Added SystemEnvironmentPropertySource to get the values of the enviro…

…nment properties.

cmdline.go

@@ -13,7 +13,6 @@ type CommandLinePropertySource interface {
 }
 
 type SimpleCommandLinePropertySource struct {
-	name   string
 	source CommandLineArgs
 }
 
@@ -23,26 +22,13 @@ func NewSimpleCommandLinePropertySource(args []string) SimpleCommandLineProperty
 		panic(err)
 	}
 	cmdlinePropertySource := SimpleCommandLinePropertySource{
-		name:   ProcyonApplicationCommandLinePropertySource,
-		source: cmdLineArgs,
-	}
-	return cmdlinePropertySource
-}
-
-func SimpleCommandLinePropertySourceWithName(name string, args []string) SimpleCommandLinePropertySource {
-	cmdLineArgs, err := NewCommandLineArgsParser().Parse(args)
-	if err != nil {
-		panic(err)
-	}
-	cmdlinePropertySource := SimpleCommandLinePropertySource{
-		name:   name,
 		source: cmdLineArgs,
 	}
 	return cmdlinePropertySource
 }
 
 func (cmdLineSource SimpleCommandLinePropertySource) GetName() string {
-	return cmdLineSource.name
+	return ProcyonApplicationCommandLinePropertySource
 }
 
 func (cmdLineSource SimpleCommandLinePropertySource) GetSource() interface{} {

environment.go

@@ -1,6 +1,9 @@
 package core
 
-import "os"
+import (
+	"os"
+	"strings"
+)
 
 type Environment interface {
 	PropertyResolver
@@ -47,3 +50,87 @@ func (env StandardEnvironment) GetProperty(name string, defaultValue string) int
 func (env StandardEnvironment) GetTypeConverterService() TypeConverterService {
 	return env.converterService
 }
+
+const ProcyonSystemEnvironmentPropertySource = "ProcyonSystemEnvironmentPropertySource"
+
+type SystemEnvironmentPropertySource struct {
+	environmentProperties map[string]string
+}
+
+func NewSystemEnvironmentPropertySource() SystemEnvironmentPropertySource {
+	propertySource := SystemEnvironmentPropertySource{
+		environmentProperties: make(map[string]string, 0),
+	}
+
+	environmentProperties := os.Environ()
+	for _, property := range environmentProperties {
+		index := strings.Index(property, "=")
+		if index != -1 {
+			propertySource.environmentProperties[property[:index]] = property[index+1:]
+		}
+	}
+	return propertySource
+}
+
+func (propertySource SystemEnvironmentPropertySource) GetName() string {
+	return ProcyonSystemEnvironmentPropertySource
+}
+
+func (propertySource SystemEnvironmentPropertySource) GetSource() interface{} {
+	return propertySource.environmentProperties
+}
+
+func (propertySource SystemEnvironmentPropertySource) GetProperty(name string) interface{} {
+	actualPropertyName := propertySource.checkPropertyName(strings.ToLower(name))
+	if actualPropertyName != nil {
+		return propertySource.environmentProperties[actualPropertyName.(string)]
+	}
+
+	actualPropertyName = propertySource.checkPropertyName(strings.ToUpper(name))
+	if actualPropertyName != nil {
+		return propertySource.environmentProperties[actualPropertyName.(string)]
+	}
+	return nil
+}
+
+func (propertySource SystemEnvironmentPropertySource) ContainsProperty(name string) bool {
+	return propertySource.checkPropertyName(strings.ToUpper(name)) != nil || propertySource.checkPropertyName(strings.ToLower(name)) != nil
+}
+
+func (propertySource SystemEnvironmentPropertySource) GetPropertyNames() []string {
+	keys := make([]string, 0, len(propertySource.environmentProperties))
+	for key, _ := range propertySource.environmentProperties {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
+func (propertySource SystemEnvironmentPropertySource) checkIfPresent(propertyName string) bool {
+	if _, ok := propertySource.environmentProperties[propertyName]; ok {
+		return true
+	}
+	return false
+}
+
+func (propertySource SystemEnvironmentPropertySource) checkPropertyName(propertyName string) interface{} {
+	if propertySource.checkIfPresent(propertyName) {
+		return propertyName
+	}
+
+	noHyphenPropertyName := strings.ReplaceAll(propertyName, "-", "_")
+	if propertyName != noHyphenPropertyName && propertySource.checkIfPresent(noHyphenPropertyName) {
+		return noHyphenPropertyName
+	}
+
+	noDotPropertyName := strings.ReplaceAll(propertyName, ".", "_")
+	if propertyName != noDotPropertyName && propertySource.checkIfPresent(noDotPropertyName) {
+		return noDotPropertyName
+	}
+
+	noHyphenAndNoDotName := strings.ReplaceAll(noDotPropertyName, "-", "_")
+	if noDotPropertyName != noHyphenAndNoDotName && propertySource.checkIfPresent(noHyphenAndNoDotName) {
+		return noHyphenAndNoDotName
+	}
+
+	return nil
+}