2 * Copyright 2008 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package org.wamblee.system.adapters;
18 import java.util.ArrayList;
19 import java.util.List;
21 import org.wamblee.system.core.DefaultRequiredInterface;
22 import org.wamblee.system.core.RequiredInterface;
23 import org.wamblee.system.core.Scope;
26 * Represents parameter values for a method or constructor and allows for the configuration
27 * of how these values are retrieved.
29 * @author Erik Brakkee
31 public class ParameterValues {
32 private Class[] _types;
33 private ValueProvider[] _values;
36 * Constructs the configuration. By default no constructor is selected and
37 * one of {@link #select(Class...)} or
38 * {@link #greedy()} must be called.
39 * @param aClass Class to construct.
41 public ParameterValues(Class[] aTypes) {
46 public Class[] getTypes() {
51 * Sets argument i to be optional, meaning that null is allowed to be passed in.
52 * @param aArg Argument to set.
54 public ParameterValues setOptional(int aArg) {
55 _values[aArg] = new RequiredInterfaceProvider(new DefaultRequiredInterface(
56 "arg" + aArg, _types[aArg], true));
61 * Sets the argument i to a fixed value.
62 * @param aArg Argument to set.
63 * @param aValue Value.
65 public ParameterValues setValue(int aArg, Object aValue) {
66 _values[aArg] = new FixedValueProvider(aValue);
73 private void resetValues() {
74 _values = new ValueProvider[_types.length];
75 for (int i = 0; i < _values.length; i++) {
76 _values[i] = new RequiredInterfaceProvider(new DefaultRequiredInterface(
77 "arg" + i, _types[i]));
81 public List<RequiredInterface> getRequiredInterfaces() {
82 List<RequiredInterface> result = new ArrayList<RequiredInterface>();
83 for (ValueProvider provider: _values) {
84 if ( provider instanceof RequiredInterfaceProvider) {
85 result.add( ((RequiredInterfaceProvider)provider).getRequiredInterface());
91 public Object[] values(Scope aScope) {
92 Object[] values = new Object[_values.length];
93 for (int i = 0; i < _values.length; i++) {
94 values[i] = _values[i].getValue(aScope);