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package com.fasterxml.jackson.databind.node;
import java.io.IOException;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.SerializerProvider;
/**
* This concrete value class is used to contain boolean (true / false)
* values. Only two instances are ever created, to minimize memory
* usage.
*/
public class BooleanNode
extends ValueNode
{
private static final long serialVersionUID = 2L;
// // Just need two instances...
public final static BooleanNode TRUE = new BooleanNode(true);
public final static BooleanNode FALSE = new BooleanNode(false);
private final boolean _value;
/**
*
* NOTE: visibility raised to `protected` in 2.9.3 to allow custom subtypes.
*/
protected BooleanNode(boolean v) { _value = v; }
// To support JDK serialization, recovery of Singleton instance
protected Object readResolve() {
return _value ? TRUE : FALSE;
}
public static BooleanNode getTrue() { return TRUE; }
public static BooleanNode getFalse() { return FALSE; }
public static BooleanNode valueOf(boolean b) { return b ? TRUE : FALSE; }
@Override
public JsonNodeType getNodeType() {
return JsonNodeType.BOOLEAN;
}
@Override public JsonToken asToken() {
return _value ? JsonToken.VALUE_TRUE : JsonToken.VALUE_FALSE;
}
@Override
public boolean booleanValue() {
return _value;
}
@Override
public String asText() {
return _value ? "true" : "false";
}
@Override
public boolean asBoolean() {
return _value;
}
@Override
public boolean asBoolean(boolean defaultValue) {
return _value;
}
@Override
public int asInt(int defaultValue) {
return _value ? 1 : 0;
}
@Override
public long asLong(long defaultValue) {
return _value ? 1L : 0L;
}
@Override
public double asDouble(double defaultValue) {
return _value ? 1.0 : 0.0;
}
@Override
public final void serialize(JsonGenerator g, SerializerProvider provider) throws IOException {
g.writeBoolean(_value);
}
@Override
public int hashCode() {
return _value ? 3 : 1;
}
@Override
public boolean equals(Object o)
{
/* 11-Mar-2013, tatu: Apparently ClassLoaders can manage to load
* different instances, rendering identity comparisons broken.
* So let's use value instead.
*/
if (o == this) return true;
if (o == null) return false;
if (!(o instanceof BooleanNode)) {
return false;
}
return (_value == ((BooleanNode) o)._value);
}
}