package com.jayway.jsonpath.internal.filter;
import com.jayway.jsonpath.JsonPathException;
import com.jayway.jsonpath.Predicate;
import java.util.HashMap;
import java.util.Map;
import static com.jayway.jsonpath.internal.filter.ValueNodes.PatternNode;
import static com.jayway.jsonpath.internal.filter.ValueNodes.ValueListNode;
public class EvaluatorFactory {
private static final Map<RelationalOperator, Evaluator> evaluators = new HashMap<RelationalOperator, Evaluator>();
static {
evaluators.put(RelationalOperator.EXISTS, new ExistsEvaluator());
evaluators.put(RelationalOperator.NE, new NotEqualsEvaluator());
evaluators.put(RelationalOperator.TSNE, new TypeSafeNotEqualsEvaluator());
evaluators.put(RelationalOperator.EQ, new EqualsEvaluator());
evaluators.put(RelationalOperator.TSEQ, new TypeSafeEqualsEvaluator());
evaluators.put(RelationalOperator.LT, new LessThanEvaluator());
evaluators.put(RelationalOperator.LTE, new LessThanEqualsEvaluator());
evaluators.put(RelationalOperator.GT, new GreaterThanEvaluator());
evaluators.put(RelationalOperator.GTE, new GreaterThanEqualsEvaluator());
evaluators.put(RelationalOperator.REGEX, new RegexpEvaluator());
evaluators.put(RelationalOperator.SIZE, new SizeEvaluator());
evaluators.put(RelationalOperator.EMPTY, new EmptyEvaluator());
evaluators.put(RelationalOperator.IN, new InEvaluator());
evaluators.put(RelationalOperator.NIN, new NotInEvaluator());
evaluators.put(RelationalOperator.ALL, new AllEvaluator());
evaluators.put(RelationalOperator.CONTAINS, new ContainsEvaluator());
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){
return evaluators.get(operator);
}
private static class ExistsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(!left.isBooleanNode() && !right.isBooleanNode()){
throw new JsonPathException("Failed to evaluate exists expression");
}
return left.asBooleanNode().getBoolean() == right.asBooleanNode().getBoolean();
}
}
private static class NotEqualsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
return !evaluators.get(RelationalOperator.EQ).evaluate(left, right, ctx);
}
}
private static class TypeSafeNotEqualsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
return !evaluators.get(RelationalOperator.TSEQ).evaluate(left, right, ctx);
}
}
private static class EqualsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(left.isJsonNode() && right.isJsonNode()){
return left.asJsonNode().equals(right.asJsonNode(), ctx);
} else {
return left.equals(right);
}
}
}
private static class TypeSafeEqualsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(!left.getClass().equals(right.getClass())){
return false;
}
return evaluators.get(RelationalOperator.EQ).evaluate(left, right, ctx);
}
}
private static class TypeEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
return right.asClassNode().getClazz() == left.type(ctx);
}
}
private static class LessThanEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(left.isNumberNode() && right.isNumberNode()){
return left.asNumberNode().getNumber().compareTo(right.asNumberNode().getNumber()) < 0;
} if(left.isStringNode() && right.isStringNode()){
return left.asStringNode().getString().compareTo(right.asStringNode().getString()) < 0;
}
return false;
}
}
private static class LessThanEqualsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(left.isNumberNode() && right.isNumberNode()){
return left.asNumberNode().getNumber().compareTo(right.asNumberNode().getNumber()) <= 0;
} if(left.isStringNode() && right.isStringNode()){
return left.asStringNode().getString().compareTo(right.asStringNode().getString()) <= 0;
}
return false;
}
}
private static class GreaterThanEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(left.isNumberNode() && right.isNumberNode()){
return left.asNumberNode().getNumber().compareTo(right.asNumberNode().getNumber()) > 0;
} else if(left.isStringNode() && right.isStringNode()){
return left.asStringNode().getString().compareTo(right.asStringNode().getString()) > 0;
}
return false;
}
}
private static class GreaterThanEqualsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(left.isNumberNode() && right.isNumberNode()){
return left.asNumberNode().getNumber().compareTo(right.asNumberNode().getNumber()) >= 0;
} else if(left.isStringNode() && right.isStringNode()){
return left.asStringNode().getString().compareTo(right.asStringNode().getString()) >= 0;
}
return false;
}
}
private static class SizeEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if (! right.isNumberNode()) {
return false;
}
int expectedSize = right.asNumberNode().getNumber().intValue();
if(left.isStringNode()){
return left.asStringNode().length() == expectedSize;
} else if(left.isJsonNode()){
return left.asJsonNode().length(ctx) == expectedSize;
}
return false;
}
}
private static class EmptyEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(left.isStringNode()){
return left.asStringNode().isEmpty() == right.asBooleanNode().getBoolean();
} else if(left.isJsonNode()){
return left.asJsonNode().isEmpty(ctx) == right.asBooleanNode().getBoolean();
}
return false;
}
}
private static class InEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
ValueListNode valueListNode;
if(right.isJsonNode()){
ValueNode vn = right.asJsonNode().asValueListNode(ctx);
if(vn.isUndefinedNode()){
return false;
} else {
valueListNode = vn.asValueListNode();
}
} else {
valueListNode = right.asValueListNode();
}
return valueListNode.contains(left);
}
}
private static class NotInEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
return !evaluators.get(RelationalOperator.IN).evaluate(left, right, ctx);
}
}
private static class AllEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
ValueListNode requiredValues = right.asValueListNode();
if(left.isJsonNode()){
ValueNode valueNode = left.asJsonNode().asValueListNode(ctx);
if(valueNode.isValueListNode()){
ValueListNode shouldContainAll = valueNode.asValueListNode();
for (ValueNode required : requiredValues) {
if(!shouldContainAll.contains(required)){
return false;
}
}
}
return true;
}
return false;
}
}
private static class ContainsEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(left.isStringNode() && right.isStringNode()){
return left.asStringNode().contains(right.asStringNode().getString());
} else if(left.isJsonNode()){
ValueNode valueNode = left.asJsonNode().asValueListNode(ctx);
if(valueNode.isUndefinedNode()) return false;
else {
boolean res = valueNode.asValueListNode().contains(right);
return res;
}
}
return false;
}
}
private static class PredicateMatchEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
return right.asPredicateNode().getPredicate().apply(ctx);
}
}
private static class RegexpEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
if(!(left.isPatternNode() ^ right.isPatternNode())){
return false;
}
if (left.isPatternNode()) {
return matches(left.asPatternNode(), getInput(right));
} else {
return matches(right.asPatternNode(), getInput(left));
}
}
private boolean matches(PatternNode patternNode, String inputToMatch) {
return patternNode.getCompiledPattern().matcher(inputToMatch).matches();
}
private String getInput(ValueNode valueNode) {
String input = "";
if (valueNode.isStringNode() || valueNode.isNumberNode()) {
input = valueNode.asStringNode().getString();
} else if (valueNode.isBooleanNode()) {
input = valueNode.asBooleanNode().toString();
}
return input;
}
}
private static class SubsetOfEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
ValueListNode rightValueListNode;
if(right.isJsonNode()){
ValueNode vn = right.asJsonNode().asValueListNode(ctx);
if(vn.isUndefinedNode()){
return false;
} else {
rightValueListNode = vn.asValueListNode();
}
} else {
rightValueListNode = right.asValueListNode();
}
ValueListNode leftValueListNode;
if(left.isJsonNode()){
ValueNode vn = left.asJsonNode().asValueListNode(ctx);
if(vn.isUndefinedNode()){
return false;
} else {
leftValueListNode = vn.asValueListNode();
}
} else {
leftValueListNode = left.asValueListNode();
}
return leftValueListNode.subsetof(rightValueListNode);
}
}
private static class AnyOfEvaluator implements Evaluator {
@Override
public boolean evaluate(ValueNode left, ValueNode right, Predicate.PredicateContext ctx) {
ValueListNode rightValueListNode;
if (right.isJsonNode()) {
ValueNode vn = right.asJsonNode().asValueListNode(ctx);
if (vn.isUndefinedNode()) {
return false;
} else {
rightValueListNode = vn.asValueListNode();
}
} else {
rightValueListNode = right.asValueListNode();
}
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) {
ValueListNode rightValueListNode;
if (right.isJsonNode()) {
ValueNode vn = right.asJsonNode().asValueListNode(ctx);
if (vn.isUndefinedNode()) {
return false;
} else {
rightValueListNode = vn.asValueListNode();
}
} else {
rightValueListNode = right.asValueListNode();
}
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;
}
}
}
EvaluatorFactory
evaluators: Map<RelationalOperator, Evaluator>
static class initializer
