1 files changed, 119 insertions, 0 deletions
diff --git a/java/com/google/gerrit/elasticsearch/ElasticMapping.java b/java/com/google/gerrit/elasticsearch/ElasticMapping.java
new file mode 100644
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+++ b/java/com/google/gerrit/elasticsearch/ElasticMapping.java
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+// Copyright (C) 2016 The Android Open Source Project
+//
+// 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.gerrit.elasticsearch;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.gerrit.index.FieldDef;
+import com.google.gerrit.index.FieldType;
+import com.google.gerrit.index.Schema;
+import java.util.Map;
+
+class ElasticMapping {
+  static MappingProperties createMapping(Schema<?> schema, ElasticQueryAdapter adapter) {
+    ElasticMapping.Builder mapping = new ElasticMapping.Builder(adapter);
+    for (FieldDef<?, ?> field : schema.getFields().values()) {
+      String name = field.getName();
+      FieldType<?> fieldType = field.getType();
+      if (fieldType == FieldType.EXACT) {
+        mapping.addExactField(name);
+      } else if (fieldType == FieldType.TIMESTAMP) {
+        mapping.addTimestamp(name);
+      } else if (fieldType == FieldType.INTEGER
+          || fieldType == FieldType.INTEGER_RANGE
+          || fieldType == FieldType.LONG) {
+        mapping.addNumber(name);
+      } else if (fieldType == FieldType.FULL_TEXT) {
+        mapping.addStringWithAnalyzer(name);
+      } else if (fieldType == FieldType.PREFIX || fieldType == FieldType.STORED_ONLY) {
+        mapping.addString(name);
+      } else {
+        throw new IllegalStateException("Unsupported field type: " + fieldType.getName());
+      }
+    }
+    return mapping.build();
+  }
+
+  static class Builder {
+    private final ElasticQueryAdapter adapter;
+    private final ImmutableMap.Builder<String, FieldProperties> fields =
+        new ImmutableMap.Builder<>();
+
+    Builder(ElasticQueryAdapter adapter) {
+      this.adapter = adapter;
+    }
+
+    MappingProperties build() {
+      MappingProperties properties = new MappingProperties();
+      properties.properties = fields.build();
+      return properties;
+    }
+
+    Builder addExactField(String name) {
+      FieldProperties key = new FieldProperties(adapter.exactFieldType());
+      key.index = adapter.indexProperty();
+      FieldProperties properties;
+      properties = new FieldProperties(adapter.exactFieldType());
+      properties.fields = ImmutableMap.of("key", key);
+      fields.put(name, properties);
+      return this;
+    }
+
+    Builder addTimestamp(String name) {
+      FieldProperties properties = new FieldProperties("date");
+      properties.type = "date";
+      properties.format = "dateOptionalTime";
+      fields.put(name, properties);
+      return this;
+    }
+
+    Builder addNumber(String name) {
+      fields.put(name, new FieldProperties("long"));
+      return this;
+    }
+
+    Builder addString(String name) {
+      fields.put(name, new FieldProperties(adapter.stringFieldType()));
+      return this;
+    }
+
+    Builder addStringWithAnalyzer(String name) {
+      FieldProperties key = new FieldProperties(adapter.stringFieldType());
+      key.analyzer = "custom_with_char_filter";
+      fields.put(name, key);
+      return this;
+    }
+
+    Builder add(String name, String type) {
+      fields.put(name, new FieldProperties(type));
+      return this;
+    }
+  }
+
+  static class MappingProperties {
+    Map<String, FieldProperties> properties;
+  }
+
+  static class FieldProperties {
+    String type;
+    String index;
+    String format;
+    String analyzer;
+    Map<String, FieldProperties> fields;
+
+    FieldProperties(String type) {
+      this.type = type;
+    }
+  }
+}