1 package org.kuali.common.util.create.impl;
2
3 import static com.google.common.base.Preconditions.checkNotNull;
4
5 import java.util.List;
6 import java.util.Set;
7
8 import javax.validation.ConstraintViolation;
9 import javax.validation.Validator;
10
11 import org.kuali.common.util.bind.api.Binder;
12 import org.kuali.common.util.build.InstanceBuilder;
13 import org.kuali.common.util.create.Creator;
14 import org.kuali.common.util.validate.Validation;
15
16 public class DefaultCreator implements Creator {
17
18 private final Validator validator;
19 private final Binder binder;
20
21 @Override
22 public <T> T create(InstanceBuilder<T> builder) {
23 List<String> errors = binder.bind(builder);
24 check(errors);
25 T instance = builder.getInstance();
26 Set<ConstraintViolation<T>> violations = validator.validate(instance);
27 Validation.check(violations);
28 return instance;
29 }
30
31 private static void check(List<String> errors) {
32 if (errors.isEmpty()) {
33 return;
34 }
35 StringBuilder sb = new StringBuilder();
36 sb.append("Binding failed:\n\n");
37 for (int i = 0; i < errors.size(); i++) {
38 if (i != 0) {
39 sb.append("\n");
40 }
41 sb.append(errors.get(i));
42 }
43 sb.append("\n");
44 throw new IllegalArgumentException(sb.toString());
45 }
46
47 private DefaultCreator(Builder builder) {
48 this.validator = builder.validator;
49 this.binder = builder.binder;
50 }
51
52 public static DefaultCreator create(Validator validator, Binder binder) {
53 return builder().validator(validator).binder(binder).build();
54 }
55
56 public static Builder builder() {
57 return new Builder();
58 }
59
60 public static class Builder {
61
62 private Validator validator;
63 private Binder binder;
64
65 public Builder validator(Validator validator) {
66 this.validator = validator;
67 return this;
68 }
69
70 public Builder binder(Binder binder) {
71 this.binder = binder;
72 return this;
73 }
74
75 public DefaultCreator build() {
76 DefaultCreator instance = new DefaultCreator(this);
77 validate(instance);
78 return instance;
79 }
80
81 private static void validate(DefaultCreator instance) {
82 checkNotNull(instance.validator, "'validator' cannot be null");
83 checkNotNull(instance.binder, "'binder' cannot be null");
84 }
85 }
86
87 }