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implement #271 Change-Id: Ib618c45bc6169a0fb7632dbbf0fb29b7ee0a08e3
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93 changes: 93 additions & 0 deletions
93
hugegraph-core/src/main/java/com/baidu/hugegraph/backend/query/IdPrefixQuery.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| /* | ||
| * Copyright 2017 HugeGraph Authors | ||
| * | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with this | ||
| * work for additional information regarding copyright ownership. The ASF | ||
| * 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. | ||
| */ | ||
|
|
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| package com.baidu.hugegraph.backend.query; | ||
|
|
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| import com.baidu.hugegraph.backend.id.Id; | ||
| import com.baidu.hugegraph.structure.HugeElement; | ||
| import com.baidu.hugegraph.type.HugeType; | ||
| import com.baidu.hugegraph.util.Bytes; | ||
| import com.baidu.hugegraph.util.E; | ||
|
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| public class IdPrefixQuery extends Query { | ||
|
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| private final Id start; | ||
| private final boolean inclusiveStart; | ||
| private final Id prefix; | ||
|
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| public IdPrefixQuery(HugeType resultType, Id prefix) { | ||
| this(resultType, null, prefix, true, prefix); | ||
| } | ||
|
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| public IdPrefixQuery(Query originQuery, Id prefix) { | ||
| this(originQuery.resultType(), originQuery, prefix, true, prefix); | ||
| } | ||
|
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| public IdPrefixQuery(Query originQuery, | ||
| Id start, boolean inclusive, Id prefix) { | ||
| this(originQuery.resultType(), originQuery, start, inclusive, prefix); | ||
| } | ||
|
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| public IdPrefixQuery(HugeType resultType, Query originQuery, | ||
| Id start, boolean inclusive, Id prefix) { | ||
| super(resultType, originQuery); | ||
| E.checkArgumentNotNull(start, "The start parameter can't be null"); | ||
| this.start = start; | ||
| this.inclusiveStart = inclusive; | ||
| this.prefix = prefix; | ||
| } | ||
|
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| public Id start() { | ||
| return this.start; | ||
| } | ||
|
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| public boolean inclusiveStart() { | ||
| return this.inclusiveStart; | ||
| } | ||
|
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| public Id prefix() { | ||
| return this.prefix; | ||
| } | ||
|
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| @Override | ||
| public boolean empty() { | ||
| return false; | ||
| } | ||
|
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| @Override | ||
| public boolean test(HugeElement element) { | ||
| byte[] elem = element.id().asBytes(); | ||
| int cmp = Bytes.compare(elem, this.start.asBytes()); | ||
| boolean matchedStart = this.inclusiveStart ? cmp >= 0 : cmp > 0; | ||
| boolean matchedPrefix = Bytes.prefixWith(elem, this.prefix.asBytes()); | ||
| return matchedStart && matchedPrefix; | ||
| } | ||
|
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| @Override | ||
| public IdPrefixQuery copy() { | ||
| return (IdPrefixQuery) super.copy(); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| return String.format("%s where id prefix with %s and start with %s(%s)", | ||
| super.toString(), this.prefix, this.start, | ||
| this.inclusiveStart ? "inclusive" : "exclusive"); | ||
| } | ||
| } |
104 changes: 104 additions & 0 deletions
104
hugegraph-core/src/main/java/com/baidu/hugegraph/backend/query/IdRangeQuery.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| /* | ||
| * Copyright 2017 HugeGraph Authors | ||
| * | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with this | ||
| * work for additional information regarding copyright ownership. The ASF | ||
| * 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 com.baidu.hugegraph.backend.query; | ||
|
|
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| import com.baidu.hugegraph.backend.id.Id; | ||
| import com.baidu.hugegraph.structure.HugeElement; | ||
| import com.baidu.hugegraph.type.HugeType; | ||
| import com.baidu.hugegraph.util.Bytes; | ||
| import com.baidu.hugegraph.util.E; | ||
|
|
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| public class IdRangeQuery extends Query { | ||
|
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| private final Id start; | ||
| private final Id end; | ||
| private final boolean inclusiveStart; | ||
| private final boolean inclusiveEnd; | ||
|
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| public IdRangeQuery(HugeType resultType, Id start, Id end) { | ||
| this(resultType, null, start, end); | ||
| } | ||
|
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| public IdRangeQuery(HugeType resultType, Query originQuery, | ||
| Id start, Id end) { | ||
| this(resultType, originQuery, start, true, end, false); | ||
| } | ||
|
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| public IdRangeQuery(Query originQuery, | ||
| Id start, boolean inclusiveStart, | ||
| Id end, boolean inclusiveEnd) { | ||
| this(originQuery.resultType(), originQuery, | ||
| start, inclusiveStart, end, inclusiveEnd); | ||
| } | ||
|
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| public IdRangeQuery(HugeType resultType, Query originQuery, | ||
| Id start, boolean inclusiveStart, | ||
| Id end, boolean inclusiveEnd) { | ||
| super(resultType, originQuery); | ||
| E.checkArgumentNotNull(start, "The start parameter can't be null"); | ||
| this.start = start; | ||
| this.end = end; | ||
| this.inclusiveStart = inclusiveStart; | ||
| this.inclusiveEnd = inclusiveEnd; | ||
| } | ||
|
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| public Id start() { | ||
| return this.start; | ||
| } | ||
|
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| public Id end() { | ||
| return this.end; | ||
| } | ||
|
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| public boolean inclusiveStart() { | ||
| return this.inclusiveStart; | ||
| } | ||
|
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| public boolean inclusiveEnd() { | ||
| return this.inclusiveEnd; | ||
| } | ||
|
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| @Override | ||
| public boolean empty() { | ||
| return false; | ||
| } | ||
|
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| @Override | ||
| public boolean test(HugeElement element) { | ||
| int cmp1 = Bytes.compare(element.id().asBytes(), this.start.asBytes()); | ||
| int cmp2 = Bytes.compare(element.id().asBytes(), this.end.asBytes()); | ||
| return (this.inclusiveStart ? cmp1 >= 0 : cmp1 > 0) && | ||
| (this.inclusiveEnd ? cmp2 <= 0 : cmp2 < 0); | ||
| } | ||
|
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| @Override | ||
| public IdRangeQuery copy() { | ||
| return (IdRangeQuery) super.copy(); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| return String.format("%s where id in range %s%s,%s%s", | ||
| super.toString(), | ||
| this.inclusiveStart ? "[" : "(", | ||
| this.start, this.end, | ||
| this.inclusiveEnd ? "]" : ")"); | ||
| } | ||
| } |
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