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filter generator: create child object context when writing start obje…
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src/test/java/com/fasterxml/jackson/core/filter/GeneratorFiltering890Test.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| package com.fasterxml.jackson.core.filter; | ||
|
|
||
| import com.fasterxml.jackson.core.BaseTest; | ||
| import com.fasterxml.jackson.core.JsonGenerator; | ||
| import com.fasterxml.jackson.core.filter.TokenFilter.Inclusion; | ||
|
|
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| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
| import java.util.function.UnaryOperator; | ||
| import java.util.stream.Collectors; | ||
| import java.util.stream.Stream; | ||
|
|
||
| // for [core#890] | ||
| public class GeneratorFiltering890Test | ||
| extends BaseTest | ||
| { | ||
| private static final class OrTokenFilter extends TokenFilter { | ||
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| private final List<? extends TokenFilter> delegates; | ||
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| private OrTokenFilter(final List<? extends TokenFilter> delegates) { | ||
| this.delegates = delegates; | ||
| } | ||
|
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| static OrTokenFilter create(final Set<String> jsonPointers) { | ||
| return new OrTokenFilter(jsonPointers.stream().map(JsonPointerBasedFilter::new).collect(Collectors.toList())); | ||
| } | ||
|
|
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| @Override | ||
| public TokenFilter includeElement(final int index) { | ||
| return executeDelegates(delegate -> delegate.includeElement(index)); | ||
| } | ||
|
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| @Override | ||
| public TokenFilter includeProperty(final String name) { | ||
| return executeDelegates(delegate -> delegate.includeProperty(name)); | ||
| } | ||
|
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| @Override | ||
| public TokenFilter filterStartArray() { | ||
| return this; | ||
| } | ||
|
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| @Override | ||
| public TokenFilter filterStartObject() { | ||
| return this; | ||
| } | ||
|
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| private TokenFilter executeDelegates(final UnaryOperator<TokenFilter> operator) { | ||
| List<TokenFilter> nextDelegates = null; | ||
| for (final TokenFilter delegate : delegates) { | ||
| final TokenFilter next = operator.apply(delegate); | ||
| if (null == next) { | ||
| continue; | ||
| } | ||
| if (TokenFilter.INCLUDE_ALL == next) { | ||
| return TokenFilter.INCLUDE_ALL; | ||
| } | ||
|
|
||
| if (null == nextDelegates) { | ||
| nextDelegates = new ArrayList<>(delegates.size()); | ||
| } | ||
| nextDelegates.add(next); | ||
| } | ||
| return null == nextDelegates ? null : new OrTokenFilter(nextDelegates); | ||
| } | ||
| } | ||
|
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| public void testIssue809_singleProperty() throws Exception | ||
| { | ||
| // GIVEN | ||
| final Set<String> jsonPointers = Stream.of("/0/id").collect(Collectors.toSet()); | ||
|
|
||
| // WHEN | ||
| ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); | ||
| JsonGenerator g = new FilteringGeneratorDelegate(createGenerator(outputStream), OrTokenFilter.create(jsonPointers), Inclusion.INCLUDE_ALL_AND_PATH, true); | ||
|
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| g.writeStartArray(); | ||
| writeOuterObject(g, 1, "first", "a", "second", "b"); | ||
| writeOuterObject(g, 2, "third", "c", "fourth", "d"); | ||
| g.writeEndArray(); | ||
| g.flush(); | ||
| g.close(); | ||
| outputStream.close(); | ||
|
|
||
| // THEN | ||
| String json = outputStream.toString("US-ASCII"); | ||
| assertEquals("[{\"id\":1}]", json); | ||
| } | ||
|
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| public void testIssue809_twoProperties() throws Exception | ||
| { | ||
| // GIVEN | ||
| final Set<String> jsonPointers = Stream.of("/0/id", "/0/stuff/0/name").collect(Collectors.toSet()); | ||
|
|
||
| // WHEN | ||
| ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); | ||
| JsonGenerator g = new FilteringGeneratorDelegate(createGenerator(outputStream), OrTokenFilter.create(jsonPointers), Inclusion.INCLUDE_ALL_AND_PATH, true); | ||
|
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| g.writeStartArray(); | ||
| writeOuterObject(g, 1, "first", "a", "second", "b"); | ||
| writeOuterObject(g, 2, "third", "c", "fourth", "d"); | ||
| g.writeEndArray(); | ||
| g.flush(); | ||
| g.close(); | ||
| outputStream.close(); | ||
|
|
||
| // THEN | ||
| String json = outputStream.toString("US-ASCII"); | ||
| assertEquals("[{\"id\":1,\"stuff\":[{\"name\":\"first\"}]}]", json); | ||
| } | ||
|
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| private static void writeOuterObject(final JsonGenerator g, final int id, final String name1, final String type1, final String name2, final String type2) throws IOException | ||
| { | ||
| g.writeStartObject(); | ||
| g.writeFieldName("id"); | ||
| g.writeNumber(id); | ||
| g.writeFieldName("stuff"); | ||
| g.writeStartArray(); | ||
| writeInnerObject(g, name1, type1); | ||
| writeInnerObject(g, name2, type2); | ||
| g.writeEndArray(); | ||
| g.writeEndObject(); | ||
| } | ||
|
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| private static void writeInnerObject(final JsonGenerator g, final String name, final String type) throws IOException | ||
| { | ||
| g.writeStartObject(); | ||
| g.writeFieldName("name"); | ||
| g.writeString(name); | ||
| g.writeFieldName("type"); | ||
| g.writeString(type); | ||
| g.writeEndObject(); | ||
| } | ||
| } |
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