equals and hashCode

app/src/test/java/omega_r/com/omegatypesexample/TextUnitTest.kt

@@ -0,0 +1,45 @@
+package omega_r.com.omegatypesexample
+
+import com.omega_r.libs.omegatypes.Text
+import org.junit.Test
+
+import org.junit.Assert.*
+
+class TextUnitTest {
+    @Test
+    fun text_equals() {
+        assertEquals(Text.empty(), Text.empty())
+        assertNotEquals(Text.empty(), Text.from(""))
+        assertNotEquals(Text.empty(), null)
+        assertNotEquals(Text.empty(), "")
+
+        assertEquals(Text.from("string"), Text.from("string"))
+        assertNotEquals(Text.from("string"), Text.empty())
+        assertNotEquals(Text.from("string"), Text.from(12))
+        assertNotEquals(Text.from("string"), Text.from(12, "string", 12))
+        assertNotEquals(Text.from("string"), null)
+        assertNotEquals(Text.from("string"), "")
+
+        assertEquals(Text.from(12), Text.from(12))
+        assertNotEquals(Text.from(12), Text.empty())
+        assertNotEquals(Text.from(12), Text.from("12"))
+        assertNotEquals(Text.from(12), Text.from(12, "12"))
+        assertNotEquals(Text.from(12), null)
+        assertNotEquals(Text.from(12), "")
+
+        assertEquals(Text.from(12, 11, Text.empty()), Text.from(12, 11, Text.empty()))
+        assertNotEquals(Text.from(12, 11, Text.empty()), Text.empty())
+        assertNotEquals(Text.from(12, 11, Text.empty()), Text.from("12"))
+        assertNotEquals(Text.from(12, 11, Text.empty()), Text.from(12))
+        assertNotEquals(Text.from(12, 11, Text.empty()), null)
+        assertNotEquals(Text.from(12, 11, Text.empty()), "")
+    }
+
+    @Test
+    fun text_hash() {
+        assertEquals(Text.empty().hashCode(), Text.empty().hashCode())
+        assertEquals(Text.from("hello").hashCode(), Text.from("hello").hashCode())
+        assertEquals(Text.from(12).hashCode(), Text.from(12).hashCode())
+        assertEquals(Text.from(12, "hello", 11).hashCode(), Text.from(12, "hello", 11).hashCode())
+    }
+}

build.gradle

@@ -1,17 +1,17 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.60'
+    ext.kotlin_version = '1.2.71'
     ext.supportVersion = '27.1.1'
-    ext.compileSdkVersion = 27
-    ext.targetSdkVersion = 27
+    ext.compileSdkVersion = 28
+    ext.targetSdkVersion = 28
 
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.android.tools.build:gradle:3.2.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
         // NOTE: Do not place your application dependencies here; they belong

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Tue Jun 26 10:22:26 MSK 2018
+#Wed Oct 03 15:12:40 MSK 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

omegatypes/src/main/java/com/omega_r/libs/omegatypes/Text.kt

@@ -8,12 +8,26 @@ import android.widget.EditText
 import android.widget.TextView
 import android.widget.Toast
 import java.io.Serializable
+import java.util.*
 
 open class Text private constructor() : Serializable {
 
     open fun isEmpty(): Boolean = true
     open fun getString(resources: Resources): String? = null
 
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as Text
+
+        return other.isEmpty()
+    }
+
+    override fun hashCode(): Int {
+        return 31 * 17 + "".hashCode()
+    }
+
     companion object {
         @JvmStatic
         fun empty(): Text = Text()
@@ -39,6 +53,20 @@ open class Text private constructor() : Serializable {
         override fun getString(resources: Resources): String? {
             return string
         }
+
+        override fun equals(other: Any?): Boolean {
+            if (this === other) return true
+            if (javaClass != other?.javaClass) return false
+
+            other as StringText
+
+            return string == other.string
+        }
+
+        override fun hashCode(): Int {
+            return 31 * 17 + (string?.hashCode() ?: 0)
+        }
+
     }
 
     private class ResourceText internal constructor(@StringRes private val stringRes: Int) : Text() {
@@ -49,16 +77,45 @@ open class Text private constructor() : Serializable {
             return resources.getString(stringRes)
         }
 
+        override fun equals(other: Any?): Boolean {
+            if (this === other) return true
+            if (javaClass != other?.javaClass) return false
+
+            other as ResourceText
+
+            return stringRes == other.stringRes
+        }
+
+        override fun hashCode(): Int {
+            return 31 * 17 + stringRes
+        }
+
     }
 
     private class FormatResourceText internal constructor(@StringRes private val stringRes: Int,
-                                                  private vararg val formatArgs: Any) : Text() {
+                                                          private vararg val formatArgs: Any) : Text() {
 
         override fun isEmpty(): Boolean = stringRes <= 0
 
         override fun getString(resources: Resources): String {
             return resources.getString(stringRes, *formatArgs)
         }
+
+        override fun equals(other: Any?): Boolean {
+            if (this === other) return true
+            if (javaClass != other?.javaClass) return false
+
+            other as FormatResourceText
+
+            return stringRes == other.stringRes && Arrays.equals(formatArgs, other.formatArgs)
+        }
+
+        override fun hashCode(): Int {
+            var result = 31 * 17 + stringRes
+            result = 31 * result + Arrays.hashCode(formatArgs)
+            return result
+        }
+
     }
 
 }
@@ -82,6 +139,7 @@ fun Text.applyErrorTo(editText: EditText) {
 fun Activity.setTitle(text: Text) {
     title = text.getString(resources)
 }
+
 fun Context.toast(text: Text, duration: Int = Toast.LENGTH_SHORT): Toast {
     return Toast.makeText(this, text.getString(resources), duration).apply { show() }
 }