001/*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019
020package org.crsh.cli.impl;
021
022import org.crsh.cli.impl.descriptor.IllegalValueTypeException;
023import org.crsh.cli.type.ValueType;
024import org.crsh.cli.type.ValueTypeFactory;
025
026import java.lang.reflect.ParameterizedType;
027import java.lang.reflect.Type;
028import java.util.List;
029
030public final class ParameterType<V> {
031
032  public static ParameterType create(ValueTypeFactory factory, Type type) throws IllegalValueTypeException {
033    Class<?> declaredType;
034    Multiplicity multiplicity;
035    if (type instanceof Class<?>) {
036      declaredType = (Class<Object>)type;
037      multiplicity = Multiplicity.SINGLE;
038    } else if (type instanceof ParameterizedType) {
039      ParameterizedType parameterizedType = (ParameterizedType)type;
040      Type rawType = parameterizedType.getRawType();
041      if (rawType instanceof Class<?>) {
042        Class<?> classRawType = (Class<Object>)rawType;
043        if (List.class.equals(classRawType)) {
044          Type elementType = parameterizedType.getActualTypeArguments()[0];
045          if (elementType instanceof Class<?>) {
046            declaredType = (Class<Object>)elementType;
047            multiplicity = Multiplicity.MULTI;
048          } else {
049            throw new IllegalValueTypeException();
050          }
051        } else {
052          throw new IllegalValueTypeException();
053        }
054      } else {
055        throw new IllegalValueTypeException();
056      }
057    } else {
058      throw new IllegalValueTypeException();
059    }
060
061    //
062    Class<?> effectiveType;
063    ValueType valueType;
064    if (declaredType == String.class) {
065      effectiveType = String.class;
066      valueType = ValueType.STRING;
067    } else if (declaredType == Integer.class || declaredType == int.class) {
068      effectiveType = Integer.class;
069      valueType = ValueType.INTEGER;
070    } else if (declaredType == Boolean.class || declaredType == boolean.class) {
071      effectiveType = Boolean.class;
072      valueType = ValueType.BOOLEAN;
073    } else if (Enum.class.isAssignableFrom(declaredType)) {
074      effectiveType = declaredType;
075      valueType = ValueType.ENUM;
076    } else {
077      effectiveType = declaredType;
078      valueType = factory.get(declaredType);
079      if (valueType == null) {
080        throw new IllegalValueTypeException("Type " + declaredType.getName() + " is not handled at the moment");
081      }
082    }
083
084    //
085    return new ParameterType(multiplicity, declaredType, effectiveType, valueType);
086  }
087
088  /** . */
089  private final Multiplicity multiplicity;
090
091  /** . */
092  private final Class<?> declaredType;
093
094  /** . */
095  private final Class<V> effectiveType;
096
097  /** . */
098  private final ValueType<V> valueType;
099
100  ParameterType(Multiplicity multiplicity, Class<?> declaredType, Class<V> effectiveType, ValueType<V> valueType) {
101    this.multiplicity = multiplicity;
102    this.declaredType = declaredType;
103    this.effectiveType = effectiveType;
104    this.valueType = valueType;
105  }
106
107  public Object parse(String s) throws Exception {
108    return valueType.parse(effectiveType, s);
109  }
110
111  public Multiplicity getMultiplicity() {
112    return multiplicity;
113  }
114
115  public Class<?> getDeclaredType() {
116    return declaredType;
117  }
118
119  public Class<V> getEffectiveType() {
120    return effectiveType;
121  }
122
123  public ValueType<V> getValueType() {
124    return valueType;
125  }
126}