From 913411773f708a5d3d73cc7953a75c596f9bd7cd Mon Sep 17 00:00:00 2001
From: qza <kokovic.zoran@gmail.com>
Date: Wed, 1 Jun 2016 22:20:55 +0200
Subject: [PATCH] #355 document, abstract base, traits and example domain

---
 .../abstractdocument/AbstractDocument.java    | 38 +++++++++++++++++++
 .../iluwatar/abstractdocument/Document.java   | 34 +++++++++++++++++
 .../iluwatar/abstractdocument/domain/Car.java | 18 +++++++++
 .../abstractdocument/domain/HasModel.java     | 13 +++++++
 .../abstractdocument/domain/HasParts.java     | 13 +++++++
 .../abstractdocument/domain/HasPrice.java     | 13 +++++++
 .../abstractdocument/domain/Part.java         | 18 +++++++++
 7 files changed, 147 insertions(+)
 create mode 100644 abstract-document/src/main/java/com/iluwatar/abstractdocument/AbstractDocument.java
 create mode 100644 abstract-document/src/main/java/com/iluwatar/abstractdocument/Document.java
 create mode 100644 abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Car.java
 create mode 100644 abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasModel.java
 create mode 100644 abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasParts.java
 create mode 100644 abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasPrice.java
 create mode 100644 abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Part.java

diff --git a/abstract-document/src/main/java/com/iluwatar/abstractdocument/AbstractDocument.java b/abstract-document/src/main/java/com/iluwatar/abstractdocument/AbstractDocument.java
new file mode 100644
index 000000000..d4aa8ed5b
--- /dev/null
+++ b/abstract-document/src/main/java/com/iluwatar/abstractdocument/AbstractDocument.java
@@ -0,0 +1,38 @@
+package com.iluwatar.abstractdocument;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+import java.util.stream.Stream;
+
+public abstract class AbstractDocument implements Document {
+
+	private final Map<String, Object> properties;
+
+	protected AbstractDocument(Map<String, Object> properties) {
+		Objects.requireNonNull(properties, "properties map is required");
+		this.properties = properties;
+	}
+
+	@Override
+	public Void put(String key, Object value) {
+		properties.put(key, value);
+		return null;
+	}
+
+	@Override
+	public Object get(String key) {
+		return properties.get(key);
+	}
+
+	@Override
+	public <T> Stream<T> children(String key, Function<Map<String, Object>, T> constructor) {
+		return Stream.of(get(key))
+				.filter(el -> el != null)
+				.map(el -> (List<Map<String, Object>>) el)
+				.findFirst().get().stream()
+				.map(constructor);
+	}
+
+}
diff --git a/abstract-document/src/main/java/com/iluwatar/abstractdocument/Document.java b/abstract-document/src/main/java/com/iluwatar/abstractdocument/Document.java
new file mode 100644
index 000000000..8d4db30b9
--- /dev/null
+++ b/abstract-document/src/main/java/com/iluwatar/abstractdocument/Document.java
@@ -0,0 +1,34 @@
+package com.iluwatar.abstractdocument;
+
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Stream;
+
+public interface Document {
+
+	/**
+	 * Puts the value related to the key
+	 * 
+	 * @param key
+	 * @param value
+	 * @return Void
+	 */
+	Void put(String key, Object value);
+
+	/**
+	 * Gets the value for the key
+	 * 
+	 * @param key
+	 * @return value or null
+	 */
+	Object get(String key);
+
+	/**
+	 * Gets the stream of child documents
+	 * 
+	 * @param key
+	 * @param constructor
+	 * @return child documents
+	 */
+	<T> Stream<T> children(String key, Function<Map<String, Object>, T> constructor);
+}
diff --git a/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Car.java b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Car.java
new file mode 100644
index 000000000..70e31e70e
--- /dev/null
+++ b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Car.java
@@ -0,0 +1,18 @@
+package com.iluwatar.abstractdocument.domain;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.iluwatar.abstractdocument.AbstractDocument;
+
+public class Car extends AbstractDocument implements HasModel, HasPrice, HasParts {
+
+	protected Car() {
+		super(new HashMap<String, Object>());
+	}
+	
+	protected Car(Map<String,Object> properties) {
+		super(properties);
+	}
+
+}
diff --git a/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasModel.java b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasModel.java
new file mode 100644
index 000000000..635f80abf
--- /dev/null
+++ b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasModel.java
@@ -0,0 +1,13 @@
+package com.iluwatar.abstractdocument.domain;
+
+import java.util.Optional;
+
+import com.iluwatar.abstractdocument.Document;
+
+public interface HasModel extends Document {
+	
+	default Optional<String> getModel() {
+		return Optional.ofNullable((String) get("model"));
+	}
+
+}
diff --git a/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasParts.java b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasParts.java
new file mode 100644
index 000000000..92c7dc7d9
--- /dev/null
+++ b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasParts.java
@@ -0,0 +1,13 @@
+package com.iluwatar.abstractdocument.domain;
+
+import java.util.stream.Stream;
+
+import com.iluwatar.abstractdocument.Document;
+
+public interface HasParts extends Document {
+	
+	default Stream<Part> getParts() {
+		return children("parts", Part::new);
+	}
+
+}
diff --git a/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasPrice.java b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasPrice.java
new file mode 100644
index 000000000..7c9e8e6a1
--- /dev/null
+++ b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasPrice.java
@@ -0,0 +1,13 @@
+package com.iluwatar.abstractdocument.domain;
+
+import java.util.Optional;
+
+import com.iluwatar.abstractdocument.Document;
+
+public interface HasPrice extends Document {
+	
+	default Optional<Number> getPartner() {
+		return Optional.ofNullable((Number) get("price"));
+	}
+
+}
diff --git a/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Part.java b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Part.java
new file mode 100644
index 000000000..fa252a7bc
--- /dev/null
+++ b/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Part.java
@@ -0,0 +1,18 @@
+package com.iluwatar.abstractdocument.domain;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.iluwatar.abstractdocument.AbstractDocument;
+
+public class Part extends AbstractDocument implements HasModel, HasPrice {
+
+	protected Part() {
+		super(new HashMap<String, Object>());
+	}
+	
+	protected Part(Map<String, Object> properties) {
+		super(properties);
+	}
+
+}