Examples with Context org.matheclipse.core.expression.Context used on opensource projects

Example 1 with Context

use of org.matheclipse.core.expression.Context in project symja_android_library by axkr.

the class EvalEngine method beginPackage.

public Context beginPackage(String contextName) {
    fContextPathStack.push(fContextPath);
    Context packageContext = fContextPath.getContext(contextName);
    setContextPath(new ContextPath(packageContext));
    ContextPath.PACKAGES.add(contextName);
    return packageContext;
}

Example 2 with Context

use of org.matheclipse.core.expression.Context in project symja_android_library by axkr.

the class Validate method checkIdentifierHoldPattern.

public static IExpr checkIdentifierHoldPattern(final IExpr expr, IAST ast, EvalEngine engine) {
    ISymbol sym = null;
    if (expr.isString()) {
        String identifier = expr.toString();
        if (!Scanner.isIdentifier(identifier)) {
            // Argument `1` at position `2` is expected to be a symbol.
            return IOFunctions.printMessage(ast.topHead(), "sym", F.list(expr, F.C1), engine);
        }
        int indx = identifier.lastIndexOf('`');
        if (indx > 0) {
            ContextPath contextPath = engine.getContextPath();
            Context context = contextPath.getContext(identifier.substring(0, indx + 1));
            sym = contextPath.symbol(identifier.substring(indx + 1), context, engine.isRelaxedSyntax());
        } else {
            sym = F.symbol(identifier, engine);
        }
    } else if (expr.isSymbol()) {
        sym = (ISymbol) expr;
    } else if (expr.isAST(S.HoldPattern, 2) && expr.first().isSymbol()) {
        sym = (ISymbol) expr.first();
    } else {
        // Symbol, string or HoldPattern(symbol) expected at position `2` in `1`.
        return IOFunctions.printMessage(ast.topHead(), "ssle", F.list(expr, F.C1), engine);
    }
    return sym;
}

Example 3 with Context

use of org.matheclipse.core.expression.Context in project symja_android_library by axkr.

the class IOFunctions method getNamesByPattern.

public static IAST getNamesByPattern(java.util.regex.Pattern pattern, EvalEngine engine) {
    ContextPath contextPath = engine.getContextPath();
    IASTAppendable list = F.ListAlloc(31);
    Map<String, Context> contextMap = contextPath.getContextMap();
    for (Map.Entry<String, Context> mapEntry : contextMap.entrySet()) {
        Context context = mapEntry.getValue();
        for (Map.Entry<String, ISymbol> entry : context.entrySet()) {
            String fullName = context.completeContextName() + entry.getKey();
            java.util.regex.Matcher matcher = pattern.matcher(fullName);
            if (matcher.matches()) {
                if (ParserConfig.PARSER_USE_LOWERCASE_SYMBOLS && context.equals(Context.SYSTEM)) {
                    String str = AST2Expr.PREDEFINED_SYMBOLS_MAP.get(entry.getValue().getSymbolName());
                    if (str != null) {
                        list.append(F.$str(str));
                        continue;
                    }
                }
                ISymbol value = entry.getValue();
                if (context.isGlobal() || context.isSystem()) {
                    list.append(F.$str(value.toString()));
                } else {
                    list.append(F.$str(fullName));
                }
            }
        }
    }
    for (Context context : contextPath) {
        String completeContextName = context.completeContextName();
        if (!contextMap.containsKey(completeContextName)) {
            for (Map.Entry<String, ISymbol> entry : context.entrySet()) {
                String fullName = completeContextName + entry.getKey();
                java.util.regex.Matcher matcher = pattern.matcher(fullName);
                if (matcher.matches()) {
                    if (ParserConfig.PARSER_USE_LOWERCASE_SYMBOLS && context.equals(Context.SYSTEM)) {
                        String str = AST2Expr.PREDEFINED_SYMBOLS_MAP.get(entry.getValue().getSymbolName());
                        if (str != null) {
                            list.append(F.$str(str));
                            continue;
                        }
                    }
                    ISymbol value = entry.getValue();
                    if (context.isGlobal() || context.isSystem()) {
                        list.append(F.$str(value.toString()));
                    } else {
                        list.append(F.$str(fullName));
                    }
                }
            }
        }
    }
    return list;
}

Example 4 with Context

use of org.matheclipse.core.expression.Context in project symja_android_library by axkr.

the class WolframFormFactory method convertSymbol.

@Override
public void convertSymbol(final Appendable buf, final ISymbol symbol) throws IOException {
    Context context = symbol.getContext();
    if (context == Context.DUMMY) {
        append(buf, symbol.getSymbolName());
        return;
    }
    String str = AST2Expr.PREDEFINED_SYMBOLS_MAP.get(symbol.getSymbolName());
    if (str != null) {
        // assuming Wolfram language built-in function
        append(buf, str);
        return;
    }
    if (EvalEngine.get().getContextPath().contains(context)) {
        append(buf, symbol.getSymbolName());
    } else {
        append(buf, context.completeContextName() + symbol.getSymbolName());
    }
}

Example 5 with Context

use of org.matheclipse.core.expression.Context in project symja_android_library by axkr.

the class SerializableTest method testEvalEngine.

public void testEvalEngine() {
    try {
        EvalEngine engine = EvalEngine.get();
        engine.evaluate("x=10");
        Context context = engine.getContextPath().getGlobalContext();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(context);
        byte[] bArray = baos.toByteArray();
        baos.close();
        oos.close();
        ByteArrayInputStream bais = new ByteArrayInputStream(bArray);
        ObjectInputStream ois = new ObjectInputStream(bais);
        Context copy = (Context) ois.readObject();
        bais.close();
        ois.close();
        engine.getContextPath().setGlobalContext(copy);
        IExpr result = engine.evaluate("x");
        assertEquals("10", result.toString());
    } catch (ClassNotFoundException cnfe) {
        cnfe.printStackTrace();
        assertEquals("", cnfe.toString());
    } catch (IOException ioe) {
        ioe.printStackTrace();
        assertEquals("", ioe.toString());
    }
}