javax.json.JsonValue Maven / Gradle / Ivy
Show all versions of virtdata-lib-realer Show documentation
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2011-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.json;
/**
* JsonValue represents an immutable JSON value.
*
*
* A JSON value is one of the following:
* an object ({@link JsonObject}), an array ({@link JsonArray}),
* a number ({@link JsonNumber}), a string ({@link JsonString}),
* {@code true} ({@link JsonValue#TRUE JsonValue.TRUE}), {@code false}
* ({@link JsonValue#FALSE JsonValue.FALSE}),
* or {@code null} ({@link JsonValue#NULL JsonValue.NULL}).
*
* @author Jitendra Kotamraju
*/
public interface JsonValue {
/**
* Indicates the type of a {@link JsonValue} object.
*/
enum ValueType {
/**
* JSON array.
*/
ARRAY,
/**
* JSON object.
*/
OBJECT,
/**
* JSON string.
*/
STRING,
/**
* JSON number.
*/
NUMBER,
/**
* JSON true.
*/
TRUE,
/**
* JSON false.
*/
FALSE,
/**
* JSON null.
*/
NULL
}
/**
* JSON null value.
*/
static final JsonValue NULL = new JsonValue() {
@Override
public ValueType getValueType() {
return ValueType.NULL;
}
/**
* Compares the specified object with this {@link JsonValue#NULL}
* object for equality. Returns {@code true} if and only if the
* specified object is also a {@code JsonValue}, and their
* {@link #getValueType()} objects are equal.
*
* @param obj the object to be compared for equality with this
* {@code JsonValue}
* @return {@code true} if the specified object is equal to this
* {@code JsonValue}
*/
@Override
public boolean equals(Object obj) {
if (obj instanceof JsonValue) {
return getValueType().equals(((JsonValue)obj).getValueType());
}
return false;
}
/**
* Returns the hash code value for this {@link JsonValue#NULL} object.
* The hash code of the {@link JsonValue#NULL} object is defined to be
* its {@link #getValueType()} object's hash code.
*
* @return the hash code value for this JsonString object
*/
@Override
public int hashCode() {
return ValueType.NULL.hashCode();
}
/**
* Returns a "null" string.
*
* @return "null"
*/
@Override
public String toString() {
return "null";
}
};
/**
* JSON true value.
*/
static final JsonValue TRUE = new JsonValue() {
@Override
public ValueType getValueType() {
return ValueType.TRUE;
}
/**
* Compares the specified object with this {@link JsonValue#TRUE}
* object for equality. Returns {@code true} if and only if the
* specified object is also a JsonValue, and their
* {@link #getValueType()} objects are equal.
*
* @param obj the object to be compared for equality with this JsonValue.
* @return {@code true} if the specified object is equal to this JsonValue.
*/
@Override
public boolean equals(Object obj) {
if (obj instanceof JsonValue) {
return getValueType().equals(((JsonValue)obj).getValueType());
}
return false;
}
/**
* Returns the hash code value for this {@link JsonValue#TRUE} object.
* The hash code of the {@link JsonValue#TRUE} object is defined to be
* its {@link #getValueType()} object's hash code.
*
* @return the hash code value for this JsonString object
*/
@Override
public int hashCode() {
return ValueType.TRUE.hashCode();
}
/**
* Returns "true" string
*
* @return "true"
*/
@Override
public String toString() {
return "true";
}
};
/**
* JSON false value
*/
static final JsonValue FALSE = new JsonValue() {
@Override
public ValueType getValueType() {
return ValueType.FALSE;
}
/**
* Compares the specified object with this {@link JsonValue#FALSE}
* object for equality. Returns {@code true} if and only if the
* specified object is also a JsonValue, and their
* {@link #getValueType()} objects are equal.
*
* @param obj the object to be compared for equality with this JsonValue
* @return {@code true} if the specified object is equal to this JsonValue
*/
@Override
public boolean equals(Object obj) {
if (obj instanceof JsonValue) {
return getValueType().equals(((JsonValue)obj).getValueType());
}
return false;
}
/**
* Returns the hash code value for this {@link JsonValue#FALSE} object.
* The hash code of the {@link JsonValue#FALSE} object is defined to be
* its {@link #getValueType()} object's hash code.
*
* @return the hash code value for this JsonString object
*/
@Override
public int hashCode() {
return ValueType.FALSE.hashCode();
}
/**
* Returns "false" string
*
* @return "false"
*/
@Override
public String toString() {
return "false";
}
};
/**
* Returns the value type of this JSON value.
*
* @return JSON value type
*/
ValueType getValueType();
/**
* Returns JSON text for this JSON value.
*
* @return JSON text
*/
@Override
String toString();
}