private void setGlobalVariables()

in modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/engines/TuscanyJRubyScriptEngine.java [327:466]
123 lines of code
15 McCabe index (conditional complexity)

    private void setGlobalVariables(final ScriptContext ctx) {
        ctx.setAttribute("context", ctx, ScriptContext.ENGINE_SCOPE);
        setGlobalVariables(new GlobalVariables(runtime) {
                GlobalVariables parent = runtime.getGlobalVariables();

            @Override
                public void define(String name, IAccessor accessor) {
                    assert name != null;
                    assert accessor != null;
                    assert name.startsWith("$");
                    synchronized (ctx) {
                        Bindings engineScope = ctx.getBindings(ScriptContext.ENGINE_SCOPE);                  
                        engineScope.put(name, new GlobalVariable(accessor)); 
                    }
                }

            @Override
                public void defineReadonly(String name, IAccessor accessor) {
                    assert name != null;
                    assert accessor != null;
                    assert name.startsWith("$");
                    synchronized (ctx) {
                        Bindings engineScope = ctx.getBindings(ScriptContext.ENGINE_SCOPE);
                        engineScope.put(name, new GlobalVariable(new 
                                             ReadonlyAccessor(name, accessor)));
                    }
                } 

            @Override
                public boolean isDefined(String name) {
                    assert name != null;
                    assert name.startsWith("$");
                    synchronized (ctx) {
                        String modifiedName = name.substring(1);
                        boolean defined = ctx.getAttributesScope(modifiedName) != -1;
                        return defined ? true : parent.isDefined(name);
                    }
                }

            @Override
                public void alias(String name, String oldName) {
                    assert name != null;
                    assert oldName != null;
                    assert name.startsWith("$");
                    assert oldName.startsWith("$");

                    if (runtime.getSafeLevel() >= 4) {
                        throw runtime.newSecurityError("Insecure: can't alias global variable");
                    }

                    synchronized (ctx) {
                        int scope = ctx.getAttributesScope(name);
                        if (scope == -1) {
                            scope = ScriptContext.ENGINE_SCOPE;
                        }

                        IRubyObject value = get(oldName);
                        ctx.setAttribute(name, rubyToJava(value), scope);
                    }
                }

            @Override
                public IRubyObject get(String name) {
                    assert name != null;
                    assert name.startsWith("$");

                    synchronized (ctx) {
                        // skip '$' and try
                        String modifiedName = name.substring(1);
                        int scope = ctx.getAttributesScope(modifiedName);
                        if (scope == -1) {
                            return parent.get(name);
                        }

                        Object obj = ctx.getAttribute(modifiedName, scope);
                        if (obj instanceof IAccessor) {
                            return ((IAccessor)obj).getValue();
                        } else {
                            return javaToRuby(obj);
                        }
                    }                    
                }

            @Override
                public IRubyObject set(String name, IRubyObject value) {
                    assert name != null;
                    assert name.startsWith("$");

                    if (runtime.getSafeLevel() >= 4) {
                        throw runtime.newSecurityError("Insecure: can't change global variable value");
                    }

                    synchronized (ctx) {
                        // skip '$' and try
                        String modifiedName = name.substring(1);
                        int scope = ctx.getAttributesScope(modifiedName);
                        if (scope == -1) {
                            scope = ScriptContext.ENGINE_SCOPE;
                        }
                        IRubyObject oldValue = get(name);
                        Object obj = ctx.getAttribute(modifiedName, scope);
                        if (obj instanceof IAccessor) {
                            ((IAccessor)obj).setValue(value);
                        } else {                        
                            ctx.setAttribute(modifiedName, rubyToJava(value), scope);
                            if ("KCODE".equals(modifiedName)) {
                                setKCode((String)rubyToJava(value));
                            } else if ("stdout".equals(modifiedName)) {
                                equalOutputs((RubyObject)value);
                            }
                        }
                        return oldValue;
                    }
                }

            @Override
                public Set<String> getNames() {                    
                    HashSet set = new HashSet();
                    synchronized (ctx) {
                        for (Object scope : ctx.getScopes()) {
                            Bindings b = ctx.getBindings((Integer)scope);
                            if (b != null) {
                                for (Object key: b.keySet()) {
                                    set.add(key);
                                }
                            }
                        }
                    }
                    for (Iterator<String> names = parent.getNames().iterator(); names.hasNext();) {
                        set.add(names.next());
                    }
                    return Collections.unmodifiableSet(set);
                }

            @Override
                public IRubyObject getDefaultSeparator() {
                    return parent.getDefaultSeparator();
                }
            });
    }