Examples of org.springframework.beans.BeanWrapper

org.springframework.beans.BeanWrapper
The central interface of Spring's low-level JavaBeans infrastructure.
Typically not used directly but rather implicitly via a {@link org.springframework.beans.factory.BeanFactory} or a{@link org.springframework.validation.DataBinder}.
Provides operations to analyze and manipulate standard JavaBeans: the ability to get and set property values (individually or in bulk), get property descriptors, and query the readability/writability of properties.
This interface supports nested properties enabling the setting of properties on subproperties to an unlimited depth.
A BeanWrapper's default for the "extractOldValueForEditor" setting is "false", to avoid side effects caused by getter method invocations. Turn this to "true" to expose present property values to custom editors. @author Rod Johnson @author Juergen Hoeller @since 13 April 2001 @see PropertyAccessor @see PropertyEditorRegistry @see PropertyAccessorFactory#forBeanPropertyAccess @see org.springframework.beans.factory.BeanFactory @see org.springframework.validation.BeanPropertyBindingResult @see org.springframework.validation.DataBinder#initBeanPropertyAccess()

    assertEquals("b", tb.getArray()[1].getName());
  }


  public void testArrayToStringConversion() throws PropertyVetoException {
    TestBean tb = new TestBean();
    BeanWrapper bw = new BeanWrapperImpl(tb);
    bw.registerCustomEditor(String.class, new PropertyEditorSupport() {
      public void setAsText(String text) throws IllegalArgumentException {
        setValue("-" + text + "-");
      }
    });
    bw.setPropertyValue("name", new String[] {"a", "b"});
    assertEquals("-a,b-", tb.getName());
  }

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    assertEquals(falseString, editor.getAsText());
  }


  public void testDefaultNumberEditor() {
    NumberTestBean tb = new NumberTestBean();
    BeanWrapper bw = new BeanWrapperImpl(tb);


    bw.setPropertyValue("short1", "1");
    bw.setPropertyValue("short2", "2");
    bw.setPropertyValue("int1", "7");
    bw.setPropertyValue("int2", "8");
    bw.setPropertyValue("long1", "5");
    bw.setPropertyValue("long2", "6");
    bw.setPropertyValue("bigInteger", "3");
    bw.setPropertyValue("float1", "7.1");
    bw.setPropertyValue("float2", "8.1");
    bw.setPropertyValue("double1", "5.1");
    bw.setPropertyValue("double2", "6.1");
    bw.setPropertyValue("bigDecimal", "4.5");


    assertTrue("Correct short1 value", new Short("1").equals(bw.getPropertyValue("short1")));
    assertTrue("Correct short1 value", tb.getShort1() == 1);
    assertTrue("Correct short2 value", new Short("2").equals(bw.getPropertyValue("short2")));
    assertTrue("Correct short2 value", new Short("2").equals(tb.getShort2()));
    assertTrue("Correct int1 value", new Integer("7").equals(bw.getPropertyValue("int1")));
    assertTrue("Correct int1 value", tb.getInt1() == 7);
    assertTrue("Correct int2 value", new Integer("8").equals(bw.getPropertyValue("int2")));
    assertTrue("Correct int2 value", new Integer("8").equals(tb.getInt2()));
    assertTrue("Correct long1 value", new Long("5").equals(bw.getPropertyValue("long1")));
    assertTrue("Correct long1 value", tb.getLong1() == 5);
    assertTrue("Correct long2 value", new Long("6").equals(bw.getPropertyValue("long2")));
    assertTrue("Correct long2 value", new Long("6").equals(tb.getLong2()));
    assertTrue("Correct bigInteger value", new BigInteger("3").equals(bw.getPropertyValue("bigInteger")));
    assertTrue("Correct bigInteger value", new BigInteger("3").equals(tb.getBigInteger()));
    assertTrue("Correct float1 value", new Float("7.1").equals(bw.getPropertyValue("float1")));
    assertTrue("Correct float1 value", new Float("7.1").equals(new Float(tb.getFloat1())));
    assertTrue("Correct float2 value", new Float("8.1").equals(bw.getPropertyValue("float2")));
    assertTrue("Correct float2 value", new Float("8.1").equals(tb.getFloat2()));
    assertTrue("Correct double1 value", new Double("5.1").equals(bw.getPropertyValue("double1")));
    assertTrue("Correct double1 value", tb.getDouble1() == 5.1);
    assertTrue("Correct double2 value", new Double("6.1").equals(bw.getPropertyValue("double2")));
    assertTrue("Correct double2 value", new Double("6.1").equals(tb.getDouble2()));
    assertTrue("Correct bigDecimal value", new BigDecimal("4.5").equals(bw.getPropertyValue("bigDecimal")));
    assertTrue("Correct bigDecimal value", new BigDecimal("4.5").equals(tb.getBigDecimal()));
  }

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  }


  public void testCustomNumberEditorWithoutAllowEmpty() {
    NumberFormat nf = NumberFormat.getNumberInstance(Locale.GERMAN);
    NumberTestBean tb = new NumberTestBean();
    BeanWrapper bw = new BeanWrapperImpl(tb);
    bw.registerCustomEditor(short.class, new CustomNumberEditor(Short.class, nf, false));
    bw.registerCustomEditor(Short.class, new CustomNumberEditor(Short.class, nf, false));
    bw.registerCustomEditor(int.class, new CustomNumberEditor(Integer.class, nf, false));
    bw.registerCustomEditor(Integer.class, new CustomNumberEditor(Integer.class, nf, false));
    bw.registerCustomEditor(long.class, new CustomNumberEditor(Long.class, nf, false));
    bw.registerCustomEditor(Long.class, new CustomNumberEditor(Long.class, nf, false));
    bw.registerCustomEditor(BigInteger.class, new CustomNumberEditor(BigInteger.class, nf, false));
    bw.registerCustomEditor(float.class, new CustomNumberEditor(Float.class, nf, false));
    bw.registerCustomEditor(Float.class, new CustomNumberEditor(Float.class, nf, false));
    bw.registerCustomEditor(double.class, new CustomNumberEditor(Double.class, nf, false));
    bw.registerCustomEditor(Double.class, new CustomNumberEditor(Double.class, nf, false));
    bw.registerCustomEditor(BigDecimal.class, new CustomNumberEditor(BigDecimal.class, nf, false));


    bw.setPropertyValue("short1", "1");
    bw.setPropertyValue("short2", "2");
    bw.setPropertyValue("int1", "7");
    bw.setPropertyValue("int2", "8");
    bw.setPropertyValue("long1", "5");
    bw.setPropertyValue("long2", "6");
    bw.setPropertyValue("bigInteger", "3");
    bw.setPropertyValue("float1", "7,1");
    bw.setPropertyValue("float2", "8,1");
    bw.setPropertyValue("double1", "5,1");
    bw.setPropertyValue("double2", "6,1");
    bw.setPropertyValue("bigDecimal", "4,5");


    assertTrue("Correct short1 value", new Short("1").equals(bw.getPropertyValue("short1")));
    assertTrue("Correct short1 value", tb.getShort1() == 1);
    assertTrue("Correct short2 value", new Short("2").equals(bw.getPropertyValue("short2")));
    assertTrue("Correct short2 value", new Short("2").equals(tb.getShort2()));
    assertTrue("Correct int1 value", new Integer("7").equals(bw.getPropertyValue("int1")));
    assertTrue("Correct int1 value", tb.getInt1() == 7);
    assertTrue("Correct int2 value", new Integer("8").equals(bw.getPropertyValue("int2")));
    assertTrue("Correct int2 value", new Integer("8").equals(tb.getInt2()));
    assertTrue("Correct long1 value", new Long("5").equals(bw.getPropertyValue("long1")));
    assertTrue("Correct long1 value", tb.getLong1() == 5);
    assertTrue("Correct long2 value", new Long("6").equals(bw.getPropertyValue("long2")));
    assertTrue("Correct long2 value", new Long("6").equals(tb.getLong2()));
    assertTrue("Correct bigInteger value", new BigInteger("3").equals(bw.getPropertyValue("bigInteger")));
    assertTrue("Correct bigInteger value", new BigInteger("3").equals(tb.getBigInteger()));
    assertTrue("Correct float1 value", new Float("7.1").equals(bw.getPropertyValue("float1")));
    assertTrue("Correct float1 value", new Float("7.1").equals(new Float(tb.getFloat1())));
    assertTrue("Correct float2 value", new Float("8.1").equals(bw.getPropertyValue("float2")));
    assertTrue("Correct float2 value", new Float("8.1").equals(tb.getFloat2()));
    assertTrue("Correct double1 value", new Double("5.1").equals(bw.getPropertyValue("double1")));
    assertTrue("Correct double1 value", tb.getDouble1() == 5.1);
    assertTrue("Correct double2 value", new Double("6.1").equals(bw.getPropertyValue("double2")));
    assertTrue("Correct double2 value", new Double("6.1").equals(tb.getDouble2()));
    assertTrue("Correct bigDecimal value", new BigDecimal("4.5").equals(bw.getPropertyValue("bigDecimal")));
    assertTrue("Correct bigDecimal value", new BigDecimal("4.5").equals(tb.getBigDecimal()));
  }

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  }


  public void testCustomNumberEditorWithAllowEmpty() {
    NumberFormat nf = NumberFormat.getNumberInstance(Locale.GERMAN);
    NumberTestBean tb = new NumberTestBean();
    BeanWrapper bw = new BeanWrapperImpl(tb);
    bw.registerCustomEditor(long.class, new CustomNumberEditor(Long.class, nf, true));
    bw.registerCustomEditor(Long.class, new CustomNumberEditor(Long.class, nf, true));


    bw.setPropertyValue("long1", "5");
    bw.setPropertyValue("long2", "6");
    assertTrue("Correct long1 value", new Long("5").equals(bw.getPropertyValue("long1")));
    assertTrue("Correct long1 value", tb.getLong1() == 5);
    assertTrue("Correct long2 value", new Long("6").equals(bw.getPropertyValue("long2")));
    assertTrue("Correct long2 value", new Long("6").equals(tb.getLong2()));


    bw.setPropertyValue("long2", "");
    assertTrue("Correct long2 value", bw.getPropertyValue("long2") == null);
    assertTrue("Correct long2 value", tb.getLong2() == null);


    try {
      bw.setPropertyValue("long1", "");
      fail("Should have thrown BeansException");
    }
    catch (BeansException ex) {
      // expected
      assertTrue("Correct long1 value", new Long("5").equals(bw.getPropertyValue("long1")));
      assertTrue("Correct long1 value", tb.getLong1() == 5);
    }
  }

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  }


  public void testCustomNumberEditorWithFrenchBigDecimal() throws Exception {
    NumberFormat nf = NumberFormat.getNumberInstance(Locale.FRENCH);
    NumberTestBean tb = new NumberTestBean();
    BeanWrapper bw = new BeanWrapperImpl(tb);
    bw.registerCustomEditor(BigDecimal.class, new CustomNumberEditor(BigDecimal.class, nf, true));
    bw.setPropertyValue("bigDecimal", "1000");
    assertEquals(1000.0f, tb.getBigDecimal().floatValue(), 0f);
    bw.setPropertyValue("bigDecimal", "1000,5");
    assertEquals(1000.5f, tb.getBigDecimal().floatValue(), 0f);
    bw.setPropertyValue("bigDecimal", "1 000,5");
    assertEquals(1000.5f, tb.getBigDecimal().floatValue(), 0f);
  }

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    }.runTest();
  }


  public void testByteArrayPropertyEditor() {
    PrimitiveArrayBean bean = new PrimitiveArrayBean();
    BeanWrapper bw = new BeanWrapperImpl(bean);
    bw.setPropertyValue("byteArray", "myvalue");
    assertEquals("myvalue", new String(bean.getByteArray()));
  }

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    assertEquals("myvalue", new String(bean.getByteArray()));
  }


  public void testCharArrayPropertyEditor() {
    PrimitiveArrayBean bean = new PrimitiveArrayBean();
    BeanWrapper bw = new BeanWrapperImpl(bean);
    bw.setPropertyValue("charArray", "myvalue");
    assertEquals("myvalue", new String(bean.getCharArray()));
  }

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    assertEquals("myvalue", new String(bean.getCharArray()));
  }


  public void testCharacterEditor() {
    CharBean cb = new CharBean();
    BeanWrapper bw = new BeanWrapperImpl(cb);


    bw.setPropertyValue("myChar", new Character('c'));
    assertEquals('c', cb.getMyChar());


    bw.setPropertyValue("myChar", "c");
    assertEquals('c', cb.getMyChar());


    bw.setPropertyValue("myChar", "\u0041");
    assertEquals('A', cb.getMyChar());


    bw.setPropertyValue("myChar", "\\u0022");
    assertEquals('"', cb.getMyChar());
    
    CharacterEditor editor = new CharacterEditor(false);
    editor.setAsText("M");
    assertEquals("M", editor.getAsText());

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    assertEquals("M", editor.getAsText());
  }


  public void testCharacterEditorWithAllowEmpty() {
    CharBean cb = new CharBean();
    BeanWrapper bw = new BeanWrapperImpl(cb);
    bw.registerCustomEditor(Character.class, new CharacterEditor(true));


    bw.setPropertyValue("myCharacter", new Character('c'));
    assertEquals(new Character('c'), cb.getMyCharacter());


    bw.setPropertyValue("myCharacter", "c");
    assertEquals(new Character('c'), cb.getMyCharacter());


    bw.setPropertyValue("myCharacter", "\u0041");
    assertEquals(new Character('A'), cb.getMyCharacter());


    bw.setPropertyValue("myCharacter", " ");
    assertEquals(new Character(' '), cb.getMyCharacter());


    bw.setPropertyValue("myCharacter", "");
    assertNull(cb.getMyCharacter());
  }

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    assertEquals("", editor.getAsText());
  }


  public void testIndexedPropertiesWithCustomEditorForType() {
    IndexedTestBean bean = new IndexedTestBean();
    BeanWrapper bw = new BeanWrapperImpl(bean);
    bw.registerCustomEditor(String.class, new PropertyEditorSupport() {
      public void setAsText(String text) throws IllegalArgumentException {
        setValue("prefix" + text);
      }
    });
    TestBean tb0 = bean.getArray()[0];
    TestBean tb1 = bean.getArray()[1];
    TestBean tb2 = ((TestBean) bean.getList().get(0));
    TestBean tb3 = ((TestBean) bean.getList().get(1));
    TestBean tb4 = ((TestBean) bean.getMap().get("key1"));
    TestBean tb5 = ((TestBean) bean.getMap().get("key2"));
    assertEquals("name0", tb0.getName());
    assertEquals("name1", tb1.getName());
    assertEquals("name2", tb2.getName());
    assertEquals("name3", tb3.getName());
    assertEquals("name4", tb4.getName());
    assertEquals("name5", tb5.getName());
    assertEquals("name0", bw.getPropertyValue("array[0].name"));
    assertEquals("name1", bw.getPropertyValue("array[1].name"));
    assertEquals("name2", bw.getPropertyValue("list[0].name"));
    assertEquals("name3", bw.getPropertyValue("list[1].name"));
    assertEquals("name4", bw.getPropertyValue("map[key1].name"));
    assertEquals("name5", bw.getPropertyValue("map[key2].name"));
    assertEquals("name4", bw.getPropertyValue("map['key1'].name"));
    assertEquals("name5", bw.getPropertyValue("map[\"key2\"].name"));


    MutablePropertyValues pvs = new MutablePropertyValues();
    pvs.addPropertyValue("array[0].name", "name5");
    pvs.addPropertyValue("array[1].name", "name4");
    pvs.addPropertyValue("list[0].name", "name3");
    pvs.addPropertyValue("list[1].name", "name2");
    pvs.addPropertyValue("map[key1].name", "name1");
    pvs.addPropertyValue("map['key2'].name", "name0");
    bw.setPropertyValues(pvs);
    assertEquals("prefixname5", tb0.getName());
    assertEquals("prefixname4", tb1.getName());
    assertEquals("prefixname3", tb2.getName());
    assertEquals("prefixname2", tb3.getName());
    assertEquals("prefixname1", tb4.getName());
    assertEquals("prefixname0", tb5.getName());
    assertEquals("prefixname5", bw.getPropertyValue("array[0].name"));
    assertEquals("prefixname4", bw.getPropertyValue("array[1].name"));
    assertEquals("prefixname3", bw.getPropertyValue("list[0].name"));
    assertEquals("prefixname2", bw.getPropertyValue("list[1].name"));
    assertEquals("prefixname1", bw.getPropertyValue("map[\"key1\"].name"));
    assertEquals("prefixname0", bw.getPropertyValue("map['key2'].name"));
  }

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