Subversion Repositories bacoAlunos

package genson.reflect;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

/**
 * This interface is intended to be implemented by classes who want to change the way genson does
 * name resolution. The resolved name will be used in the generated stream during serialization and
 * injected into constructors/or setters during deserialization. If you can not resolve the name
 * just return null. You can have a look at the <a href=
 * "http://code.google.com/p/genson/source/browse/src/main/java/com/owlike/genson/reflect/PropertyNameResolver.java"
 * >source code</a> for an example.
 *
 * @author eugen
 * @see genson.annotation.JsonProperty JsonProperty
 */
public interface PropertyNameResolver {
  /**
   * Resolve the parameter name on position parameterIdx in the constructor fromConstructor.
   *
   * @param parameterIdx
   * @param fromConstructor
   * @return the resolved name of the parameter or null
   */
  public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, Constructor<?> fromConstructor);

  /**
   * Resolve the name of the parameter with parameterIdx as index in fromMethod method.
   *
   * @param parameterIdx
   * @param fromMethod
   * @return the resolved name of the parameter or null
   */
  public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, 1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod);

  /**
   * Resolve the property name from this field.
   *
   * @param fromField - the field to use for name resolution.
   * @return the resolved name or null.
   */
  public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Field.html">Field fromField);

  /**
   * Resolve the property name from this method.
   *
   * @param fromMethod - the method to be used for name resolution.
   * @return the resolved name or null.
   */
  public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod);

  public static class CompositePropertyNameResolver implements PropertyNameResolver {
    private List<PropertyNameResolver> components;

    public CompositePropertyNameResolver(List<PropertyNameResolver> components) {
      if (components == null || components.isEmpty()) {
        throw new 1.5.0/docs/api/java/lang/IllegalArgumentException.html">IllegalArgumentException(
          "The composite resolver must have at least one resolver as component!");
      }
      this.components = new LinkedList<PropertyNameResolver>(components);
    }

    public CompositePropertyNameResolver add(PropertyNameResolver... resolvers) {
      // should at the head position so custom resolvers a privileged
      components.addAll(0, 1.5.0/docs/api/java/util/Arrays.html">Arrays.asList(resolvers));
      return this;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, Constructor<?> fromConstructor) {
      1.5.0/docs/api/java/lang/String.html">String resolvedName = null;
      for (Iterator<PropertyNameResolver> it = components.iterator(); resolvedName == null
        && it.hasNext(); ) {
        resolvedName = it.next().resolve(parameterIdx, fromConstructor);
      }
      return resolvedName;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, 1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod) {
      1.5.0/docs/api/java/lang/String.html">String resolvedName = null;
      for (Iterator<PropertyNameResolver> it = components.iterator(); resolvedName == null
        && it.hasNext(); ) {
        resolvedName = it.next().resolve(parameterIdx, fromMethod);
      }
      return resolvedName;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Field.html">Field fromField) {
      1.5.0/docs/api/java/lang/String.html">String resolvedName = null;
      for (Iterator<PropertyNameResolver> it = components.iterator(); resolvedName == null
        && it.hasNext(); ) {
        resolvedName = it.next().resolve(fromField);
      }
      return resolvedName;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod) {
      1.5.0/docs/api/java/lang/String.html">String resolvedName = null;
      for (Iterator<PropertyNameResolver> it = components.iterator(); resolvedName == null
        && it.hasNext(); ) {
        resolvedName = it.next().resolve(fromMethod);
      }
      return resolvedName;
    }

  }

  public static class ConventionalBeanPropertyNameResolver implements PropertyNameResolver {

    public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, Constructor<?> fromConstructor) {
      return null;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Field.html">Field fromField) {
      return fromField.getName();
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod) {
      1.5.0/docs/api/java/lang/String.html">String name = fromMethod.getName();
      int length = -1;

      if (name.startsWith("get"))
        length = 3;
      else if (name.startsWith("is"))
        length = 2;
      else if (name.startsWith("set"))
        length = 3;

      if (length > -1 && length < name.length()) {
        return 1.5.0/docs/api/java/lang/Character.html">Character.toLowerCase(name.charAt(length)) + name.substring(length + 1);
      } else
        return null;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, 1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod) {
      return null;
    }

  }

  /**
   * JsonProperty resolver based on @JsonProperty annotation. Can be used on fields, methods and
   * constructor parameters.
   */
  public static class AnnotationPropertyNameResolver implements PropertyNameResolver {
    public AnnotationPropertyNameResolver() {
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, Constructor<?> fromConstructor) {
      5+0%2Fdocs%2Fapi+Annotation">Annotation[] paramAnns = fromConstructor.getParameterAnnotations()[parameterIdx];
      1.5.0/docs/api/java/lang/String.html">String name = null;
      for (int j = 0; j < paramAnns.length; j++) {
        if (paramAnns[j] instanceof genson.annotation.JsonProperty) {
          name = ((genson.annotation.JsonProperty) paramAnns[j]).value();
          break;
        }
      }
      return "".equals(name) ? null : name;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(int parameterIdx, 1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod) {
      5+0%2Fdocs%2Fapi+Annotation">Annotation[] anns = fromMethod.getParameterAnnotations()[parameterIdx];
      1.5.0/docs/api/java/lang/String.html">String name = null;
      for (5+0%2Fdocs%2Fapi+Annotation">Annotation ann : anns) {
        if (ann instanceof genson.annotation.JsonProperty) {
          name = ((genson.annotation.JsonProperty) ann).value();
          break;
        }
      }
      return "".equals(name) ? null : name;
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Field.html">Field fromField) {
      return getName(fromField);
    }

    public 1.5.0/docs/api/java/lang/String.html">String resolve(1.5.0/docs/api/java/lang/reflect/Method.html">Method fromMethod) {
      return getName(fromMethod);
    }

    protected 1.5.0/docs/api/java/lang/String.html">String getName(1.5.0/docs/api/java/lang/reflect/AnnotatedElement.html">AnnotatedElement annElement) {
      genson.annotation.JsonProperty name = annElement.getAnnotation(genson.annotation.JsonProperty.class);
      return name != null && name.value() != null && !name.value().isEmpty() ? name.value()
        : null;
    }
  }
}