1 files changed, 104 insertions, 0 deletions
diff --git a/core/src/main/java/org/elasticsearch/index/query/ParentIdQueryBuilder.java b/core/src/main/java/org/elasticsearch/index/query/ParentIdQueryBuilder.java
new file mode 100644
index 0000000000..f9bd7623f3
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+++ b/core/src/main/java/org/elasticsearch/index/query/ParentIdQueryBuilder.java
@@ -0,0 +1,104 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.index.query;
+
+import org.apache.lucene.search.DocValuesTermsQuery;
+import org.apache.lucene.search.Query;
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.index.mapper.DocumentMapper;
+import org.elasticsearch.index.mapper.internal.ParentFieldMapper;
+
+import java.io.IOException;
+import java.util.Objects;
+
+public final class ParentIdQueryBuilder extends AbstractQueryBuilder<ParentIdQueryBuilder> {
+
+    public static final String NAME = "parent_id";
+    static final ParentIdQueryBuilder PROTO = new ParentIdQueryBuilder(null, null);
+
+    private final String type;
+    private final String id;
+
+    public ParentIdQueryBuilder(String type, String id) {
+        this.type = type;
+        this.id = id;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    @Override
+    protected void doXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject(NAME);
+        builder.field(ParentIdQueryParser.TYPE_FIELD.getPreferredName(), type);
+        builder.field(ParentIdQueryParser.ID_FIELD.getPreferredName(), id);
+        printBoostAndQueryName(builder);
+        builder.endObject();
+    }
+
+    @Override
+    protected Query doToQuery(QueryShardContext context) throws IOException {
+        DocumentMapper childDocMapper = context.getMapperService().documentMapper(type);
+        if (childDocMapper == null) {
+            throw new QueryShardException(context, "[" + NAME + "] no mapping found for type [" + type + "]");
+        }
+        ParentFieldMapper parentFieldMapper = childDocMapper.parentFieldMapper();
+        if (parentFieldMapper.active() == false) {
+            throw new QueryShardException(context, "[" + NAME + "] _parent field has no parent type configured");
+        }
+        String fieldName = ParentFieldMapper.joinField(parentFieldMapper.type());
+        return new DocValuesTermsQuery(fieldName, id);
+    }
+
+    @Override
+    protected ParentIdQueryBuilder doReadFrom(StreamInput in) throws IOException {
+        String type = in.readString();
+        String id = in.readString();
+        return new ParentIdQueryBuilder(type, id);
+    }
+
+    @Override
+    protected void doWriteTo(StreamOutput out) throws IOException {
+        out.writeString(type);
+        out.writeString(id);
+    }
+
+    @Override
+    protected boolean doEquals(ParentIdQueryBuilder that) {
+        return Objects.equals(type, that.type) && Objects.equals(id, that.id);
+    }
+
+    @Override
+    protected int doHashCode() {
+        return Objects.hash(type, id);
+    }
+
+    @Override
+    public String getWriteableName() {
+        return NAME;
+    }
+}