Examples of org.apache.commons.digester3.Digester.pop()

Class org.apache.commons.digester3.Digester

Examples of org.apache.commons.digester3.Digester.pop()

org.apache.commons.digester3.Digester.pop()
Pop the top object off of the stack, and return it. If there are no objects on the stack, return null. @param < T> the type used to auto-cast the returned object to the assigned variable type @return the top object popped off of the stack

        String testStackName = "org.apache.commons.digester3.tests.testNamedStackPushPeekPop";
        Digester digester = new Digester();
        assertTrue( "Stack starts empty:", digester.isEmpty( testStackName ) );
        digester.push( testStackName, archimedesAveragePi );
        assertEquals( "Peeked value:", archimedesAveragePi, digester.peek( testStackName ) );
        assertEquals( "Popped value:", archimedesAveragePi, digester.pop( testStackName ) );
        assertTrue( "Stack ends empty:", digester.isEmpty( testStackName ) );


        digester.push( testStackName, "1" );
        digester.push( testStackName, "2" );
        digester.push( testStackName, "3" );

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        String testStackOneName = "org.apache.commons.digester3.tests.testNamedIndependenceOne";
        String testStackTwoName = "org.apache.commons.digester3.tests.testNamedIndependenceTwo";
        Digester digester = new Digester();
        digester.push( testStackOneName, "Tweedledum" );
        digester.push( testStackTwoName, "Tweedledee" );
        assertEquals( "Popped value one:", "Tweedledum", digester.pop( testStackOneName ) );
        assertEquals( "Popped value two:", "Tweedledee", digester.pop( testStackTwoName ) );
    }


    /** Tests popping named stack not yet pushed */
    @Test

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        String testStackTwoName = "org.apache.commons.digester3.tests.testNamedIndependenceTwo";
        Digester digester = new Digester();
        digester.push( testStackOneName, "Tweedledum" );
        digester.push( testStackTwoName, "Tweedledee" );
        assertEquals( "Popped value one:", "Tweedledum", digester.pop( testStackOneName ) );
        assertEquals( "Popped value two:", "Tweedledee", digester.pop( testStackTwoName ) );
    }


    /** Tests popping named stack not yet pushed */
    @Test
    public void testPopNamedStackNotPushed()

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        String testStackName = "org.apache.commons.digester3.tests.testPopNamedStackNotPushed";
        Digester digester = new Digester();
        try
        {


            digester.pop( testStackName );
            fail( "Expected an EmptyStackException" );


        }
        catch ( EmptyStackException e )
        {

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                     digester.isEmpty( testStackName ) );


        digester.peek( testStackName );
        assertFalse( "Peek should not effect whether the stack is empty", digester.isEmpty( testStackName ) );


        digester.pop( testStackName );
        assertTrue( "A named stack that has it's last object popped is empty", digester.isEmpty( testStackName ) );
    }


    /**
     * Test the Digester.getRoot method.

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        // for obj3, replacement only occurs on pop
        assertSame( obj3, d.peek( 1 ) );
        assertSame( obj2, d.peek( 2 ) );
        assertSame( obj1, d.peek( 3 ) );


        Object obj4a = d.pop();
        Object obj3a = d.pop();
        Object obj2a = d.pop();
        Object obj1a = d.pop();


        assertFalse( obj4 == obj4a );

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        assertSame( obj3, d.peek( 1 ) );
        assertSame( obj2, d.peek( 2 ) );
        assertSame( obj1, d.peek( 3 ) );


        Object obj4a = d.pop();
        Object obj3a = d.pop();
        Object obj2a = d.pop();
        Object obj1a = d.pop();


        assertFalse( obj4 == obj4a );
        assertEquals( obj4, obj4a );

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        assertSame( obj2, d.peek( 2 ) );
        assertSame( obj1, d.peek( 3 ) );


        Object obj4a = d.pop();
        Object obj3a = d.pop();
        Object obj2a = d.pop();
        Object obj1a = d.pop();


        assertFalse( obj4 == obj4a );
        assertEquals( obj4, obj4a );
        assertFalse( obj3 == obj4a );

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        assertSame( obj1, d.peek( 3 ) );


        Object obj4a = d.pop();
        Object obj3a = d.pop();
        Object obj2a = d.pop();
        Object obj1a = d.pop();


        assertFalse( obj4 == obj4a );
        assertEquals( obj4, obj4a );
        assertFalse( obj3 == obj4a );
        assertEquals( obj3, obj3a );

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        assertSame( obj2, obj2a );
        assertSame( obj1, obj1a );


        d.push( "stack1", obj8 );
        d.push( "stack1", obj9 );
        Object obj9a = d.pop( "stack1" );
        Object obj8a = d.pop( "stack1" );


        assertSame( obj8, obj8a );
        assertSame( obj9, obj9a );

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