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BasicGeneratorFilteringTest.java
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BasicGeneratorFilteringTest.java
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package com.fasterxml.jackson.core.filter;
import java.io.*;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.filter.TokenFilter.Inclusion;
import com.fasterxml.jackson.core.io.SerializedString;
/**
* Low-level tests for explicit, hand-written tests for generator-side
* filtering.
*/
@SuppressWarnings("resource")
public class BasicGeneratorFilteringTest extends BaseTest
{
static final TokenFilter INCLUDE_ALL_SCALARS = new TokenFilter();
static class NameMatchFilter extends TokenFilter
{
private final Set<String> _names;
public NameMatchFilter(String... names) {
_names = new HashSet<String>(Arrays.asList(names));
}
@Override
public TokenFilter includeElement(int index) {
return this;
}
@Override
public TokenFilter includeProperty(String name) {
if (_names.contains(name)) {
return TokenFilter.INCLUDE_ALL;
}
return this;
}
@Override
protected boolean _includeScalar() { return false; }
}
static class NameExcludeFilter extends TokenFilter
{
private final Set<String> _names;
private final boolean _inclArrays;
public NameExcludeFilter(boolean inclArrays, String... names) {
_names = new HashSet<String>(Arrays.asList(names));
_inclArrays = inclArrays;
}
@Override
public TokenFilter includeElement(int index) {
return _inclArrays ? this : null;
}
@Override
public TokenFilter includeProperty(String name) {
if (_names.contains(name)) {
return null;
}
// but need to pass others provisionally
return this;
}
}
static class StrictNameMatchFilter extends TokenFilter
{
private final Set<String> _names;
public StrictNameMatchFilter(String... names) {
_names = new HashSet<String>(Arrays.asList(names));
}
@Override
public TokenFilter includeProperty(String name) {
if (_names.contains(name)) {
return TokenFilter.INCLUDE_ALL;
}
return null;
}
}
static class IndexMatchFilter extends TokenFilter
{
private final BitSet _indices;
public IndexMatchFilter(int... ixs) {
_indices = new BitSet();
for (int ix : ixs) {
_indices.set(ix);
}
}
@Override
public TokenFilter includeProperty(String name) {
return this;
}
@Override
public TokenFilter includeElement(int index) {
if (_indices.get(index)) {
return TokenFilter.INCLUDE_ALL;
}
return null;
}
@Override
protected boolean _includeScalar() { return false; }
}
static class NoArraysFilter extends TokenFilter
{
@Override
public TokenFilter filterStartArray() {
return null;
}
}
static class NoObjectsFilter extends TokenFilter
{
@Override
public TokenFilter filterStartObject() {
return null;
}
}
/*
/**********************************************************
/* Test methods
/**********************************************************
*/
private final JsonFactory JSON_F = new JsonFactory();
public void testNonFiltering() throws Exception
{
// First, verify non-filtering
StringWriter w = new StringWriter();
JsonGenerator gen = _createGenerator(w);
final String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':4},'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes(
"{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':4},'b':true}"),
w.toString());
}
public void testSingleMatchFilteringWithoutPath() throws Exception
{
StringWriter w = new StringWriter();
JsonGenerator gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameMatchFilter("value"),
Inclusion.ONLY_INCLUDE_ALL,
false // multipleMatches
);
final String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':4},'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
// 21-Apr-2015, tatu: note that there were plans to actually
// allow "immediate parent inclusion" for matches on property
// names. This behavior was NOT included in release however, so:
// assertEquals(aposToQuotes("{'value':3}"), w.toString());
assertEquals("3", w.toString());
}
public void testSingleMatchFilteringWithPath() throws Exception
{
StringWriter w = new StringWriter();
JsonGenerator origGen = _createGenerator(w);
NameMatchFilter filter = new NameMatchFilter("value");
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(origGen,
filter,
Inclusion.INCLUDE_ALL_AND_PATH,
false // multipleMatches
);
// Hmmh. Should we get access to eventual target?
assertSame(w, gen.getOutputTarget());
assertNotNull(gen.getFilterContext());
assertSame(filter, gen.getFilter());
final String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':4},'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'ob':{'value':3}}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
public void testSingleMatchFilteringWithPathSkippedArray() throws Exception
{
StringWriter w = new StringWriter();
JsonGenerator origGen = _createGenerator(w);
NameMatchFilter filter = new NameMatchFilter("value");
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(origGen,
filter,
Inclusion.INCLUDE_ALL_AND_PATH,
false // multipleMatches
);
// Hmmh. Should we get access to eventual target?
assertSame(w, gen.getOutputTarget());
assertNotNull(gen.getFilterContext());
assertSame(filter, gen.getFilter());
final String JSON = "{'array':[1,[2,3]],'ob':[{'value':'bar'}],'b':{'foo':[1,'foo']}}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'ob':[{'value':'bar'}]}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
// Alternative take, using slightly different calls for FIELD_NAME, START_ARRAY
public void testSingleMatchFilteringWithPathAlternate1() throws Exception {
_testSingleMatchFilteringWithPathAlternate1(false);
_testSingleMatchFilteringWithPathAlternate1(true);
}
private void _testSingleMatchFilteringWithPathAlternate1(boolean exclude) throws Exception
{
StringWriter w = new StringWriter();
TokenFilter tf = exclude
? new NameExcludeFilter(true, "value", "a")
: new NameMatchFilter("value");
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
tf,
Inclusion.INCLUDE_ALL_AND_PATH,
true // multipleMatches
);
//final String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':[3],'value2':'foo'},'b':true}";
gen.writeStartObject();
gen.writeFieldName(new SerializedString("a"));
gen.writeNumber(123);
gen.writeFieldName("array");
gen.writeStartArray(2);
gen.writeNumber("1");
gen.writeNumber((short) 2);
gen.writeEndArray();
gen.writeFieldName(new SerializedString("ob"));
gen.writeStartObject();
gen.writeNumberField("value0", 2);
gen.writeFieldName(new SerializedString("value"));
gen.writeStartArray(1);
gen.writeString(new SerializedString("x")); // just to vary generation method
gen.writeEndArray();
gen.writeStringField("value2", "foo");
gen.writeEndObject();
gen.writeBooleanField("b", true);
gen.writeEndObject();
gen.close();
if (exclude) {
assertEquals(aposToQuotes(
"{'array':[1,2],'ob':{'value0':2,'value2':'foo'},'b':true}"
), w.toString());
assertEquals(5, gen.getMatchCount());
} else {
assertEquals(aposToQuotes("{'ob':{'value':['x']}}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
}
public void testSingleMatchFilteringWithPathRawBinary() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameMatchFilter("array"),
Inclusion.INCLUDE_ALL_AND_PATH,
false // multipleMatches
);
//final String JSON = "{'header':['ENCODED',raw],'array':['base64stuff',1,2,3,4,5,6.25,7.5],'extra':[1,2,3,4,5,6.25,7.5]}";
gen.writeStartObject();
gen.writeFieldName("header");
gen.writeStartArray();
gen.writeBinary(new byte[] { 1 });
gen.writeRawValue(new SerializedString("1"));
gen.writeRawValue("2");
gen.writeEndArray();
gen.writeFieldName("array");
gen.writeStartArray();
gen.writeBinary(new byte[] { 1 });
gen.writeNumber((short) 1);
gen.writeNumber((int) 2);
gen.writeNumber((long) 3);
gen.writeNumber(BigInteger.valueOf(4));
gen.writeRaw(" ");
gen.writeNumber(new BigDecimal("5.0"));
gen.writeRaw(new SerializedString(" /*x*/"));
gen.writeNumber(6.25f);
gen.writeNumber(7.5);
gen.writeEndArray();
gen.writeArrayFieldStart("extra");
gen.writeNumber((short) 1);
gen.writeNumber((int) 2);
gen.writeNumber((long) 3);
gen.writeNumber(BigInteger.valueOf(4));
gen.writeNumber(new BigDecimal("5.0"));
gen.writeNumber(6.25f);
gen.writeNumber(7.5);
gen.writeEndArray();
gen.writeEndObject();
gen.close();
assertEquals(aposToQuotes("{'array':['AQ==',1,2,3,4 ,5.0 /*x*/,6.25,7.5]}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
public void testMultipleMatchFilteringWithPath1() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameMatchFilter("value0", "value2"),
Inclusion.INCLUDE_ALL_AND_PATH, true /* multipleMatches */ );
final String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':4},'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'ob':{'value0':2,'value2':4}}"), w.toString());
assertEquals(2, gen.getMatchCount());
// also try with alternate filter implementation: first including arrays
w = new StringWriter();
gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameExcludeFilter(true, "ob"), Inclusion.INCLUDE_ALL_AND_PATH, true);
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'a':123,'array':[1,2],'b':true}"), w.toString());
// then excluding them
w = new StringWriter();
gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameExcludeFilter(false, "ob"), Inclusion.INCLUDE_ALL_AND_PATH, true);
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'a':123,'b':true}"), w.toString());
}
public void testMultipleMatchFilteringWithPath2() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameMatchFilter("array", "b", "value"),
Inclusion.INCLUDE_ALL_AND_PATH, true);
final String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':4},'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'array':[1,2],'ob':{'value':3},'b':true}"), w.toString());
assertEquals(3, gen.getMatchCount());
}
public void testMultipleMatchFilteringWithPath3() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameMatchFilter("value"),
Inclusion.INCLUDE_ALL_AND_PATH, true);
final String JSON = "{'root':{'a0':true,'a':{'value':3},'b':{'value':'abc'}},'b0':false}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'root':{'a':{'value':3},'b':{'value':'abc'}}}"), w.toString());
assertEquals(2, gen.getMatchCount());
}
public void testNoMatchFiltering1() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new NameMatchFilter("invalid"),
Inclusion.INCLUDE_NON_NULL, true);
final String JSON = "{'root':{'a0':true,'b':{'value':4}},'b0':false}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'root':{'b':{}}}"), w.toString());
assertEquals(0, gen.getMatchCount());
}
public void testNoMatchFiltering2() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new NameMatchFilter("invalid"),
Inclusion.INCLUDE_NON_NULL, true);
final String object = "{'root':{'a0':true,'b':{'value':4}},'b0':false}";
final String JSON = String.format("[%s,%s,%s]", object, object, object);
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("[{'root':{'b':{}}},{'root':{'b':{}}},{'root':{'b':{}}}]"), w.toString());
assertEquals(0, gen.getMatchCount());
}
public void testNoMatchFiltering3() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new NameMatchFilter("invalid"),
Inclusion.INCLUDE_NON_NULL, true);
final String object = "{'root':{'a0':true,'b':{'value':4}},'b0':false}";
final String JSON = String.format("[[%s],[%s],[%s]]", object, object, object);
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("[[{'root':{'b':{}}}],[{'root':{'b':{}}}],[{'root':{'b':{}}}]]"), w.toString());
assertEquals(0, gen.getMatchCount());
}
public void testNoMatchFiltering4() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new StrictNameMatchFilter("invalid"),
Inclusion.INCLUDE_NON_NULL, true);
final String JSON = "{'root':{'a0':true,'a':{'value':3},'b':{'value':4}},'b0':false}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{}"), w.toString());
assertEquals(0, gen.getMatchCount());
}
public void testNoMatchFiltering5() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new StrictNameMatchFilter("invalid"),
Inclusion.INCLUDE_NON_NULL, true);
final String object = "{'root':{'a0':true,'b':{'value':4}},'b0':false}";
final String JSON = String.format("[%s,%s,%s]", object, object, object);
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("[{},{},{}]"), w.toString());
assertEquals(0, gen.getMatchCount());
}
public void testNoMatchFiltering6() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new StrictNameMatchFilter("invalid"),
Inclusion.INCLUDE_NON_NULL, true);
final String object = "{'root':{'a0':true,'b':{'value':4}},'b0':false}";
final String JSON = String.format("[[%s],[%s],[%s]]", object, object, object);
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("[[{}],[{}],[{}]]"), w.toString());
assertEquals(0, gen.getMatchCount());
}
public void testValueOmitsFieldName1() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new NoArraysFilter(),
Inclusion.INCLUDE_NON_NULL, true);
final String JSON = "{'root':['a'],'b0':false}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'b0':false}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
public void testMultipleMatchFilteringWithPath4() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
new NameMatchFilter("b0"),
Inclusion.INCLUDE_ALL_AND_PATH, true);
final String JSON = "{'root':{'a0':true,'a':{'value':3},'b':{'value':'abc'}},'b0':false}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'b0':false}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
public void testValueOmitsFieldName2() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(JSON_F.createGenerator(w),
new NoObjectsFilter(),
Inclusion.INCLUDE_NON_NULL, true);
final String JSON = "['a',{'root':{'b':{'value':4}},'b0':false}]";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("['a']"), w.toString());
assertEquals(1, gen.getMatchCount());
}
public void testIndexMatchWithPath1() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
new IndexMatchFilter(1),
Inclusion.INCLUDE_ALL_AND_PATH, true);
final String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':'abc'},'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'array':[2]}"), w.toString());
w = new StringWriter();
gen = new FilteringGeneratorDelegate(_createGenerator(w),
new IndexMatchFilter(0),
Inclusion.INCLUDE_ALL_AND_PATH, true);
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'array':[1]}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
public void testIndexMatchWithPath2() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
new IndexMatchFilter(0,1),
Inclusion.INCLUDE_ALL_AND_PATH, true);
String JSON = "{'a':123,'array':[1,2],'ob':{'value0':2,'value':3,'value2':4},'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'array':[1,2]}"), w.toString());
assertEquals(2, gen.getMatchCount());
gen.close();
w = new StringWriter();
gen = new FilteringGeneratorDelegate(_createGenerator(w),
new IndexMatchFilter(1, 3, 5),
Inclusion.INCLUDE_ALL_AND_PATH, true);
JSON = "{'a':123,'misc':[1,2, null, true, false, 'abc', 123],'ob':null,'b':true}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'misc':[2,true,'abc']}"), w.toString());
assertEquals(3, gen.getMatchCount());
w = new StringWriter();
gen = new FilteringGeneratorDelegate(_createGenerator(w),
new IndexMatchFilter(2,6),
Inclusion.INCLUDE_ALL_AND_PATH, true);
JSON = "{'misc':[1,2, null, 0.25, false, 'abc', 11234567890]}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'misc':[null,11234567890]}"), w.toString());
assertEquals(2, gen.getMatchCount());
w = new StringWriter();
gen = new FilteringGeneratorDelegate(_createGenerator(w),
new IndexMatchFilter(1),
Inclusion.INCLUDE_ALL_AND_PATH, true);
JSON = "{'misc':[1,0.25,11234567890]}";
writeJsonDoc(JSON_F, JSON, gen);
assertEquals(aposToQuotes("{'misc':[0.25]}"), w.toString());
assertEquals(1, gen.getMatchCount());
}
public void testWriteStartObjectWithObject() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
TokenFilter.INCLUDE_ALL,
Inclusion.INCLUDE_ALL_AND_PATH, true);
String value = "val";
gen.writeStartObject(new Object(), 2);
gen.writeFieldName("field1");
{
gen.writeStartObject(value);
gen.writeEndObject();
}
gen.writeFieldName("field2");
gen.writeNumber(new BigDecimal("1.0"));
gen.writeEndObject();
gen.close();
assertEquals(aposToQuotes("{'field1':{},'field2':1.0}"), w.toString());
}
// [core#580]
public void testRawValueDelegationWithArray() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
TokenFilter.INCLUDE_ALL, Inclusion.INCLUDE_ALL_AND_PATH, true);
gen.writeStartArray();
gen.writeRawValue(new char[] { '1'}, 0, 1);
gen.writeRawValue("123", 2, 1);
gen.writeRaw(',');
gen.writeRaw("/* comment");
gen.writeRaw("... */".toCharArray(), 3, 3);
gen.writeRaw(" ,42", 1, 3);
gen.writeEndArray();
gen.close();
assertEquals("[1,3,/* comment */,42]", w.toString());
}
// [core#588]
public void testRawValueDelegationWithObject() throws Exception
{
StringWriter w = new StringWriter();
FilteringGeneratorDelegate gen = new FilteringGeneratorDelegate(_createGenerator(w),
TokenFilter.INCLUDE_ALL, Inclusion.INCLUDE_ALL_AND_PATH, true);
gen.writeStartObject();
gen.writeNumberField("f1", 1);
gen.writeFieldName("f2");
gen.writeRawValue(new char[]{'1', '2', '.', '3', '-'}, 0, 4);
gen.writeNumberField("f3", 3);
gen.writeEndObject();
gen.close();
assertEquals(aposToQuotes("{'f1':1,'f2':12.3,'f3':3}"), w.toString());
}
private JsonGenerator _createGenerator(Writer w) throws IOException {
return JSON_F.createGenerator(w);
}
}