Examples with FunctionContext buildcraft.lib.expression.FunctionContext used on opensource projects

Example 26 with FunctionContext

use of buildcraft.lib.expression.FunctionContext in project BuildCraft by BuildCraft.

the class JsonVariableObject method putVariables.

protected void putVariables(JsonObject values, FunctionContext fnCtx) {
    for (Entry<String, JsonElement> entry : values.entrySet()) {
        String name = entry.getKey();
        name = name.toLowerCase(Locale.ROOT);
        if (fnCtx.hasLocalVariable(name)) {
            throw new JsonSyntaxException("Duplicate local variable '" + name + "'");
        } else if (fnCtx.getVariable(name) != null) {
            // ...what? Doesn't this disallow overriding existing variables?
            continue;
        }
        JsonElement value = entry.getValue();
        String type = null, getter = null, rounder = null;
        if (value.isJsonObject()) {
            JsonObject objValue = value.getAsJsonObject();
            value = objValue.get("value");
            type = JsonUtils.getString(objValue, "type");
            getter = JsonUtils.getString(objValue, "getter");
            if (objValue.has("rounder")) {
                rounder = JsonUtils.getString(objValue, "rounder");
            }
        }
        if (!value.isJsonPrimitive()) {
            throw new JsonSyntaxException("Expected a primitive, got " + value + " for the variable '" + name + "'");
        }
        NodeStateful stateful = null;
        FunctionContext fnCtxValue = new FunctionContext("Value Object", fnCtx);
        if (getter != null) {
            // stateful node
            Class<?> nodeType;
            try {
                nodeType = NodeTypes.parseType(type);
            } catch (InvalidExpressionException iee) {
                throw new JsonSyntaxException("Could not parse node type for variable '" + name + "'", iee);
            }
            IGetterFunc getterFunc = parseGetterFunction(getter, fnCtx);
            try {
                stateful = new NodeStateful(name, nodeType, getterFunc);
            } catch (InvalidExpressionException iee) {
                throw new JsonSyntaxException("Could not create a getter for the variable '" + name + "'", iee);
            }
            fnCtx.putVariable(name, stateful.getter);
            fnCtxValue.putVariable(name, stateful.variable);
            if (rounder != null) {
                FunctionContext fnCtx2 = new FunctionContext("Rounding", fnCtx);
                fnCtx2.putVariable("last", stateful.last);
                fnCtx2.putVariable("current", stateful.variable);
                fnCtx2.putVariable("value", stateful.rounderValue);
                try {
                    IExpressionNode nodeRounder = InternalCompiler.compileExpression(rounder, fnCtx2);
                    stateful.setRounder(nodeRounder);
                } catch (InvalidExpressionException iee) {
                    throw new JsonSyntaxException("Could not compile a rounder for the variable '" + name + "'", iee);
                }
            }
        }
        String expression = value.getAsString();
        IExpressionNode node;
        try {
            node = InternalCompiler.compileExpression(expression, fnCtxValue);
        } catch (InvalidExpressionException e) {
            throw new JsonSyntaxException("Failed to compile variable " + name, e);
        }
        if (node instanceof IConstantNode) {
            // No point in adding it to variables
            fnCtx.putVariable(name, node);
            continue;
        }
        if (variables.containsKey(name)) {
            ITickableNode.Source existing = variables.get(name);
            existing.setSource(node);
        } else if (stateful != null) {
            stateful.setSource(node);
            variables.put(name, stateful);
        } else {
            NodeUpdatable nodeUpdatable = new NodeUpdatable(name, node);
            variables.put(name, nodeUpdatable);
            fnCtx.putVariable(name, nodeUpdatable.variable);
        }
    }
}