Quantors and an if-statement for Metamorph #154
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The statement implements a universal quantor or conjunction operation (logical and-operation). It allows for checking whether all statements contained in the <all> statement generated an output. Using the <all> statement conjunctions can be written in a more expressive way than (ab)using the <combine> statement allows. By default the <all> statement outputs an unamed literal with "true" as value. However, this can be customized. <all name="MyCustomName" value="all-fired"> <data source="data1" /> <data source="data2" /> </all> The <all> statement supports reset and flushWith.
The statement implements a existential quantor or disjunction operation (logical or-operation). It allows for checking whether at least one of the statements contained in the <any> statement generated an output. Using the <any> statement disjunctions can be written in a more expressive way than (ab)using the <combine> statement allows. By default the <any> statement outputs an unamed literal with "true" as value. However, this can be customized. <any name="MyCustomName" value="one-fired"> <data source="data1" /> <data source="data2" /> </any> The <any> statement supports reset and flushWith.
The statement implements a logical not-operation. It allows for checking whether none of the statements contained in the <none> statement generated an output. Using the <none> statement negations can be written in a more expressive way than (ab)using the <combine> and <choose> statements allows. By default the <none> statement outputs an unamed literal with "true" as value. However, this can be customized. <none name="MyCustomName" value="none-fired"> <data source="data1" /> <data source="data2" /> </none> The <none> statement supports reset and flushWith.
This commits introduces an <if> statement which can be used to control
under which conditions a collector generates output. It can be used for
example to write a combine statement that only generates outputif data3
has a value of "x":
<combine name="output" value="${a}${b}">
<if>
<data source="data3">
<equals string="x" />
</data>
</if>
<data source="data1" name="a" />
<data source="data2" name="b" />
</combine>
The quantors introduced by commits 475a55f, 12a0537 and
e65f6d2 are meant to be used inside the <if> statement.
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+1 |
Updated equalsFilter to support the new if statement Conflicts: src/test/java/org/culturegraph/mf/morph/collectors/CollectorTest.java
blackwinter
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Dec 13, 2024
Change `substring()` Fix function to be compatible with Catmandu.
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Added an if-statement and three quantor-statements to Metamorph. These new statements allow to write more conditional transformations in a more expressive way than combine allows