#919 - io.ebean package initial

src/main/java/io/ebeaninternal/server/expression/IdInExpression.java

@@ -0,0 +1,121 @@
+package io.ebeaninternal.server.expression;
+
+import io.ebeaninternal.api.HashQueryPlanBuilder;
+import io.ebeaninternal.api.ManyWhereJoins;
+import io.ebeaninternal.api.SpiExpression;
+import io.ebeaninternal.api.SpiExpressionRequest;
+import io.ebeaninternal.api.SpiExpressionValidation;
+import io.ebeaninternal.server.deploy.BeanDescriptor;
+import io.ebeaninternal.server.deploy.id.IdBinder;
+
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * Slightly redundant as Query.setId() ultimately also does the same job.
+ */
+public class IdInExpression extends NonPrepareExpression {
+
+  private final List<?> idList;
+
+  public IdInExpression(List<?> idList) {
+    this.idList = idList;
+  }
+
+  @Override
+  public String nestedPath(BeanDescriptor<?> desc) {
+    return null;
+  }
+
+  @Override
+  public void containsMany(BeanDescriptor<?> desc, ManyWhereJoins manyWhereJoin) {
+  }
+
+  @Override
+  public void writeDocQuery(DocQueryContext context) throws IOException {
+    context.writeIds(idList);
+  }
+
+  @Override
+  public void validate(SpiExpressionValidation validation) {
+    // always valid
+  }
+
+  @Override
+  public void addBindValues(SpiExpressionRequest request) {
+
+    // Bind the Id values including EmbeddedId and multiple Id
+
+    DefaultExpressionRequest r = (DefaultExpressionRequest) request;
+    BeanDescriptor<?> descriptor = r.getBeanDescriptor();
+    IdBinder idBinder = descriptor.getIdBinder();
+
+    for (Object anIdList : idList) {
+      idBinder.addIdInBindValue(request, anIdList);
+    }
+  }
+
+  /**
+   * For use with deleting non attached detail beans during stateless update.
+   */
+  public void addSqlNoAlias(SpiExpressionRequest request) {
+
+    DefaultExpressionRequest r = (DefaultExpressionRequest) request;
+    BeanDescriptor<?> descriptor = r.getBeanDescriptor();
+    IdBinder idBinder = descriptor.getIdBinder();
+
+    request.append(descriptor.getIdBinder().getBindIdInSql(null));
+    String inClause = idBinder.getIdInValueExpr(idList.size());
+    request.append(inClause);
+  }
+
+  @Override
+  public void addSql(SpiExpressionRequest request) {
+
+    DefaultExpressionRequest r = (DefaultExpressionRequest) request;
+    BeanDescriptor<?> descriptor = r.getBeanDescriptor();
+    IdBinder idBinder = descriptor.getIdBinder();
+
+    request.append(descriptor.getIdBinderInLHSSql());
+    String inClause = idBinder.getIdInValueExpr(idList.size());
+    request.append(inClause);
+  }
+
+  /**
+   * Incorporates the number of Id values to bind.
+   */
+  @Override
+  public void queryPlanHash(HashQueryPlanBuilder builder) {
+    builder.add(IdInExpression.class).add(idList.size());
+    builder.bind(idList.size());
+  }
+
+  @Override
+  public int queryBindHash() {
+    return idList.hashCode();
+  }
+
+  @Override
+  public boolean isSameByPlan(SpiExpression other) {
+    if (!(other instanceof IdInExpression)) {
+      return false;
+    }
+
+    IdInExpression that = (IdInExpression) other;
+    return this.idList.size() == that.idList.size();
+  }
+
+  @Override
+  public boolean isSameByBind(SpiExpression other) {
+    IdInExpression that = (IdInExpression) other;
+    if (this.idList.size() != that.idList.size()) {
+      return false;
+    }
+    for (int i = 0; i < idList.size(); i++) {
+      if (!idList.get(i).equals(that.idList.get(i))) {
+        return false;
+      }
+    }
+    return true;
+  }
+}