BuilderSupport

package groovy.util

class SpoofBuilder extends BuilderSupport{
    def log = []
    protected void setParent(Object parent, Object child){
        log << "sp"
        log << parent
        log << child
    }
    protected Object createNode(Object name){
        log << 'cn1'
        log <<  name
        return 'x'
    }
    protected Object createNode(Object name, Object value){
        log << 'cn2'
        log << name
        log << value
        return 'x'
    }
    protected Object createNode(Object name, Map attributes){
        log << 'cn3'
        log << name
        attributes.each{entry -> log << entry.key; log << entry.value}
        return 'x'
    }
    protected Object createNode(Object name, Map attributes, Object value){
        log << 'cn4'
        log << name
        attributes.each{entry -> log << entry.key; log << entry.value}
        log << value
        return 'x'
    }
    protected void nodeCompleted(Object parent, Object node) {
        log << 'nc'
        log << parent
        log << node
    }
}

// simple node
def b = new SpoofBuilder()
assert b.log == []
def node = b.foo()
assert b.log == ['cn1','foo','nc',null, node]

// simple node with value
def b = new SpoofBuilder()
def node = b.foo('value')
assert b.log == ['cn2','foo','value', 'nc',null,node]

// simple node with one attribute
def b = new SpoofBuilder()
def node = b.foo(name:'value')
assert b.log == [
    'cn3','foo', 'name','value', 'nc',null,'x']

// how is closure applied?
def b = new SpoofBuilder()
b.foo(){
    b.bar()
}
assert b.log == [
    'cn1','foo',
        'cn1','bar',
    'sp', 'x', 'x',
        'nc','x','x',
    'nc',null,'x']