diff options
Diffstat (limited to 'dcaedt_validator/kwalify/src/main/java/kwalify/Validator.java')
| -rw-r--r-- | dcaedt_validator/kwalify/src/main/java/kwalify/Validator.java | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/dcaedt_validator/kwalify/src/main/java/kwalify/Validator.java b/dcaedt_validator/kwalify/src/main/java/kwalify/Validator.java new file mode 100644 index 0000000..e0f5af0 --- /dev/null +++ b/dcaedt_validator/kwalify/src/main/java/kwalify/Validator.java @@ -0,0 +1,382 @@ +/* + * @(#)Validator.java $Rev: 3 $ $Release: 0.5.1 $ + * + * copyright(c) 2005 kuwata-lab all rights reserved. + */ + +package kwalify; + +import java.util.Map; +import java.util.HashMap; +import java.util.IdentityHashMap; +import java.util.List; +import java.util.LinkedList; +import java.util.ArrayList; +import java.util.Iterator; +import java.util.Collections; + +/** + * validation engine + * + * ex. + * <pre> + * + * // load YAML document + * String str = Util.readFile("document.yaml"); + * YamlParser parser = new YamlParser(str); + * Object document = parser.parse(); + * + * // load schema + * Object schema = YamlUtil.loadFile("schema.yaml"); + * + * // generate validator and validate document + * Validator validator = new Validator(shema); + * List errors = validator.validate(document); + * + * // show errors + * if (errors != null && errors.size() > 0) { + * parser.setErrorsLineNumber(errors); + * java.util.Collections.sort(errors); + * for (Iterator it = errors.iterator(); it.hasNext(); ) { + * ValidationError error = (ValidationError)it.next(); + * int linenum = error.getLineNumber(); + * String path = error.getPath(); + * String mesg = error.getMessage(); + * String s = "- (" + linenum + ") [" + path + "] " + mesg; + * System.err.println(s); + * } + * } + * </pre> + * + * @version $Rev: 3 $ + * @release $Release: 0.5.1 $ + */ +public class Validator { + private Rule _rule; + + public Validator(Map schema) throws SchemaException { + _rule = new Rule(schema); + } + + public Validator(Object schema) throws SchemaException { + _rule = new Rule(schema); + } + + public Rule getRule() { return _rule; } + //public void setRule(Rule rule) { _rule = rule; } + + public List validate(Object value) { + ValidationContext vctx = new ValidationContext(); + _validateRule(value, _rule, vctx); + return vctx.getErrors(); + } + + protected boolean preValidationHook(Object value, Rule rule, ValidationContext context) { + // nothing + return false; + } + + protected void postValidationHook(Object value, Rule rule, ValidationContext context) { + } + + private void _validateRule(Object value, Rule rule, ValidationContext context) { + //why is done necessary? why would one end up having to validate twice the same collection?? + if (Types.isCollection(value)) { + if (context.done(value)) + return; + } + if (rule.isRequired() && value == null) { + Object[] args = new Object[] { Types.typeName(rule.getType()) }; + context.addError("required.novalue", rule, value, args); + return; + } + + if (preValidationHook(value, rule, context)) { + /* a 'higher power says is ok */ + postValidationHook(value, rule, context); + return; + } + + //Class klass = rule.getTypeClass(); + //if (klass != null && value != null && !klass.isInstance(value)) { + + int n = context.errorCount(); + validateRule(value, rule, context); + if (context.errorCount() != n) { + return; + } + // + postValidationHook(value, rule, context); + } + + /* this is the default validation process */ + protected void validateRule(Object value, Rule rule, ValidationContext context) { + + if (value != null && ! Types.isCorrectType(value, rule.getType())) { + Object[] args = new Object[] { Types.typeName(rule.getType()) }; + context.addError("type.unmatch", rule, value, args); + return; + } + // + if (rule.getSequence() != null) { + assert value == null || value instanceof List; + validateSequence((List)value, rule, context); + } else if (rule.getMapping() != null) { + assert value == null || value instanceof Map; + validateMapping((Map)value, rule, context); + } else { + validateScalar(value, rule, context); + } + } + + private void validateScalar(Object value, Rule rule, ValidationContext context) { + assert rule.getSequence() == null; + assert rule.getMapping() == null; + if (rule.getAssert() != null) { + //boolean result = evaluate(rule.getAssert()); + //if (! result) { + // errors.add("asset.failed", rule, path, value, new Object[] { rule.getAssert() }); + //} + } + if (rule.getEnum() != null) { + if (! rule.getEnum().contains(value)) { + //if (Util.matches(keyname, "\\A\\d+\\z") keyname = "enum"; + context.addError("enum.notexist", rule, value, new Object[] { context.getPathElement() }); + } + } + // + if (value == null) { + return; + } + // + if (rule.getPattern() != null) { + if (! Util.matches(value.toString(), rule.getPatternRegexp())) { + context.addError("pattern.unmatch", rule, value, new Object[] { rule.getPattern() }); + } + } + if (rule.getRange() != null) { + assert Types.isScalar(value); + Map range = rule.getRange(); + Object v; + if ((v = range.get("max")) != null && Util.compareValues(v, value) < 0) { + context.addError("range.toolarge", rule, value, new Object[] { v.toString() }); + } + if ((v = range.get("min")) != null && Util.compareValues(v, value) > 0) { + context.addError("range.toosmall", rule, value, new Object[] { v.toString() }); + } + if ((v = range.get("max-ex")) != null && Util.compareValues(v, value) <= 0) { + context.addError("range.toolargeex", rule, value, new Object[] { v.toString() }); + } + if ((v = range.get("min-ex")) != null && Util.compareValues(v, value) >= 0) { + context.addError("range.toosmallex", rule, value, new Object[] { v.toString() }); + } + } + if (rule.getLength() != null) { + assert value instanceof String; + Map length = rule.getLength(); + int len = value.toString().length(); + Integer v; + if ((v = (Integer)length.get("max")) != null && v.intValue() < len) { + context.addError("length.toolong", rule, value, new Object[] { new Integer(len), v }); + } + if ((v = (Integer)length.get("min")) != null && v.intValue() > len) { + context.addError("length.tooshort", rule, value, new Object[] { new Integer(len), v }); + } + if ((v = (Integer)length.get("max-ex")) != null && v.intValue() <= len) { + context.addError("length.toolongex", rule, value, new Object[] { new Integer(len), v }); + } + if ((v = (Integer)length.get("min-ex")) != null && v.intValue() >= len) { + context.addError("length.tooshortex", rule, value, new Object[] { new Integer(len), v }); + } + } + } + + + private void validateSequence(List sequence, Rule seq_rule, ValidationContext context) { + assert seq_rule.getSequence() instanceof List; + assert seq_rule.getSequence().size() == 1; + if (sequence == null) { + return; + } + Rule rule = (Rule)seq_rule.getSequence().get(0); + int i = 0; + for (Iterator it = sequence.iterator(); it.hasNext(); i++) { + Object val = it.next(); + context.addPathElement(String.valueOf(i)); + _validateRule(val, rule, context); // validate recursively + context.removePathElement(); + } + if (rule.getType().equals("map")) { + Map mapping = rule.getMapping(); + List unique_keys = new ArrayList(); + for (Iterator it = mapping.keySet().iterator(); it.hasNext(); ) { + Object key = it.next(); + Rule map_rule = (Rule)mapping.get(key); + if (map_rule.isUnique() || map_rule.isIdent()) { + unique_keys.add(key); + } + } + // + if (unique_keys.size() > 0) { + for (Iterator it = unique_keys.iterator(); it.hasNext(); ) { + Object key = it.next(); + Map table = new HashMap(); // val => index + int j = 0; + for (Iterator it2 = sequence.iterator(); it2.hasNext(); j++) { + Map map = (Map)it2.next(); + Object val = map.get(key); + if (val == null) { + continue; + } + if (table.containsKey(val)) { + String path = context.getPath(); + String prev_path = path + "/" + table.get(val) + "/" + key; + context.addPathElement(String.valueOf(j)) + .addPathElement(key.toString()); + context.addError("value.notunique", rule, val, new Object[] { prev_path }); + context.removePathElement() + .removePathElement(); + } else { + table.put(val, new Integer(j)); + } + } + } + } + } else if (rule.isUnique()) { + Map table = new HashMap(); // val => index + int j = 0; + for (Iterator it = sequence.iterator(); it.hasNext(); j++) { + Object val = it.next(); + if (val == null) { + continue; + } + if (table.containsKey(val)) { + String path = context.getPath(); + String prev_path = path + "/" + table.get(val); + context.addPathElement(String.valueOf(j)) + .addError("value.notunique", rule, val, new Object[] { prev_path }) + .removePathElement(); + } else { + table.put(val, new Integer(j)); + } + } + } + } + + + private void validateMapping(Map mapping, Rule map_rule, ValidationContext context) { + assert map_rule.getMapping() instanceof Map; + if (mapping == null) { + return; + } + Map m = map_rule.getMapping(); + for (Iterator it = m.keySet().iterator(); it.hasNext(); ) { + Object key = it.next(); + Rule rule = (Rule)m.get(key); + if (rule.isRequired() && !mapping.containsKey(key)) { + context.addError("required.nokey", rule, mapping, new Object[] { key }); + } + } + for (Iterator it = mapping.keySet().iterator(); it.hasNext(); ) { + Object key = it.next(); + Object val = mapping.get(key); + Rule rule = (Rule)m.get(key); + context.addPathElement(key.toString()); + if (rule == null) { + context.addError("key.undefined", rule, mapping, new Object[] { key.toString() + ":", map_rule.getName() + m.keySet().toString() }); + } else { + _validateRule(val, rule, context); // validate recursively + } + context.removePathElement(); + } + } + + + public class ValidationContext { + + private StringBuilder path = new StringBuilder(""); + private List errors = new LinkedList(); + private Map done = new IdentityHashMap(); //completion tracker + + private ValidationContext() { + } + + public String getPath() { + return this.path.toString(); + } + + public Validator getValidator() { + return Validator.this; + } + + public ValidationContext addPathElement(String theElement) { + this.path.append("/") + .append(theElement); + return this; + } + + public String getPathElement() { + int index = this.path.lastIndexOf("/"); + return index >= 0 ? this.path.substring(index + 1) : this.path.toString(); + } + + public ValidationContext removePathElement() { + int index = this.path.lastIndexOf("/"); + if (index >= 0) + this.path.delete(index, this.path.length()); + return this; + } + + protected ValidationContext addError(String error_symbol, Rule rule, Object value, Object[] args) { + addError( + new ValidationException( + Messages.buildMessage(error_symbol, value, args), getPath(), value, rule)); + return this; + } + + protected ValidationContext addError(String error_symbol, Rule rule, String relpath, Object value, Object[] args) { + addError( + new ValidationException( + Messages.buildMessage(error_symbol, value, args), getPath()+"/"+relpath, value, rule)); + return this; + } + + public ValidationContext addError(String message, Rule rule, Object value, Throwable cause) { + addError( + new ValidationException( + message + ((cause == null) ? "" : ", cause " + cause), getPath(), value, rule)); + return this; + } + + public ValidationContext addError(ValidationException theError) { + this.errors.add(theError); + return this; + } + + + public List getErrors() { + return Collections.unmodifiableList(this.errors); + } + + public boolean hasErrors() { + return this.errors.isEmpty(); + } + + public int errorCount() { + return this.errors.size(); + } + + private boolean done(Object theTarget) { + if (this.done.get(theTarget) != null) { + return true; + } + this.done.put(theTarget, Boolean.TRUE); + return false; + } + + private boolean isDone(Object theTarget) { + return this.done.get(theTarget) != null; + } + } + +} |