#919 - io.ebean package initial

src/main/java/io/ebeaninternal/server/el/ElPropertyChainBuilder.java

@@ -0,0 +1,64 @@
+package io.ebeaninternal.server.el;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Utility object used to build a ElPropertyChain.
+ * <p>
+ * Builds a ElPropertyChain based on a chain of properties with dot separators.
+ * </p>
+ * <p>
+ * This can navigate an object graph based on dot notation such as
+ * order.customer.name.
+ * </p>
+ */
+public class ElPropertyChainBuilder {
+
+  private final String expression;
+
+  private final List<ElPropertyValue> chain = new ArrayList<>();
+
+  private final boolean embedded;
+
+  private boolean containsMany;
+
+  /**
+   * Create with the original expression.
+   */
+  public ElPropertyChainBuilder(boolean embedded, String expression) {
+    this.embedded = embedded;
+    this.expression = expression;
+  }
+
+  public boolean isContainsMany() {
+    return containsMany;
+  }
+
+  public void setContainsMany() {
+    this.containsMany = true;
+  }
+
+  public String getExpression() {
+    return expression;
+  }
+
+  /**
+   * Add a ElGetValue element to the chain.
+   */
+  public ElPropertyChainBuilder add(ElPropertyValue element) {
+    if (element == null) {
+      throw new NullPointerException("element null in expression " + expression);
+    }
+    chain.add(element);
+    return this;
+  }
+
+  /**
+   * Build the immutable ElGetChain from the build information.
+   */
+  public ElPropertyChain build() {
+    return new ElPropertyChain(containsMany, embedded, expression, chain.toArray(new ElPropertyValue[chain.size()]));
+  }
+
+}