Examples of org.apache.commons.digester3.Substitutor

org.apache.commons.digester3.Substitutor

(Logical) Interface for substitution strategies. (It happens to be implemented as a Java abstract class to allow future additions to be made without breaking backwards compatibility.)

Usage: When {@link Digester#setSubstitutor} is set, Digester calls the methods in this interface tocreate substitute values which will be passed into the Rule implementations. Of course, it is perfectly acceptable for implementations not to make substitutions and simply return the inputs.

Different strategies are supported for attributes and body text.
@since 1.6

        // Configure the digester as required
        digester.addObjectCreate( "root", SimpleTestBean.class );
        digester.addSetProperties( "root" );


        // Parse our test input.
        SimpleTestBean root = digester.parse( input );


        assertNotNull( "Digester returned no object", root );


        assertEquals( "${attr1}", root.getAlpha() );
        assertEquals( "var{attr2}", root.getBeta() );
    }

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        digester.setSubstitutor( new VariableSubstitutor( expander ) );
        digester.addObjectCreate( "root", SimpleTestBean.class );
        digester.addSetProperties( "root" );


        // Parse our test input.
        SimpleTestBean root = digester.parse( input );


        assertNotNull( "Digester returned no object", root );


        assertEquals( "${attr1}", root.getAlpha() );
        assertEquals( "var{attr2}", root.getBeta() );
    }

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        digester.parse( input );


        assertEquals( 2, this.simpleTestBeans.size() );


        {
            SimpleTestBean bean = this.simpleTestBeans.get( 0 );
            assertEquals( "source1.attr1", bean.getAlpha() );
            assertEquals( "source2.attr1", bean.getBeta() );
        }


        {
            SimpleTestBean bean = this.simpleTestBeans.get( 1 );
            assertEquals( "source1.attr2", bean.getAlpha() );
            assertEquals( "source2.attr2", bean.getBeta() );
        }
    }

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        digester.addObjectCreate( "root", SimpleTestBean.class );
        digester.addCallMethod( "root", "setAlpha", 0 );


        // Parse our test input.
        SimpleTestBean root = digester.parse( input );


        assertNotNull( "Digester returned no object", root );


        assertEquals( "Twas brillig and the slithy toves" + " did gyre and gimble in the wabe", root.getAlpha() );
    }

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        simpleTestBeans.clear();
        digester.push( this );
        digester.parse( input );


        assertEquals( 1, simpleTestBeans.size() );
        SimpleTestBean bean = simpleTestBeans.get( 0 );
        assertEquals( "prop.value", bean.getAlpha() );
    }

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        simpleTestBeans.clear();
        digester.push( this );
        digester.parse( input );


        assertEquals( 1, simpleTestBeans.size() );
        SimpleTestBean bean = simpleTestBeans.get( 0 );
        assertEquals( "substituted-prop.value1", bean.getAlpha() );
    }

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        catch ( IllegalArgumentException e )
        {
            // OK
        }


        Substitutor a = new SubstitutorStub( "XYZ", "", "a", "", "abc" );


        try
        {
            new CompoundSubstitutor( a, null );
            fail();

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    }


    @Test
    public void testChaining()
    {
        Substitutor a = new SubstitutorStub( "XYZ", "", "a", "", "abc" );
        Substitutor b = new SubstitutorStub( "STU", "", "b", "", "bcd" );


        Substitutor test = new CompoundSubstitutor( a, b );


        AttributesImpl attribFixture = new AttributesImpl( attrib );
        attribFixture.addAttribute( "", "a", ":a", "", "abc" );
        attribFixture.addAttribute( "", "b", ":b", "", "bcd" );


        assertTrue( areEqual( test.substitute( attrib ), attribFixture ) );
        assertEquals( test.substitute( bodyText ), "STU" );
    }

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        assertEquals( "Unsubstituted body text", "Do you feel luck punk?", tsr.body );
        assertEquals( "Unsubstituted number of attributes", 2, tsr.attributes.getLength() );
        assertEquals( "Unsubstituted forname attribute value", "Dirty", tsr.attributes.getValue( "forname" ) );
        assertEquals( "Unsubstituted surname attribute value", "Harry", tsr.attributes.getValue( "surname" ) );


        digester.setSubstitutor( new Substitutor()
        {
            @Override
            public Attributes substitute( Attributes attributes )
            {
                AttributesImpl results = new AttributesImpl();

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        assertEquals( "Unsubstituted body text", "Do you feel luck punk?", tsr.body );
        assertEquals( "Unsubstituted number of attributes", 2, tsr.attributes.getLength() );
        assertEquals( "Unsubstituted forname attribute value", "Dirty", tsr.attributes.getValue( "forname" ) );
        assertEquals( "Unsubstituted surname attribute value", "Harry", tsr.attributes.getValue( "surname" ) );


        digester.setSubstitutor( new Substitutor()
        {
            @Override
            public Attributes substitute( Attributes attributes )
            {
                AttributesImpl results = new AttributesImpl();

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