavior of node types, mostly) is needed. |
| */ |
| public class JsonNodeFactory |
| { |
| /** |
| * Default singleton instance that construct "standard" node instances: |
| * given that this class is stateless, a globally shared singleton |
| * can be used. |
| */ |
| public final static JsonNodeFactory instance = new JsonNodeFactory(); |
| |
| protected JsonNodeFactory() { } |
| |
| /* |
| /********************************************************** |
| /* Factory methods for literal values |
| /********************************************************** |
| */ |
| |
| /** |
| * Factory method for getting an instance of JSON boolean value |
| * (either literal 'true' or 'false') |
| */ |
| public BooleanNode booleanNode(boolean v) { |
| return v ? BooleanNode.getTrue() : BooleanNode.getFalse(); |
| } |
| |
| /** |
| * Factory method for getting an instance of JSON null node (which |
| * represents literal null value) |
| */ |
| public NullNode nullNode() { return NullNode.getInstance(); } |
| |
| /* |
| /********************************************************** |
| /* Factory methods for numeric values |
| /********************************************************** |
| */ |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given 8-bit value |
| */ |
| public NumericNode numberNode(byte v) { return IntNode.valueOf(v); } |
| |
| /** |
| * Alternate factory method that will handle wrapper value, which may |
| * be null. |
| * Due to possibility of null, returning type is not guaranteed to be |
| * {@link NumericNode}, but just {@link ValueNode}. |
| * |
| * @since 1.9 |
| */ |
| public ValueNode numberNode(Byte value) { |
| return (value == null) ? nullNode() : IntNode.valueOf(value.intValue()); |
| } |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given 16-bit integer value |
| */ |
| public NumericNode numberNode(short v) { return IntNode.valueOf(v); } |
| |
| /** |
| * Alternate factory method that will handle wrapper value, which may |
| * be null. |
| * Due to possibility of null, returning type is not guaranteed to be |
| * {@link NumericNode}, but just {@link ValueNode}. |
| * |
| * @since 1.9 |
| */ |
| public ValueNode numberNode(Short value) { |
| return (value == null) ? nullNode() : IntNode.valueOf(value.shortValue()); |
| } |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given 32-bit integer value |
| */ |
| public NumericNode numberNode(int v) { return IntNode.valueOf(v); } |
| |
| /** |
| * Alternate factory method that will handle wrapper value, which may |
| * be null. |
| * Due to possibility of null, returning type is not guaranteed to be |
| * {@link NumericNode}, but just {@link ValueNode}. |
| * |
| * @since 1.9 |
| */ |
| public ValueNode numberNode(Integer value) { |
| return (value == null) ? nullNode() : IntNode.valueOf(value.intValue()); |
| } |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given 64-bit integer value |
| */ |
| public NumericNode numberNode(long v) { return LongNode.valueOf(v); } |
| |
| /** |
| * Alternate factory method that will handle wrapper value, which may |
| * be null. |
| * Due to possibility of null, returning type is not guaranteed to be |
| * {@link NumericNode}, but just {@link ValueNode}. |
| * |
| * @since 1.9 |
| */ |
| public ValueNode numberNode(Long value) { |
| return (value == null) ? nullNode() : LongNode.valueOf(value.longValue()); |
| } |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given unlimited range integer value |
| */ |
| public NumericNode numberNode(BigInteger v) { return BigIntegerNode.valueOf(v); } |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given 32-bit floating point value |
| */ |
| public NumericNode numberNode(float v) { return DoubleNode.valueOf((double) v); } |
| |
| /** |
| * Alternate factory method that will handle wrapper value, which may |
| * be null. |
| * Due to possibility of null, returning type is not guaranteed to be |
| * {@link NumericNode}, but just {@link ValueNode}. |
| * |
| * @since 1.9 |
| */ |
| public ValueNode numberNode(Float value) { |
| return (value == null) ? nullNode() : DoubleNode.valueOf(value.doubleValue()); |
| } |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given 64-bit floating point value |
| */ |
| public NumericNode numberNode(double v) { return DoubleNode.valueOf(v); } |
| |
| /** |
| * Alternate factory method that will handle wrapper value, which may |
| * be null. |
| * Due to possibility of null, returning type is not guaranteed to be |
| * {@link NumericNode}, but just {@link ValueNode}. |
| * |
| * @since 1.9 |
| */ |
| public ValueNode numberNode(Double value) { |
| return (value == null) ? nullNode() : DoubleNode.valueOf(value.doubleValue()); |
| } |
| |
| /** |
| * Factory method for getting an instance of JSON numeric value |
| * that expresses given unlimited precision floating point value |
| */ |
| public NumericNode numberNode(BigDecimal v) { return DecimalNode.valueOf(v); } |
| |
| /* |
| /********************************************************** |
| /* Factory methods for textual values |
| /********************************************************** |
| */ |
| |
| /** |
| * Factory method for constructing a node that represents JSON |
| * String value |
| */ |
| public TextNode textNode(String text) { return TextNode.valueOf(text); } |
| |
| /** |
| * Factory method for constructing a node that represents given |
| * binary data, and will get serialized as equivalent base64-encoded |
| * String value |
| */ |
| public BinaryNode binaryNode(byte[] data) { return BinaryNode.valueOf(data); } |
| |
| /** |
| * Factory method for constructing a node that represents given |
| * binary data, and will get serialized as equivalent base64-encoded |
| * String value |
| */ |
| public BinaryNode binaryNode(byte[] data, int offset, int length) { |
| return BinaryNode.valueOf(data, offset, length); |
| } |
| |
| /* |
| /********************************************************** |
| /* Factory method for structured values |
| /********************************************************** |
| */ |
| |
| /** |
| * Factory method for constructing an empty JSON Array node |
| */ |
| public ArrayNode arrayNode() { return new ArrayNode(this); } |
| |
| /** |
| * Factory method for constructing an empty JSON Object ("struct") node |
| */ |
| public ObjectNode objectNode() { return new ObjectNode(this); } |
| |
| /** |
| * Factory method for constructing a wrapper for POJO |
| * ("Plain Old Java Object") objects; these will get serialized |
| * using data binding, usually as JSON Objects, but in some |
| * cases as JSON Strings or other node types. |
| */ |
| public POJONode POJONode(Object pojo) { return new POJONode(pojo); } |
| } |
| |