QueryTreeContext (Google App Engine API for Java)

com.google.appengine.api.search.query

Class QueryTreeContext<T extends QueryTreeContext<T>>

  • java.lang.Object
    • com.google.appengine.api.search.query.QueryTreeContext<T>
  • Type Parameters:
    T - the actual class used by specific tree visitors


    public abstract class QueryTreeContext<T extends QueryTreeContext<T>>
    extends java.lang.Object
    The base class for specific query tree context used by the walker. This class is used to maintain additional information gathered while walking the tree. On this level it is used to collect return type information.
    • Method Detail

      • addChild

        public T addChild()
        Returns:
        a child context for this context
      • children

        public java.lang.Iterable<T> children()
        Returns:
        iterable over all children contexts
      • getChildCount

        public int getChildCount()
        Returns:
        the number of children contexts
      • getChild

        public T getChild(int index)
        Parameters:
        index - the index of the child to get
        Returns:
        the child context at the given index
      • addReturnType

        public void addReturnType(QueryTreeContext.Type type)
        Parameters:
        type - additional type to be added to current return types
      • setReturnType

        public void setReturnType(QueryTreeContext.Type type)
        Parameters:
        type - the unique return type for this context
      • setReturnTypes

        public void setReturnTypes(java.util.Set<QueryTreeContext.Type> type)
        Parameters:
        type - a set of types to be set as the only return types
      • setInDisjunction

        public void setInDisjunction(boolean inDisjunction)
      • getReturnTypes

        public java.util.Set<QueryTreeContext.Type> getReturnTypes()
        Returns:
        the set of return types
      • getCommonReturnTypes

        public java.util.Set<QueryTreeContext.Type> getCommonReturnTypes(T other)
        Parameters:
        other - the other context whose types are to be inspected
        Returns:
        a set of types common to this and the other context
      • isCompatibleWith

        public boolean isCompatibleWith(QueryTreeContext.Type returnType)
        Parameters:
        returnType - the type to be checked against types of this context
        Returns:
        whether or not it is compatible with at least one type
      • setRewriteMode

        public void setRewriteMode(QueryTreeContext.RewriteMode mode)
        Parameters:
        mode - the rewrite mode for the value represented by this context
      • isFuzzy

        public boolean isFuzzy()
        Returns:
        whether or not the value associated with this context is rewritable
      • isStrict

        public boolean isStrict()
        Returns:
        whether or not the value associated with this context must not be rewritten
      • isPhrase

        public boolean isPhrase()
        Returns:
        whether or not this context represents a phrase (quoted text)
      • isFunction

        public boolean isFunction()
        Returns:
        if this context represents a function
      • isLiteral

        public boolean isLiteral()
        Returns:
        if this context represents a literal constant
      • isField

        public boolean isField()
        Returns:
        returns if this context represents a field of a document
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