[
https://issues.apache.org/jira/browse/TINKERPOP-848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17428432#comment-17428432
]
ASF GitHub Bot commented on TINKERPOP-848:
------------------------------------------
amatiushkin commented on a change in pull request #1485:
URL: https://github.com/apache/tinkerpop/pull/1485#discussion_r727717241
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
`getElementText()` internally creates a `new StringBuilder()` per every
call and appends text (`getText()`) of a given element. Attempt to use non-text
elements would through various exceptions. I have check multiple
implementations of this method, and it seems concrete classes are null-safe.
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
For cases without value like below, there is no `default` value
therefore related events won't be emitted at all.
```xml
<data key="d_n"/>
```
My implementation could generate NPE in such cases, because
(`defaultValues.get(key)` && `defaultValue.length()`).
I'll add tests for that and fix it.
Btw, another use case with default tag alone without value should give
_empty string_ by default.
```
<key id="d_n" for="node" attr.name="modification" attr.type="string">
<default/>
</key>
```
I'll add it as well.
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
For cases without value like below, there is no `default` value
therefore related events won't be emitted at all.
```xml
<data key="d_n"/>
```
My implementation could generate NPE in such cases, because
(`defaultValues.get(key)` && `defaultValue.length()`).
I'll add tests for that and fix it.
Btw, another use case with default tag alone without value should give
_empty string_ by default.
```xml
<key id="d_n" for="node" attr.name="modification" attr.type="string">
<default/>
</key>
```
I'll add it as well.
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
This does not look right to me, key should be `d_n`. There is no key
with id="modification", therefore it should be an invalid XML document to begin
with.
```xml
<node id="6315">
<data key="modification"/>
</node>
```
That said, I will add this use cases as well just to see how it would
perform.
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
For cases without value like below, there is no `default` value
therefore related events won't be emitted at all.
```xml
<data key="d_n"/>
```
My implementation will generate **NPE** in such cases, because of
`defaultValues.get(key)` && `defaultValue.length()`.
I'll add tests for that and fix it.
Btw, another use case with default tag alone without value should give
_empty string_ by default.
```xml
<key id="d_n" for="node" attr.name="modification" attr.type="string">
<default/>
</key>
```
I'll add it as well.
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
For cases without value like below, there is no `default` value
therefore related events won't be emitted at all.
```xml
<data key="d_n"/>
```
⚠️ My implementation will generate **NPE** in such cases, because of
`defaultValues.get(key)` && `defaultValue.length()`.
I'll add tests for that and fix it.
Btw, another use case with default tag alone without value should give
_empty string_ by default.
```xml
<key id="d_n" for="node" attr.name="modification" attr.type="string">
<default/>
</key>
```
I'll add it as well.
##########
File path: gremlin-core/src/test/resources/graphml/sample.graphml.xml
##########
@@ -0,0 +1,367 @@
+<?xml version="1.0" encoding="UTF-8"?>
Review comment:
re: tinkerpop-modern.xml
I also plan to add edge case with CDATA/PDATA once I found any good example.
Does it make sense to make `gremlin-test` component to be a test dependency
for `grenmlin-core`?
I am not a big fun of duplicating things (including test), because it makes
future contributor to be aware to update modern dataset in few more places.
On the other hand, test dependency would add a little bit complexity to the
build process itself.
WDYT?
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
`getElementText()` internally creates a `new StringBuilder()` per every
call and appends text (`getText()`) of a given element. Attempt to use non-text
elements would throw various exceptions. I have check multiple implementations
of this method, and it seems concrete classes are null-safe.
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
`getElementText()` internally creates a `new StringBuilder()` per every
call and appends text (`getText()`) of a given element. Attempt to use non-text
elements would generate various exceptions. I have check multiple
implementations of this method, and it seems concrete classes are null-safe.
##########
File path:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLReader.java
##########
@@ -138,9 +143,11 @@ public void readGraph(final InputStream graphInputStream,
final Graph graphToWri
case GraphMLTokens.DATA:
final String key = reader.getAttributeValue(null,
GraphMLTokens.KEY);
final String dataAttributeName = keyIdMap.get(key);
+ final String defaultValue = defaultValues.get(key);
if (dataAttributeName != null) {
- final String value = reader.getElementText();
+ String elementValue = reader.getElementText();
+ final String value = elementValue.length() ==
0 && defaultValue.length() != 0 ? defaultValue : elementValue;
Review comment:
`getElementText()` internally creates a `new StringBuilder()` per every
call and appends text (`getText()`) of a given element. Attempt to use non-text
elements would generate various exceptions. I have check multiple
implementations of this method, and it seems concrete classes are null-safe for
this method, e.g. it always returns string.
##########
File path: gremlin-core/src/test/resources/graphml/sample.graphml.xml
##########
@@ -0,0 +1,367 @@
+<?xml version="1.0" encoding="UTF-8"?>
Review comment:
re: tinkerpop-modern.xml
I also plan to add edge case with CDATA/PDATA once I find any good example.
Does it make sense to make `gremlin-test` component to be a test dependency
for `grenmlin-core`?
I am not a big fun of duplicating things (including test), because it makes
future contributor to be aware to update modern dataset in few more places.
On the other hand, test dependency would add a little bit complexity to the
build process itself.
WDYT?
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> Support default attribute values in GraphMLReader
> -------------------------------------------------
>
> Key: TINKERPOP-848
> URL: https://issues.apache.org/jira/browse/TINKERPOP-848
> Project: TinkerPop
> Issue Type: Improvement
> Components: io
> Affects Versions: 3.0.2-incubating
> Reporter: Pavel Klinov
> Priority: Trivial
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> Looking at the code of GraphMLReader I see that it doesn't support default
> values of attributes, which are allowed by the GraphML spec. This is a bit
> annoying especially if the input defines default values for attributes which
> are used for mandatory data, e.g. edge labels.
> One small example is the sample graph at [1]. "d_e" is the label attribute
> with a default value. There're <edge .. /> elements w/o body later in the
> document and reading those will throw a "java.lang.IllegalArgumentException:
> Label can not be null" exception (if the vendor considers edge labels
> mandatory).
> I'd personaly squash both keyIdMap and keyTypesMap into a single String ->
> AttrInfo map, where AttrInfo would contain information about the data
> attribute name, type, and the default value.
> [1] http://www.eecs.wsu.edu/~yyao/DirectedStudyI/Datasets/AS/sample.graphml
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