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## com.google.appengine.api.prospectivesearch.dev
Class QueryEvaluator

    java.lang.Object
      com.google.appengine.api.prospectivesearch.dev.QueryEvaluator

All Implemented Interfaces:
  com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

    public class QueryEvaluator

extends java.lang.Object
implements com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

The QueryEvaluator class performs a full visit of the query tree, dispatching leaf evaluations to the QueryEngine. Fine-grained debugging of query parsing is available at the logging level java.util.logging.Level.FINEST. Not multi-thread safe.

Method Summary
`void` | `visitConjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents a conjunction (logical and) of conditions.
`void` | `visitContains(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents that a field must contain a value.
`void` | `visitDisjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents a disjunction (logical or) of conditions.
`void` | `visitEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents that a field value must be greater than or equal to some specified value.
`void` | `visitFuzzy(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents a text field that is subject to query rewrite.
`void` | `visitGreaterOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents an inequality between a field and value.
`void` | `visitGreaterThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents that a field value must be greater than some specified value.
`void` | `visitLessOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents that a field value must be less than or equal to some specified value.
`void` | `visitLessThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents that a field value must be less than some specified value.
`void` | `visitLiteral(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents a text field that must not be altered.
`void` | `visitNegation(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents a negation of conditions.
`void` | `visitOther(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Catch-all method for future type of query nodes.
`void` | `visitRestriction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents a condition restricted to a named field.
`void` | `visitValue(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches)` Visits a node that represents a constant value.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

### visitConjunction

    public void visitConjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                                 Tree node,
                                 java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents a conjunction (logical and) of conditions.

  Specified by:
    `visitConjunction` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`
  Parameters:
    `matches` - Is set to the conjunction of node's sub-expressions.

### visitDisjunction

    public void visitDisjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                                 Tree node,
                                 java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents a disjunction (logical or) of conditions.

  Specified by:
    `visitDisjunction` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`
  Parameters:
    `matches` - Is set to the disjunction of node's sub-expressions.

### visitNegation

    public void visitNegation(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                              Tree node,
                              java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents a negation of conditions.

  Specified by:
    `visitNegation` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`
  Parameters:
    `matches` - Is set to the negation of node's sub-expression.

### visitRestriction

    public void visitRestriction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                                 Tree node,
                                 java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents a condition restricted to a named field.

  Specified by:
    `visitRestriction` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`
  Parameters:
    `matches` - Is set to the value of node's sub-expression.

### visitFuzzy

    public void visitFuzzy(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                           Tree node,
                           java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents a text field that is subject to query rewrite.

  Specified by:
    `visitFuzzy` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitLiteral

    public void visitLiteral(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                             Tree node,
                             java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents a text field that must not be altered.

  Specified by:
    `visitLiteral` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitLessThan

    public void visitLessThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                              Tree node,
                              java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents that a field value must be less than some specified value.

  Specified by:
    `visitLessThan` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitLessOrEqual

    public void visitLessOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                                 Tree node,
                                 java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents that a field value must be less than or equal to some specified value.

  Specified by:
    `visitLessOrEqual` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitGreaterThan

    public void visitGreaterThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                                 Tree node,
                                 java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents that a field value must be greater than some specified value.

  Specified by:
    `visitGreaterThan` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitGreaterOrEqual

    public void visitGreaterOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                                    Tree node,
                                    java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents an inequality between a field and value.

  Specified by:
    `visitGreaterOrEqual` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitEqual

    public void visitEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                           Tree node,
                           java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents that a field value must be greater than or equal to some specified value.

  Specified by:
    `visitEqual` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitContains

    public void visitContains(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                              Tree node,
                              java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents that a field must contain a value.

  Specified by:
    `visitContains` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitValue

    public void visitValue(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                           Tree node,
                           java.util.concurrent.atomic.AtomicBoolean matches)

  Visits a node that represents a constant value.

  Specified by:
    `visitValue` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

### visitOther

    public void visitOther(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                           Tree node,
                           java.util.concurrent.atomic.AtomicBoolean matches)

  Catch-all method for future type of query nodes.

  Specified by:
    `visitOther` in interface `com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>`

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