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Implementation of the JSON Schema Core Draft v4 specification built with the org.json API

There is a newer version: 1.14.4

package org.everit.json.schema;

import static java.lang.String.format;
import static java.util.Objects.requireNonNull;

import java.util.Optional;

import org.everit.json.schema.regexp.Regexp;

public class StringSchemaValidatingVisitor extends Visitor {

    private final Object subject;

    private String stringSubject;

    private int stringLength;

    private final ValidatingVisitor owner;

    public StringSchemaValidatingVisitor(Object subject, ValidatingVisitor owner) {
        this.subject = subject;
        this.owner = requireNonNull(owner, "failureReporter cannot be null");
    }

    @Override void visitStringSchema(StringSchema stringSchema) {
        if (owner.passesTypeCheck(String.class, stringSchema.requireString(), stringSchema.isNullable())) {
            stringSubject = (String) subject;
            stringLength = stringSubject.codePointCount(0, stringSubject.length());
            super.visitStringSchema(stringSchema);
        }
    }

    @Override void visitMinLength(Integer minLength) {
        if (minLength != null && stringLength < minLength.intValue()) {
            owner.failure("expected minLength: " + minLength + ", actual: "
                    + stringLength, "minLength");
        }
    }

    @Override void visitMaxLength(Integer maxLength) {
        if (maxLength != null && stringLength > maxLength.intValue()) {
            owner.failure("expected maxLength: " + maxLength + ", actual: "
                    + stringLength, "maxLength");
        }
    }

    @Override void visitPattern(Regexp pattern) {
        if (pattern != null && pattern.patternMatchingFailure(stringSubject).isPresent()) {
            String message = format("string [%s] does not match pattern %s", subject, pattern.toString());
            owner.failure(message, "pattern");
        }
    }

    @Override void visitFormat(FormatValidator formatValidator) {
        Optional failure = formatValidator.validate(stringSubject);
        if (failure.isPresent()) {
            owner.failure(failure.get(), "format");
        }
    }

}