Merge pull request #443 from mziccard/bigquery

Add InsertAllRequest, InsertAllResponse and model classes for table data

Author: aozarov

gcloud-java-bigquery/src/main/java/com/google/gcloud/bigquery/FieldValue.java

@@ -0,0 +1,266 @@
+/*
+ * Copyright 2015 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.gcloud.bigquery;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkState;
+
+import com.google.api.client.util.Data;
+import com.google.api.client.util.Lists;
+import com.google.common.base.Function;
+import com.google.common.base.MoreObjects;
+
+import java.io.Serializable;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * Google BigQuery Table Field Value class. Objects of this class represent values of a BigQuery
+ * Table Field. A list of values forms a table row. Tables rows can be gotten as the result of a
+ * query or when listing table data.
+ */
+public class FieldValue implements Serializable {
+
+  static final Function<Object, FieldValue> FROM_PB_FUNCTION = new Function<Object, FieldValue>() {
+    @Override
+    public FieldValue apply(Object pb) {
+      return FieldValue.fromPb(pb);
+    }
+  };
+  private static final int MICROSECONDS = 1000000;
+  private static final long serialVersionUID = 469098630191710061L;
+
+  private final Attribute attribute;
+  private final Object value;
+
+  /**
+   * The field value's attribute, giving information on the field's content type.
+   */
+  public enum Attribute {
+    /**
+     * A primitive field value. A {@code FieldValue} is primitive when the corresponding field has
+     * type {@link Field.Type#bool()}, {@link Field.Type#string()},
+     * {@link Field.Type#floatingPoint()}, {@link Field.Type#integer()},
+     * {@link Field.Type#timestamp()} or the value is set to {@code null}.
+     */
+    PRIMITIVE,
+
+    /**
+     * A {@code FieldValue} for a field with {@link Field.Mode#REPEATED} mode.
+     */
+    REPEATED,
+
+    /**
+     * A {@code FieldValue} for a field of type {@link Field.Type#record(Field...)}.
+     */
+    RECORD
+  }
+
+  FieldValue(Attribute attribute, Object value) {
+    this.attribute = attribute;
+    this.value = value;
+  }
+
+  /**
+   * Returns the attribute of this Field Value.
+   *
+   * @return {@link Attribute#PRIMITIVE} if the field is a primitive type
+   *     ({@link Field.Type#bool()}, {@link Field.Type#string()},
+   *     {@link Field.Type#floatingPoint()}, {@link Field.Type#integer()},
+   *     {@link Field.Type#timestamp()}) or is {@code null}. Returns {@link Attribute#REPEATED} if
+   *     the corresponding field has ({@link Field.Mode#REPEATED}) mode. Returns
+   *     {@link Attribute#RECORD} if the corresponding field is a
+   *     {@link Field.Type#record(Field...)} type.
+   */
+  public Attribute attribute() {
+    return attribute;
+  }
+
+  /**
+   * Returns {@code true} if this field's value is {@code null}, {@code false} otherwise.
+   */
+  public boolean isNull() {
+    return value == null;
+  }
+
+  /**
+   * Returns this field's value as an {@link Object}. If {@link #isNull()} is {@code true} this
+   * method returns {@code null}.
+   */
+  public Object value() {
+    return value;
+  }
+
+  /**
+   * Returns this field's value as a {@link String}. This method should only be used if the
+   * corresponding field has primitive type ({@link Field.Type#bool()}, {@link Field.Type#string()},
+   * {@link Field.Type#floatingPoint()}, {@link Field.Type#integer()},
+   * {@link Field.Type#timestamp()}).
+   *
+   * @throws ClassCastException if the field is not a primitive type
+   * @throws NullPointerException if {@link #isNull()} returns {@code true}
+   */
+  @SuppressWarnings("unchecked")
+  public String stringValue() {
+    checkNotNull(value);
+    return (String) value;
+  }
+
+  /**
+   * Returns this field's value as a {@code long}. This method should only be used if the
+   * corresponding field has {@link Field.Type#integer()} type.
+   *
+   * @throws ClassCastException if the field is not a primitive type
+   * @throws NumberFormatException if the field's value could not be converted to {@link Integer}
+   * @throws NullPointerException if {@link #isNull()} returns {@code true}
+   */
+  @SuppressWarnings("unchecked")
+  public long longValue() {
+    return Long.parseLong(stringValue());
+  }
+
+  /**
+   * Returns this field's value as a {@link Double}. This method should only be used if the
+   * corresponding field has {@link Field.Type#floatingPoint()} type.
+   *
+   * @throws ClassCastException if the field is not a primitive type
+   * @throws NumberFormatException if the field's value could not be converted to {@link Double}
+   * @throws NullPointerException if {@link #isNull()} returns {@code true}
+   */
+  @SuppressWarnings("unchecked")
+  public double doubleValue() {
+    return Double.parseDouble(stringValue());
+  }
+
+  /**
+   * Returns this field's value as a {@link Boolean}. This method should only be used if the
+   * corresponding field has {@link Field.Type#bool()} type.
+   *
+   * @throws ClassCastException if the field is not a primitive type
+   * @throws IllegalStateException if the field's value could not be converted to {@link Boolean}
+   * @throws NullPointerException if {@link #isNull()} returns {@code true}
+   */
+  @SuppressWarnings("unchecked")
+  public boolean booleanValue() {
+    String stringValue = stringValue();
+    checkState(stringValue.equalsIgnoreCase("true") || stringValue.equalsIgnoreCase("false"),
+        "Field value is not of boolean type");
+    return Boolean.parseBoolean(stringValue);
+  }
+
+  /**
+   * Returns this field's value as a {@code long}, representing a timestamp in microseconds since
+   * epoch (UNIX time). This method should only be used if the corresponding field has
+   * {@link Field.Type#timestamp()} type.
+   *
+   * @throws ClassCastException if the field is not a primitive type
+   * @throws NumberFormatException if the field's value could not be converted to {@link Long}
+   * @throws NullPointerException if {@link #isNull()} returns {@code true}
+   */
+  @SuppressWarnings("unchecked")
+  public long timestampValue() {
+    // timestamps are encoded in the format 1408452095.22 where the integer part is seconds since
+    // epoch (e.g. 1408452095.22 == 2014-08-19 07:41:35.220 -05:00)
+    return new Double(((Double.valueOf(stringValue())) * MICROSECONDS)).longValue();
+  }
+
+  /**
+   * Returns this field's value as a list of {@link FieldValue}. This method should only be used if
+   * the corresponding field has {@link Field.Mode#REPEATED} mode (i.e. {@link #attribute()} is
+   * {@link Attribute#REPEATED}).
+   *
+   * @throws ClassCastException if the field has not {@link Field.Mode#REPEATED} mode
+   * @throws NullPointerException if {@link #isNull()} returns {@code true}
+   */
+  @SuppressWarnings("unchecked")
+  public List<FieldValue> repeatedValue() {
+    checkNotNull(value);
+    return (List<FieldValue>) value;
+  }
+
+  /**
+   * Returns this field's value as a list of {@link FieldValue}. This method should only be used if
+   * the corresponding field has {@link Field.Type#record(Field...)} type (i.e. {@link #attribute()}
+   * is {@link Attribute#RECORD}).
+   *
+   * @throws ClassCastException if the field is not a {@link Field.Type#record(Field...)} type
+   * @throws NullPointerException if {@link #isNull()} returns {@code true}
+   */
+  @SuppressWarnings("unchecked")
+  public List<FieldValue> recordValue() {
+    checkNotNull(value);
+    return (List<FieldValue>) value;
+  }
+
+  @Override
+  public String toString() {
+    return MoreObjects.toStringHelper(this)
+        .add("attribute", attribute)
+        .add("value", value)
+        .toString();
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(attribute, value);
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (!(obj instanceof FieldValue)) {
+      return false;
+    }
+    FieldValue other = (FieldValue) obj;
+    return attribute == other.attribute && Objects.equals(value, other.value);
+  }
+
+  @SuppressWarnings("unchecked")
+  static FieldValue fromPb(Object cellPb) {
+    if (Data.isNull(cellPb)) {
+      return new FieldValue(Attribute.PRIMITIVE, null);
+    }
+    if (cellPb instanceof String) {
+      return new FieldValue(Attribute.PRIMITIVE, cellPb);
+    }
+    if (cellPb instanceof List) {
+      List<Object> cellsListPb = (List<Object>) cellPb;
+      List<FieldValue> repeatedCells = Lists.newArrayListWithCapacity(cellsListPb.size());
+      for (Object repeatedCellPb : cellsListPb) {
+        repeatedCells.add(FieldValue.fromPb(repeatedCellPb));
+      }
+      return new FieldValue(Attribute.REPEATED, repeatedCells);
+    }
+    if (cellPb instanceof Map) {
+      Map<String, Object> cellMapPb = (Map<String, Object>) cellPb;
+      if (cellMapPb.containsKey("f")) {
+        List<Object> cellsListPb = (List<Object>) cellMapPb.get("f");
+        List<FieldValue> recordCells = Lists.newArrayListWithCapacity(cellsListPb.size());
+        for (Object repeatedCellPb : cellsListPb) {
+          recordCells.add(FieldValue.fromPb(repeatedCellPb));
+        }
+        return new FieldValue(Attribute.RECORD, recordCells);
+      }
+      // This should never be the case when we are processing a first level table field (i.e. a
+      // row's field, not a record sub-field)
+      if (cellMapPb.containsKey("v")) {
+        return FieldValue.fromPb(cellMapPb.get("v"));
+      }
+    }
+    throw new AssertionError("Unexpected table cell format");
+  }
+}