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Merge pull request #488 from MarcP04/master 

Add support of new operators ANYOF and NONEOF
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kallestenflo 6 years ago committed by GitHub
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6 changed files with 200 additions and 24 deletions
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  1. 44
      README.md
  2. 50
      json-path/src/main/java/com/jayway/jsonpath/Criteria.java
  3. 75
      json-path/src/main/java/com/jayway/jsonpath/internal/filter/EvaluatorFactory.java
  4. 4
      json-path/src/main/java/com/jayway/jsonpath/internal/filter/RelationalOperator.java
  5. 20
      json-path/src/test/java/com/jayway/jsonpath/FilterParseTest.java
  6. 31
      json-path/src/test/java/com/jayway/jsonpath/FilterTest.java

44
README.md
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@ -77,13 +77,13 @@ Functions
Functions can be invoked at the tail end of a path - the input to a function is the output of the path expression.
The function output is dictated by the function itself.
| Function | Description | Output |
| :------------------------ | :----------------------------------------------------------------- |-----------|
| min() | Provides the min value of an array of numbers | Double |
| max() | Provides the max value of an array of numbers | Double |
| avg() | Provides the average value of an array of numbers | Double |
| stddev() | Provides the standard deviation value of an array of numbers | Double |
| length() | Provides the length of an array | Integer |
| Function | Description | Output |
| :------------------------ | :------------------------------------------------------------------ |-----------|
| min() | Provides the min value of an array of numbers | Double |
| max() | Provides the max value of an array of numbers | Double |
| avg() | Provides the average value of an array of numbers | Double |
| stddev() | Provides the standard deviation value of an array of numbers | Double |
| length() | Provides the length of an array | Integer |
Filter Operators
@ -91,20 +91,22 @@ Filter Operators
Filters are logical expressions used to filter arrays. A typical filter would be `[?(@.age > 18)]` where `@` represents the current item being processed. More complex filters can be created with logical operators `&&` and `||`. String literals must be enclosed by single or double quotes (`[?(@.color == 'blue')]` or `[?(@.color == "blue")]`).
| Operator | Description |
| :----------------------- | :---------------------------------------------------------------- |
| == | left is equal to right (note that 1 is not equal to '1') |
| != | left is not equal to right |
| < | left is less than right |
| <= | left is less or equal to right |
| > | left is greater than right |
| >= | left is greater than or equal to right |
| =~ | left matches regular expression [?(@.name =~ /foo.*?/i)] |
| in | left exists in right [?(@.size in ['S', 'M'])] |
| nin | left does not exists in right |
| subsetof | left is a subset of right [?(@.sizes subsetof ['S', 'M', 'L'])] |
| size | size of left (array or string) should match right |
| empty | left (array or string) should be empty |
| Operator | Description |
| :----------------------- | :-------------------------------------------------------------------- |
| == | left is equal to right (note that 1 is not equal to '1') |
| != | left is not equal to right |
| < | left is less than right |
| <= | left is less or equal to right |
| > | left is greater than right |
| >= | left is greater than or equal to right |
| =~ | left matches regular expression [?(@.name =~ /foo.*?/i)] |
| in | left exists in right [?(@.size in ['S', 'M'])] |
| nin | left does not exists in right |
| subsetof | left is a subset of right [?(@.sizes subsetof ['S', 'M', 'L'])] |
| anyof | left has an intersection with right [?(@.sizes anyof ['M', 'L'])] |
| noneof | left has no intersection with right [?(@.sizes noneof ['M', 'L'])] |
| size | size of left (array or string) should match right |
| empty | left (array or string) should be empty |
Path Examples

50
json-path/src/main/java/com/jayway/jsonpath/Criteria.java
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@ -296,6 +296,56 @@ public class Criteria implements Predicate {
return this;
}
/**
* The <code>anyof</code> operator selects objects for which the specified field is
* an array that contain at least an element in the specified array.
*
* @param o the values to match against
* @return the criteria
*/
public Criteria anyof(Object... o) {
return subsetof(Arrays.asList(o));
}
/**
* The <code>anyof</code> operator selects objects for which the specified field is
* an array that contain at least an element in the specified array.
*
* @param c the values to match against
* @return the criteria
*/
public Criteria anyof(Collection<?> c) {
notNull(c, "collection can not be null");
this.criteriaType = RelationalOperator.ANYOF;
this.right = new ValueNode.ValueListNode(c);
return this;
}
/**
* The <code>noneof</code> operator selects objects for which the specified field is
* an array that does not contain any of the elements of the specified array.
*
* @param o the values to match against
* @return the criteria
*/
public Criteria noneof(Object... o) {
return subsetof(Arrays.asList(o));
}
/**
* The <code>noneof</code> operator selects objects for which the specified field is
* an array that does not contain any of the elements of the specified array.
*
* @param c the values to match against
* @return the criteria
*/
public Criteria noneof(Collection<?> c) {
notNull(c, "collection can not be null");
this.criteriaType = RelationalOperator.NONEOF;
this.right = new ValueNode.ValueListNode(c);
return this;
}
/**
* The <code>all</code> operator is similar to $in, but instead of matching any value
* in the specified array all values in the array must be matched.

75
json-path/src/main/java/com/jayway/jsonpath/internal/filter/EvaluatorFactory.java
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@ -31,6 +31,8 @@ public class EvaluatorFactory {
evaluators.put(RelationalOperator.MATCHES, new PredicateMatchEvaluator());
evaluators.put(RelationalOperator.TYPE, new TypeEvaluator());
evaluators.put(RelationalOperator.SUBSETOF, new SubsetOfEvaluator());
evaluators.put(RelationalOperator.ANYOF, new AnyOfEvaluator());
evaluators.put(RelationalOperator.NONEOF, new NoneOfEvaluator());
}
public static Evaluator createEvaluator(RelationalOperator operator){
@ -296,4 +298,77 @@ public class EvaluatorFactory {
}
}
private static class AnyOfEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
ValueNode.ValueListNode rightValueListNode;
if (right.isJsonNode()) {
ValueNode vn = right.asJsonNode().asValueListNode(ctx);
if (vn.isUndefinedNode()) {
return false;
} else {
rightValueListNode = vn.asValueListNode();
}
} else {
rightValueListNode = right.asValueListNode();
}
ValueNode.ValueListNode leftValueListNode;
if (left.isJsonNode()) {
ValueNode vn = left.asJsonNode().asValueListNode(ctx);
if (vn.isUndefinedNode()) {
return false;
} else {
leftValueListNode = vn.asValueListNode();
}
} else {
leftValueListNode = left.asValueListNode();
}
for (ValueNode leftValueNode : leftValueListNode) {
for (ValueNode rightValueNode : rightValueListNode) {
if (leftValueNode.equals(rightValueNode)) {
return true;
}
}
}
return false;
}
}
private static class NoneOfEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
ValueNode.ValueListNode rightValueListNode;
if (right.isJsonNode()) {
ValueNode vn = right.asJsonNode().asValueListNode(ctx);
if (vn.isUndefinedNode()) {
return false;
} else {
rightValueListNode = vn.asValueListNode();
}
} else {
rightValueListNode = right.asValueListNode();
}
ValueNode.ValueListNode leftValueListNode;
if (left.isJsonNode()) {
ValueNode vn = left.asJsonNode().asValueListNode(ctx);
if (vn.isUndefinedNode()) {
return false;
} else {
leftValueListNode = vn.asValueListNode();
}
} else {
leftValueListNode = left.asValueListNode();
}
for (ValueNode leftValueNode : leftValueListNode) {
for (ValueNode rightValueNode : rightValueListNode) {
if (leftValueNode.equals(rightValueNode)) {
return false;
}
}
}
return true;
}
}
}

4
json-path/src/main/java/com/jayway/jsonpath/internal/filter/RelationalOperator.java
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@ -30,7 +30,9 @@ public enum RelationalOperator {
TYPE("TYPE"),
MATCHES("MATCHES"),
EMPTY("EMPTY"),
SUBSETOF("SUBSETOF");
SUBSETOF("SUBSETOF"),
ANYOF("ANYOF"),
NONEOF("NONEOF");
private final String operatorString;

20
json-path/src/test/java/com/jayway/jsonpath/FilterParseTest.java
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@ -1,9 +1,9 @@
package com.jayway.jsonpath;
import java.util.Collections;
import org.assertj.core.api.Assertions;
import org.junit.Test;
import java.util.Collections;
import java.util.regex.Pattern;
import static com.jayway.jsonpath.Criteria.where;
@ -152,6 +152,24 @@ public class FilterParseTest {
assertThat(filter).isEqualTo(parsed);
}
@Test
public void a_anyof_filter_can_be_serialized() {
String filter = filter(where("a").anyof(Collections.emptyList())).toString();
String parsed = parse("[?(@['a'] ANYOF [])]").toString();
assertThat(filter).isEqualTo(parsed);
}
@Test
public void a_noneof_filter_can_be_serialized() {
String filter = filter(where("a").noneof(Collections.emptyList())).toString();
String parsed = parse("[?(@['a'] NONEOF [])]").toString();
assertThat(filter).isEqualTo(parsed);
}
@Test
public void a_exists_filter_can_be_serialized() {

31
json-path/src/test/java/com/jayway/jsonpath/FilterTest.java
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@ -1,6 +1,5 @@
package com.jayway.jsonpath;
import java.util.ArrayList;
import org.assertj.core.util.Lists;
import org.junit.Test;
@ -379,6 +378,36 @@ public class FilterTest extends BaseTest {
assertThat(filter(where("string-arr").subsetof(list)).apply(createPredicateContext(json))).isEqualTo(false);
}
//----------------------------------------------------------------------------
//
// ANYOF
//
//----------------------------------------------------------------------------
@Test
public void array_anyof_evals() {
List<String> list = Lists.newArrayList("a", "z");
assertThat(filter(where("string-arr").anyof(list)).apply(createPredicateContext(json))).isEqualTo(true);
list = Lists.newArrayList("z", "b", "a");
assertThat(filter(where("string-arr").anyof(list)).apply(createPredicateContext(json))).isEqualTo(true);
list = Lists.newArrayList("x", "y", "z");
assertThat(filter(where("string-arr").anyof(list)).apply(createPredicateContext(json))).isEqualTo(false);
}
//----------------------------------------------------------------------------
//
// NONEOF
//
//----------------------------------------------------------------------------
@Test
public void array_noneof_evals() {
List<String> list = Lists.newArrayList("a", "z");
assertThat(filter(where("string-arr").noneof(list)).apply(createPredicateContext(json))).isEqualTo(false);
list = Lists.newArrayList("z", "b", "a");
assertThat(filter(where("string-arr").noneof(list)).apply(createPredicateContext(json))).isEqualTo(false);
list = Lists.newArrayList("x", "y", "z");
assertThat(filter(where("string-arr").noneof(list)).apply(createPredicateContext(json))).isEqualTo(true);
}
//----------------------------------------------------------------------------
//
// EXISTS

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