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Javet is Java + V8 (JAVa + V + EighT). It is an awesome way of embedding Node.js and V8 in Java.
/*
* Copyright (c) 2021-2022. caoccao.com Sam Cao
*
* 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 com.caoccao.javet.values.reference;
import com.caoccao.javet.annotations.CheckReturnValue;
import com.caoccao.javet.enums.V8ContextType;
import com.caoccao.javet.exceptions.JavetException;
import com.caoccao.javet.values.V8Value;
import com.caoccao.javet.values.primitive.V8ValueNull;
import com.caoccao.javet.values.primitive.V8ValuePrimitive;
import com.caoccao.javet.values.primitive.V8ValueUndefined;
import java.math.BigInteger;
/**
* The interface V8 context.
*
* @since 2.0.1
*/
@SuppressWarnings("unchecked")
public interface IV8Context extends IV8ValueReference {
/**
* Gets element by index.
*
* @param the type parameter
* @param index the index
* @return the element
* @throws JavetException the javet exception
* @since 2.0.1
*/
@CheckReturnValue
T get(int index) throws JavetException;
/**
* Gets element as big integer by index.
*
* @param index the index
* @return the element as big integer
* @throws JavetException the javet exception
* @since 2.0.1
*/
default BigInteger getBigInteger(int index) throws JavetException {
return getPrimitive(index);
}
/**
* Gets element as boolean by key object.
*
* @param index the index
* @return the element as boolean
* @throws JavetException the javet exception
* @since 2.0.1
*/
default Boolean getBoolean(int index) throws JavetException {
return getPrimitive(index);
}
/**
* Gets element as double by key object.
*
* @param index the index
* @return the element as double
* @throws JavetException the javet exception
* @since 2.0.1
*/
default Double getDouble(int index) throws JavetException {
return getPrimitive(index);
}
/**
* Gets element as float by key object.
*
* @param index the index
* @return the element as float
* @throws JavetException the javet exception
* @since 2.0.1
*/
default Float getFloat(int index) throws JavetException {
Double result = getDouble(index);
return result == null ? null : result.floatValue();
}
/**
* Gets element as integer by key object.
*
* @param index the index
* @return the element as integer
* @throws JavetException the javet exception
* @since 2.0.1
*/
default Integer getInteger(int index) throws JavetException {
return getPrimitive(index);
}
/**
* Gets the element length.
*
* @return the element length
* @throws JavetException the javet exception
* @since 2.0.1
*/
int getLength() throws JavetException;
/**
* Gets element as long by key object.
*
* @param index the index
* @return the element as long
* @throws JavetException the javet exception
* @since 2.0.1
*/
default Long getLong(int index) throws JavetException {
return getPrimitive(index);
}
/**
* Gets element as null by key object.
*
* @param index the index
* @return the element as null
* @throws JavetException the javet exception
* @since 2.0.1
*/
default V8ValueNull getNull(int index) throws JavetException {
return get(index);
}
/**
* Gets element as object by key object.
*
* @param the type parameter
* @param index the index
* @return the element as object
* @throws JavetException the javet exception
* @since 2.0.1
*/
default T getObject(int index) throws JavetException {
try {
return getV8Runtime().toObject(get(index), true);
} catch (JavetException e) {
throw e;
} catch (Throwable t) {
return null;
}
}
/**
* Gets element as primitive by index.
*
* @param the type parameter
* @param the type parameter
* @param index the index
* @return the element as primitive
* @throws JavetException the javet exception
* @since 2.0.1
*/
default > R getPrimitive(int index) throws JavetException {
try (V8Value v8Value = get(index)) {
return ((T) v8Value).getValue();
} catch (JavetException e) {
throw e;
} catch (Throwable ignored) {
}
return null;
}
/**
* Gets string by index.
*
* @param index the index
* @return the string
* @throws JavetException the javet exception
* @since 2.0.1
*/
default String getString(int index) throws JavetException {
return getPrimitive(index);
}
/**
* Gets undefined by index.
*
* @param index the index
* @return the undefined
* @throws JavetException the javet exception
* @since 2.0.1
*/
default V8ValueUndefined getUndefined(int index) throws JavetException {
return get(index);
}
/**
* Is Await context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isAwaitContext() throws JavetException {
return isContextType(V8ContextType.Await);
}
/**
* Is Block context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isBlockContext() throws JavetException {
return isContextType(V8ContextType.Block);
}
/**
* Is Catch context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isCatchContext() throws JavetException {
return isContextType(V8ContextType.Catch);
}
/**
* Is the given context type.
*
* @param v8ContextType the V8 context type
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
boolean isContextType(V8ContextType v8ContextType) throws JavetException;
/**
* Is DebugEvaluate context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isDebugEvaluateContext() throws JavetException {
return isContextType(V8ContextType.DebugEvaluate);
}
/**
* Is Declaration context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isDeclarationContext() throws JavetException {
return isContextType(V8ContextType.Declaration);
}
/**
* Is Eval context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isEvalContext() throws JavetException {
return isContextType(V8ContextType.Eval);
}
/**
* Is Function context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isFunctionContext() throws JavetException {
return isContextType(V8ContextType.Function);
}
/**
* Is Module context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isModuleContext() throws JavetException {
return isContextType(V8ContextType.Module);
}
/**
* Is Script context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isScriptContext() throws JavetException {
return isContextType(V8ContextType.Script);
}
/**
* Is With context.
*
* @return true : yes, false : no
* @throws JavetException the javet exception
* @since 2.0.1
*/
default boolean isWithContext() throws JavetException {
return isContextType(V8ContextType.With);
}
/**
* Sets the element length.
*
* @param length the element length
* @return true : success, false: failure
* @throws JavetException the javet exception
* @since 2.0.1
*/
boolean setLength(int length) throws JavetException;
}