Groovy的AntBuilder,省略条件属性,像" setOmitNullAttributes"在MarkupBulder功能 [英] Groovy AntBuilder, omit conditional attributes, like "setOmitNullAttributes" functionality on MarkupBulder
问题描述
样code:
高清蚂蚁=新AntBuilder()
ant.'antlib:org.jacoco.ant:代理人(
启用:启用,
属性:'agentvmparam')
在该已启用参数为空,我想它是在Ant任务转换尚未present,不只是空。 空被评价为true http://ant.apache.org/手动/ develop.html#设定魔法这不是我想要的。
XML构建例如:
高清XML =新的MarkupBuilder()
xml.omitNullAttributes =真
xml.root(
RequiredAttribute标签:'要求',
optionalAttribute:optionalAttribute
){}
这是omitNullAttributes将确保optionalAttributeXML元素参数甚至没有present如果Groovy的参数的计算结果为null。
所以我得到
< RequiredAttribute标签根='需要'/>
而不是
< RequiredAttribute标签根='需要'optionalAttribute =''/>
可能的解决方法的位,但确实这项工作?
高清蚂蚁=新AntBuilder()
ant.'antlib:org.jacoco.ant:代理([启用:启用,
属性:'agentvmparam'] .findAll {!it.value = NULL})
即:使用的findAll
删除帕拉姆地图的空条目
sample code:
def ant = new AntBuilder()
ant.'antlib:org.jacoco.ant:agent'(
enabled: enabled,
property: 'agentvmparam')
When that "enabled" parameter is null, I'd like it to be not present in the ant task conversion, not merely "empty". "empty" gets evaluated to "true" http://ant.apache.org/manual/develop.html#set-magic which isn't what I want.
xml builder example:
def xml = new MarkupBuilder()
xml.omitNullAttributes = true
xml.root(
requiredAttribute:'required',
optionalAttribute: optionalAttribute
) { }
That "omitNullAttributes" will ensure that the "optionalAttribute" xml element parameter isn't even present if the Groovy parameter evaluates to null.
so I get
<root requiredAttribute='required' />
instead of
<root requiredAttribute='required' optionalAttribute='' />
Bit of a possible workaround, but does this work?
def ant = new AntBuilder()
ant.'antlib:org.jacoco.ant:agent'( [ enabled:enabled,
property:'agentvmparam' ].findAll { it.value != null } )
ie: use a findAll
to remove the null entries of the param map
这篇关于Groovy的AntBuilder,省略条件属性,像&QUOT; setOmitNullAttributes&QUOT;在MarkupBulder功能的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!